78 results on '"T. Keles"'
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2. Autoantibodies neutralizing type I IFNs are present in ~4% of uninfected individuals over 70 years old and account for ~20% of COVID-19 deaths
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Bastard, P. Gervais, A. Voyer, T.L. Rosain, J. Philippot, Q. Manry, J. Michailidis, E. Hoffmann, H.-H. Eto, S. Garcia-Prat, M. Bizien, L. Parra-Martínez, A. Yang, R. Haljasmägi, L. Migaud, M. Särekannu, K. Maslovskaja, J. De Prost, N. Tandjaoui-Lambiotte, Y. Luyt, C.-E. Amador-Borrero, B. Gaudet, A. Poissy, J. Morel, P. Richard, P. Cognasse, F. Troya, J. Trouillet-Assant, S. Belot, A. Saker, K. Garçon, P. Rivière, J.G. Lagier, J.-C. Gentile, S. Rosen, L.B. Shaw, E. Morio, T. Tanaka, J. Dalmau, D. Tharaux, P.-L. Sene, D. Stepanian, A. Megarbane, B. Triantafyllia, V. Fekkar, A. Heath, J.R. Franco, J.L. Anaya, J.-M. Solé-Violán, J. Imberti, L. Biondi, A. Bonfanti, P. Castagnoli, R. Delmonte, O.M. Zhang, Y. Snow, A.L. Holland, S.M. Biggs, C.M. Moncada-Vélez, M. Arias, A.A. Lorenzo, L. Boucherit, S. Coulibaly, B. Anglicheau, D. Planas, A.M. Haerynck, F. Duvlis, S. Nussbaum, R.L. Ozcelik, T. Keles, S. Bousfiha, A.A. El Bakkouri, J. Ramirez-Santana, C. Paul, S. Pan-Hammarström, Q. Hammarström, L. Dupont, A. Kurolap, A. Metz, C.N. Aiuti, A. Casari, G. Lampasona, V. Ciceri, F. Barreiros, L.A. Dominguez-Garrido, E. Vidigal, M. Zatz, M. Van De Beek, D. Sahanic, S. Tancevski, I. Stepanovskyy, Y. Boyarchuk, O. Nukui, Y. Tsumura, M. Vidaur, L. Tangye, S.G. Burrel, S. Duffy, D. Quintana-Murci, L. Klocperk, A. Kann, N.Y. Shcherbina, A. Lau, Y.-L. Leung, D. Coulongeat, M. Marlet, J. Koning, R. Reyes, L.F. Chauvineau-Grenier, A. Venet, F. Monneret, G. Nussenzweig, M.C. Arrestier, R. Boudhabhay, I. Baris-Feldman, H. Hagin, D. Wauters, J. Meyts, I. Dyer, A.H. Kennelly, S.P. Bourke, N.M. Halwani, R. Sharif-Askari, N.S. Dorgham, K. Sallette, J. Sedkaoui, S.M. AlKhater, S. Rigo-Bonnin, R. Morandeira, F. Roussel, L. Vinh, D.C. Ostrowski, S.R. Condino-Neto, A. Prando, C. Bondarenko, A. Spaan, A.N. Gilardin, L. Fellay, J. Lyonnet, S. Bilguvar, K. Lifton, R.P. Mane, S. Anderson, M.S. Boisson, B. Béziat, V. Zhang, S.-Y. Andreakos, E. Hermine, O. Pujol, A. Peterson, P. Mogensen, T.H. Rowen, L. Mond, J. Debette, S. De Lamballerie, X. Duval, X. Mentré, F. Zins, M. Soler-Palacin, P. Colobran, R. Gorochov, G. Solanich, X. Susen, S. Martinez-Picado, J. Raoult, D. Vasse, M. Gregersen, P.K. Piemonti, L. Rodríguez-Gallego, C. Notarangelo, L.D. Su, H.C. Kisand, K. Okada, S. Puel, A. Jouanguy, E. Rice, C.M. Tiberghien, P. Zhang, Q. Cobat, A. Abel, L. Casanova, J.-L. Alavoine, L. Behillil, S. Burdet, C. Charpentier, C. Dechanet, A. Descamps, D. Ecobichon, J.-L. Enouf, V. Frezouls, W. Houhou, N. Kafif, O. Lehacaut, J. Letrou, S. Lina, B. Lucet, J.-C. Manchon, P. Nouroudine, M. Piquard, V. Quintin, C. Thy, M. Tubiana, S. Van Der Werf, S. Vignali, V. Visseaux, B. Yazdanpanah, Y. Chahine, A. Waucquier, N. Migaud, M.-C. Deplanque, D. Djossou, F. Mergeay-Fabre, M. Lucarelli, A. Demar, M. Bruneau, L. Gerardin, P. Maillot, A. Payet, C. Laviolle, B. Laine, F. Paris, C. Desille-Dugast, M. Fouchard, J. Malvy, D. Nguyen, D. Pistone, T. Perreau, P. Gissot, V. Le Goas, C. Montagne, S. Richard, L. Chirouze, C. Bouiller, K. Desmarets, M. Meunier, A. Lefevre, B. Jeulin, H. Legrand, K. Lomazzi, S. Tardy, B. Gagneux-Brunon, A. Bertholon, F. Botelho-Nevers, E. Christelle, K. Nicolas, L. Roufai, L. Amat, K. Couffin-Cadiergues, S. Esperou, H. Hendou, S. Townsend, L. Cheallaigh, C.N. Bergin, C. Martin-Loeches, I. Dunne, J. Conlon, N. O'Farrelly, C. Abad, J. Accordino, G. Achille, C. Aguilera-Albesa, S. Aguilo-Cucurull, A. Ozkan, E.A. Darazam, I.A. Albisures, J.A.R. Aldave, J.C. Ramos, M.A. Khan, T.A. Aliberti, A. Nadji, S.A. Alkan, G. AlKhater, S.A. Allardet-Servent, J. Allende, L.M. Alonso-Arias, R. Alshahrani, M.S. Alsina, L. Alyanakian, M.-A. Borrero, B.A. Amoura, Z. Antoli, A. Aubart, M. Auguet, T. Avramenko, I. Aytekin, G. Azot, A. Bahram, S. Bajolle, F. Baldanti, F. Baldolli, A. Ballester, M. Feldman, H.B. Barrou, B. Barzaghi, F. Basso, S. Bayhan, G.I. Bezrodnik, L. Bilbao, A. Blanchard-Rohner, G. Blanco, I. Blandinieres, A. Blazquez-Gamero, D. Bleibtreu, A. Bloomfield, M. Bolivar-Prados, M. Borghesi, A. Borie, R. Botdhlo-Nevers, E. Bousquet, A. Boutolleau, D. Bouvattier, C. Bravais, J. Briones, M.L. Brunner, M.-E. Bruno, R. Bueno, M.R.P. Bukhari, H. Bustamante, J. Agra, J.J.C. Capra, R. Carapito, R. Carrabba, M. Casasnovas, C. Caseris, M. Cassaniti, I. Castelle, M. Castelli, F. De Vera, M.C. Castro, M.V. Catherinot, E. Celik, J.B. Ceschi, A. Chalumeau, M. Charbit, B. Cheng, M.P. Clave, P. Clotet, B. Codina, A. Cohen, Y. Comarmond, C. Combes, A. Comoli, P. Corsico, A.G. Coşkuner, T. Cvetkovski, A. Cyrus, C. Danion, F. Darley, D.R. Das, V. Dauby, N. Dauger, S. De Munter, P. De Pontual, L. Dehban, A. Delplancq, G. Demoule, A. Desguerre, I. Di Sabatino, A. Diehl, J.-L. Dobbelaere, S. Dubost, C. Ekwall, O. Bozdemir, Ş.E. Elnagdy, M.H. Emiroglu, M. Endo, A. Erdeniz, E.H. Aytekin, S.E. Lasa, M.P.E. Euvrard, R. Fabio, G. Faivre, L. Falck, A. Fartoukh, M. Faure, M. Arquero, M.F. Ferrer, R. Ferreres, J. Flores, C. Francois, B. Fumado, V. Fung, K.S.C. Fusco, F. Gagro, A. Solis, B.G. Gaussem, P. Gayretli, Z. Gil-Herrera, J. Gatineau, A.G. Girona-Alarcon, M. Godinez, K.A.C. Goffard, J.-C. Gonzales, N. Gonzalez-Granado, L.I. Gonzalez-Montelongo, R. Guerder, A. Gulhan, B. Gumucio, V.D. Hanitsch, L.G. Gunst, J. Gut, M. Hadjadj, J. Hancerli, S. Hariyan, T. Hatipoglu, N. Heppekcan, D. Hernandez-Brito, E. Ho, P.-K. Holanda-Pena, M.S. Horcajada, J.P. Hraiech, S. Humbert, L. Hung, I.F.N. Iglesias, A.D. Inigo-Campos, A. Jamme, M. Arranz, M.J. Jimeno, M.-T. Jordan, I. Kanik-Yuksek, S. Kara, Y.B. Karahan, A. Karbuz, A. Yasar, K.K. Kasapcopur, O. Kashimada, K. Demirkol, Y.K. Kido, Y. Kizil, C. Kilic, A.O. Koutsoukou, A. Krol, Z.J. Ksouri, H. Kuentz, P. Kwan, A.M.C. Kwan, Y.W.M. Kwok, J.S.Y. Lam, D.S.Y. Lampropoulou, V. Lanternier, F. Le Bourgeois, F. Leo, Y.-S. Lopez, R.L. Levin, M. Levy, M. Levy, R. Li, Z. Lilleri, D. Lima, E.J.A.B. Linglart, A. Lopez-Collazo, E. Lorenzo-Salazar, J.M. Louapre, C. Lubetzki, C. Lung, K.-C. Lye, D.C. Magnone, C. Mansouri, D. Marchioni, E. Marioli, C. Marjani, M. Marques, L. Pereira, J.M. Martin-Nalda, A. Pueyo, D.M. Marzana, I. Mata-Martinez, C. Mathian, A. Matos, L.R.B. Matthews, G.V. Mayaux, J. McLaughlin-Garcia, R. Meersseman, P. Mege, J.-L. Mekontso-Dessap, A. Melki, I. Meloni, F. Meritet, J.-F. Merlani, P. Akcan, O.M. Mezidi, M. Migeotte, I. Millereux, M. Million, M. Mirault, T. Mircher, C. Mirsaeidi, M. Mizoguchi, Y. Modi, B.P. Mojoli, F. Moncomble, E. Melian, A.M. Martinez, A.M. Morange, P.-E. Mordacq, C. Morelle, G. Mouly, S.J. Munoz-Barrera, A. Nafati, C. Nagashima, S. Nakagama, Y. Neven, B. Neves, J.F. Ng, L.F.P. Ng, Y.-Y. Nielly, H. Medina, Y.N. Cuadros, E.N. Ocejo-Vinyals, J.G. Okamoto, K. Oualha, M. Ouedrani, A. Ozkaya-Parlakay, A. Pagani, M. Papadaki, M. Parizot, C. Parola, P. Pascreau, T. Paz-Artal, E. Pedraza, S. Pellecer, N.C.G. Pellegrini, S. De Diego, R.P. Perez-Fernandez, X.L. Philippe, A. Picod, A. De Chambrun, M.P. Piralla, A. Planas-Serra, L. Ploin, D. Poncelet, G. Poulakou, G. Pouletty, M.S. Pourshahnazari, P. Qiu-Chen, J.L. Quentric, P. Rambaud, T. Raoult, V. Rebillat, A.-S. Redin, C. Resmini, L. Ricart, P. Richard, J.-C. Rivet, N. Rocamora-Blanch, G. Rodero, M.P. Rodrigo, C. Rodriguez, L.A. Rodriguez-Palmero, A. Romero, C.S. Rothenbuhler, A. Roux, D. Rovina, N. Rozenberg, F. Ruch, Y. Ruiz, M. Del Prado, M.Y.R. Ruiz-Rodriguez, J.C. Sabater-Riera, J. Saks, K. Salagianni, M. Sanchez, O. Sanchez-Montalva, A. Sanchez-Ramon, S. Schidlowski, L. Schluter, A. Schmidt, J. Schmidt, M. Schuetz, C. Schweitzer, C.E. Scolari, F. Sediva, A. Seijo, L. Seminario, A.G. Seng, P. Senoglu, S. Seppanen, M. Llovich, A.S. Shahrooei, M. Siguret, V. Siouti, E. Smadja, D.M. Smith, N. Sobh, A. Soler, C. Sozeri, B. Stella, G.M. Stepanovskiy, Y. Stoclin, A. Taccone, F. Taupin, J.-L. Tavernier, S.J. Terrier, B. Thiery, G. Thorball, C. Thorn, K. Thumerelle, C. Tipu, I. Tolstrup, M. Tomasoni, G. Toubiana, J. Alvarez, J.T. Tsang, O.T.Y. Tserel, L. Tso, E.Y.K. Tucci, A. Oz, Ş.K.T. Ursini, M.V. Utsumi, T. Uzunhan, Y. Vabres, P. Valencia-Ramos, J. Van Den Rym, A.M. Vandernoot, I. Velez-Santamaria, V. Veliz, S.P.Z. Vidigal, M.C. Viel, S. Vilain, C. Vilaire-Meunier, M.E. Villar-Garcia, J. Vincent, A. Vogt, G. Voiriot, G. Volokha, A. Vuotto, F. Wauters, E. Wu, A.K.L. Wu, T.-C. Yahşi, A. Yesilbas, O. Yildiz, M. Young, B.E. Yukselmiş, U. Zecca, M. Zuccaro, V. Van Praet, J. Lambrecht, B.N. Van Braeckel, E. Bosteels, C. Hoste, L. Hoste, E. Bauters, F. De Clercq, J. Heijmans, C. Slabbynck, H. Naesens, L. Florkin, B. Boulanger, C. Vanderlinden, D. Allavena, C. Andrejak, C. Angoulvant, F. Azoulay, C. Bachelet, D. Bartoli, M. Basmaci, R. Behillill, S. Beluze, M. Benech, N. Benkerrou, D. Bhavsar, K. Bitker, L. Bouadma, L. Bouscambert-Duchamp, M. Paz, P.C. Cervantes-Gonzalez, M. Chair, A. Coelho, A. Cordel, H. Couffignal, C. D'Ortenzio, E. De Montmollin, E. Debard, A. Debray, M.-P. Desvallee, M. Diallo, A. Diouf, A. Dorival, C. Dubos, F. Eloy, P. Epaulard, O. Esposito-Farase, M. Etienne, M. Garot, D. Gault, N. Gaymard, A. Ghosn, J. Gigante, T. Gilg, M. Goehringer, F. Guedj, J. Hoctin, A. Hoffmann, I. Houas, I. Hulot, J.-S. Jaafoura, S. Kaguelidou, F. Kali, S. Kerroumi, Y. Khalil, A. Khan, C. Kimmoun, A. Laouenan, C. Laribi, S. Le, M. Le Bris, C. Le Gac, S. Le Hingrat, Q. Le Mestre, S. Le Nagard, H. Lemaignen, A. Lemee, V. Lescure, F.-X. Levy, Y. Lingas, G. Lucet, J.C. MacHado, M. Mambert, M. Manuel, A. Meziane, A. Mouquet, H. Mullaert, J. Neant, N. Noret, M. Papadopoulos, A. Paul, C. Peiffer-Smadja, N. Peigne, V. Petrov-Sanchez, V. Peytavin, G. Pham, H. Picone, O. Puechal, O. Rosa-Calatrava, M. Rossignol, B. Rossignol, P. Roy, C. Schneider, M. Su, R. Tardivon, C. Tellier, M.-C. Teoule, F. Terrier, O. Timsit, J.F. Tual, C. Vanel, N. Veislinger, A. Wiedemann, A. Danielson, J.J. Dobbs, K. Kashyap, A. Ding, L. Dalgard, C.L. Sottini, A. Quaresima, V. Quiros-Roldan, E. Rossi, C. Bettini, L.R. D'Angio, M. Beretta, I. Montagna, D. Licari, A. Marseglia, G.L. Storgaard, M. Jorgensen, S. Al-Muhsen, S. Al-Mulla, F. Arias, A.A. Bogunovic, D. Bolze, A. Brodin, P. Bryceson, Y. Bustamante, C.D. Butte, M.J. Chakravorty, S. Christodoulou, J. Constantinescu, S.N. Cooper, M.A. Desai, M. Drolet, B.A. El Baghdadi, J. Espinosa-Padilla, S. Froidure, A. Henrickson, S.E. Hsieh, E.W.Y. Husebye, E.S. Imai, K. Itan, Y. Jarvis, E.D. Karamitros, T. Ku, C.-L. Ling, Y. Lucas, C.L. Maniatis, T. Marodi, L. Milner, J.D. Mironska, K. Novelli, A. Novelli, G. Renia, L. Resnick, I. Sancho-Shimizu, V. Seppanen, M.R.J. Shahrooei, M. Slaby, O. Tayoun, A.A. Ramaswamy, S. Turvey, S.E. Furkan Uddin, K.M. Uddin, M.J. Von Bernuth, H. Zawadzki, P. Bigio, B. De La Chapelle, A. Chen, J. Chrabieh, M. Liu, D. Nemirowskaya, Y. Cruz, I.M. Materna, M. Pelet, S. Seeleuthner, Y. Thibault, C. Liu, Z. Foti, G. Bellani, G. Citerio, G. Contro, E. Pesci, A. Valsecchi, M.G. Cazzaniga, M. Batten, I. Reddy, C. McElheron, M. Noonan, C. Connolly, E. Fallon, A. Erikstrup, C. Pedersen, O.B. Sorensen, E. Mikkelsen, S. Dinh, K.M. Larsen, M.A.H. Paulsen, I.W. Von Stemann, J.H. Hansen, M.B. Annereau, J.-P. Briseno-Roa, L. Gribouval, O. Pelet, A. Alcover, A. Aschard, H. Bousso, P. Bruhns, P. Cerf-Bensussan, N. Cumano, A. D'Enfert, C. Deriano, L. Dillies, M.-A. Di Santo, J. Dromer, F. Eberl, G. Enninga, J. Gomperts-Boneca, I. Hasan, M. Hedestam, G.K. Hercberg, S. Ingersoll, M.A. Lantz, O. Kenny, R.A. Menager, M. Michel, F. Patin, E. Pellegrini, S. Rausell, A. Rieux-Laucat, F. Rogge, L. Fontes, M. Sakuntabhai, A. Schwartz, O. Schwikowski, B. Shorte, S. Tangy, F. Toubert, A. Touvier, M. Ungeheuer, M.-N. Zimmer, C. Albert, M.L. Van Agtmael, M. Algera, A.G. Appelman, B. Van Baarle, F. Bax, D. Beudel, M. Bogaard, H.J. Bomers, M. Bonta, P. Bos, L. Botta, M. De Brabander, J. De Bree, G. De Bruin, S. Buis, D.T.P. Bugiani, M. Bulle, E. Chouchane, O. Cloherty, A. Dijkstra, M. Dongelmans, D.A. Dujardin, R.W.G. Elbers, P. Fleuren, L. Geerlings, S. Geijtenbeek, T. Girbes, A. Goorhuis, B. Grobusch, M.P. Hafkamp, F. Hagens, L. Hamann, J. Harris, V. Hemke, R. Hermans, S.M. Heunks, L. Hollmann, M. Horn, J. Hovius, J.W. De Jong, M.D. Lim, E.H.T. Van Mourik, N. Nellen, J. Nossent, E.J. Paulus, F. Peters, E. Pina-Fuentes, D.A.I. Van Der Poll, T. Preckel, B. Prins, J.M. Raasveld, J. Reijnders, T. De Rotte, M.C.F.J. Schinkel, M. Schultz, M.J. Schrauwen, F.A.P. Schuurman, A. Schuurmans, J. Sigaloff, K. Slim, M.A. Smeele, P. Smit, M. Stijnis, C.S. Stilma, W. Teunissen, C. Thoral, P. Tsonas, A.M. Tuinman, P.R. Van Der Valk, M. Veelo, D. Volleman, C. De Vries, H. Vught, L.A. Van Vugt, M. Wouters, D. Zwinderman, A.H. Brouwer, M.C. Joost Wiersinga, W. Vlaar, A.P.J. Nadif, R. Goldberg, M. Ozguler, A. Henny, J. Lemonnier, S. Coeuret-Pellicer, M. Le Got, S. Tzourio, C. Dufouil, C. Soumare, A. Lachaize, M. Fievet, N. Flaig, A. Martin, F. Bonneaudeau, B. Cannet, D. Gallian, P. Jeanne, M. Perroquin, M. Hamzeh-Cognasse, H. CoV-Contact Cohort St James's Hospital, SARS CoV2 Interest group COVID Clinicians French COVID Cohort Study Group NIAID Immune Response to COVID Group Danish CHGE COVID Human Genetic Effort HGID Lab COVID-STORM Clinicians NH-COVAIR Study Group The Danish Blood Donor Study (DBDS) Imagine COVID-Group The Milieu Interieur Consortium Amsterdam UMC Covid-19 Biobank CONSTANCES cohort 3C-Dijon Study Cerba HealthCare Etablissement du Sang study group
- Abstract
Circulating autoantibodies (auto-Abs) neutralizing high concentrations (10 ng/ml; in plasma diluted 1:10) of IFN-α and/or IFN-ω are found in about 10% of patients with critical COVID-19 (coronavirus disease 2019) pneumonia but not in individuals with asymptomatic infections. We detect auto-Abs neutralizing 100-fold lower, more physiological, concentrations of IFN-α and/or IFN-ω (100 pg/ml; in 1:10 dilutions of plasma) in 13.6% of 3595 patients with critical COVID-19, including 21% of 374 patients >80 years, and 6.5% of 522 patients with severe COVID-19. These antibodies are also detected in 18% of the 1124 deceased patients (aged 20 days to 99 years; mean: 70 years). Moreover, another 1.3% of patients with critical COVID-19 and 0.9% of the deceased patients have auto-Abs neutralizing high concentrations of IFN-β. We also show, in a sample of 34,159 uninfected individuals from the general population, that auto-Abs neutralizing high concentrations of IFN-α and/or IFN-ω are present in 0.18% of individuals between 18 and 69 years, 1.1% between 70 and 79 years, and 3.4% >80 years. Moreover, the proportion of individuals carrying auto-Abs neutralizing lower concentrations is greater in a subsample of 10,778 uninfected individuals: 1% of individuals 80 years. By contrast, auto-Abs neutralizing IFN-β do not become more frequent with age. Auto-Abs neutralizing type I IFNs predate SARS-CoV-2 infection and sharply increase in prevalence after the age of 70 years. They account for about 20% of both critical COVID-19 cases in the over 80s and total fatal COVID-19 cases. © 2021 The Authors, some rights reserved.
- Published
- 2021
3. The Relationship between Lichen Planus and Carotid Intima Media Thickness
- Author
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C, Koseoglu, M, Erdogan, G, Koseoglu, O, Kurmus, AG, Ertem, TH, Efe, GI, Kurmus, T, Durmaz, T, Keles, and E, Bozkurt
- Subjects
Brief Report - Abstract
Lichen planus (LP) is a chronic inflammatory disease. Although the association between chronic inflammation and subclinical atherosclerosis has been reported in the literature, the relationship between LP and carotid intima media thickness (CIMT) has not been previously investigated. The aim of this study was to investigate the relationship between LP and CIMT.One hundred eleven LP patients and 105 controls were enrolled in the study. Then, CIMT examination was performed with an ultrasonography device. Cross-sectional associations of LP with CIMT were analyzed using linear regression models adjusted for related confounders.No statistical difference was found between LP and the controls except for the female gender, white blood cell, LDL cholesterol and triglycerides (p = 0.046, p = 0.019, p = 0.011 and p = 0.013, respectively). Significant difference was found between the groups in terms of CIMT (0.90 ± 0.2 mm vs. 0.61 ± 0.3 mm, p = 0.001). CIMT was correlated with longevity of the LP, but we did not find LP to be an independent predictor of increased CIMT in logistic regression analysis (r = 0.449, p0.001, β = -0.117, p = 0.092; respectively).The results of our study suggested that LP was associated with increased mean CIMT, and furthermore that CIMT was correlated with longevity of LP. However, LP was not an independent predictor of increased CIMT.
- Published
- 2016
4. Measurement of Substrate Utilization by 13C Tracer Infusion Technique
- Author
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T Keles, P. Scigalla, W. Park, G. Knoblach, and H. Paust
- Subjects
medicine.medical_specialty ,Chromatography ,Endocrinology ,Chemistry ,Internal medicine ,TRACER ,Infusion technique ,medicine ,Substrate (chemistry) - Published
- 2015
- Full Text
- View/download PDF
5. Reliability and Efficacy of Metoprolol and Diltiazem in Patients Having Mild to Moderate Mitral Stenosis with Sinus Rhythm
- Author
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Mehmet Sıddık Ülgen, Nizamettin Toprak, Kurtulus Ozdemir, T. Keles, and Sait Alan
- Subjects
Adult ,Male ,medicine.medical_specialty ,Time Factors ,medicine.medical_treatment ,Adrenergic beta-Antagonists ,Administration, Oral ,Hemodynamics ,030204 cardiovascular system & hematology ,Antiarrhythmic agent ,Diltiazem ,03 medical and health sciences ,Oxygen Consumption ,0302 clinical medicine ,Heart Rate ,Internal medicine ,Heart rate ,Humans ,Mitral Valve Stenosis ,Medicine ,Sinus rhythm ,030212 general & internal medicine ,Metoprolol ,business.industry ,VO2 max ,Middle Aged ,Calcium Channel Blockers ,Symptomatic relief ,Dyspnea ,Echocardiography ,Data Interpretation, Statistical ,Anesthesia ,Injections, Intravenous ,Exercise Test ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Follow-Up Studies ,circulatory and respiratory physiology ,medicine.drug - Abstract
The authors evaluated the effects of beta blockers (metoprolol) and calcium channel blockers (diltiazem) in patients having mild to moderate mitral stenosis (MS) with sinus rhythm. Eighty patients with a complaint of dyspnea with diagnosed MS were included in this study. Patients were randomized into metoprolol and diltiazem groups. The first group received oral diltiazem treatment for 3 months following an IV dose of 25 mg diltiazem. The second group received oral metoprolol for 3 months following an IV dose of 5 mg metoprolol. All patients performed a treadmill exercise test at the beginning of and after 3 months of treatment. Transthoracic echocardiographic studies were also performed following the IV drug administration and after 3 months of treatment. In addition, oxygen uptakes of patients were measured before and after the stress and after 3 months of treatment. Decreases in peak gradient (PG) and mean transmitral gradient (MG) were observed in the metoprolol group after IV and oral metoprolol treatment. A prolongation of exercise time in treadmill exercise test (TET) and a decrease in the maximum heart rate after oral metoprolol treatment were noted. Eighteen patients in the metoprolol group had benefited symptomatically from this treatment and complaints of dyspnea were alleviated, whereas no symptomatic relief was seen in the diltiazem group. No significant prolongation was observed in effort times (p>0.05) of the diltiazem group. Transmitral gradients measured via echocardiographic examination did not change (p>0.05). With respect to oxygen uptake rates, a statistically significant decrease was determined in the metoprolol group, whereas no difference was found in diltiazem group. The authors conclude that metoprolol may be useful in patients with MS and can provide symptomatic relief. They did not observe any beneficial effect of diltiazem in these patients.
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- 2002
- Full Text
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6. Screening method for the determination of 28 volatile organic compounds in indoor and outdoor air at environmental concentrations using dual-column capillary gas chromatography with tandem electron-capture-flame ionization detection
- Author
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T. Keles, Jutta Begerow, E. Jermann, T. Koch, and Lothar Dunemann
- Subjects
chemistry.chemical_classification ,Chromatography ,Environmental analysis ,Organic Chemistry ,Detector ,Analytical chemistry ,Context (language use) ,General Medicine ,Injector ,Biochemistry ,Analytical Chemistry ,law.invention ,Electron capture detector ,chemistry ,law ,Flame ionization detector ,Volatile organic compound ,Gas chromatography - Abstract
A gas chromatographic method is presented for the simultaneous determination of 28 volatile organic compounds (VOCs) in indoor and outdoor air at environmental concentrations. Using diffusive (passive) samplers, the VOCs were adsorbed onto charcoal during a four-week sampling period and subsequently desorbed with carbon disulphide. After injection, using a cold split-splitness injector, the mobile phase was split via a Y-connector and led onto two capillary columns of different polarity switched in parallel. This dual-column configuration provides additional information about the VOC components and can be obtained for verification purposes. Detection was in both cases performed by connecting each column with a non-destructive electron-capture detector and a flame ionization detector switched in series. By this procedure sensitivity is increased because no effluent splitting is required. At the same time, sample throughput is enhanced drastically since several items of information are obtained simultaneously. The procedure has been successfully applied in the context of a large field study to measure outdoor air concentrations in three areas with different traffic density. It is applicable to indoor air measurements in like manner.
- Published
- 1996
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7. Passive sampling for volatile organic compounds (VOCs) in air at environmentally relevant concentration levels
- Author
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U. Ranft, E. Jermann, J. Begerow, Lothar Dunemann, and T. Keles
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Carbon disulfide ,Chromatography ,Biochemistry ,Toluene ,Analytical Chemistry ,law.invention ,chemistry.chemical_compound ,Electron capture detector ,Adsorption ,chemistry ,law ,Environmental chemistry ,Flame ionization detector ,Gas chromatography ,Benzene ,Trichloroethane - Abstract
A sensitive and reliable method is described for the determination of aromatic and chlorinated hydrocarbons (benzene, toluene, o-, m-, p-xylene, trichloromethane, trichloroethane, trichloroethene and tetrachloroethene) in indoor and outdoor air at environmental concentration levels. The procedure can be easily extended to other VOCs. Using passive samplers the VOCs have been adsorbed onto charcoal during a four-week sampling period and subsequently desorbed with carbon disulfide. After injection with a cold split-splitless multi-injector the VOCs have been separated by capillary gas chromatography. Quantification has been achieved using an electron capture detector (ECD) and a flame ionization detector (FID) switched in series. A limit of about 1 μg/m3 for aromatic hydrocarbons and of about 0.01 μg/m3 for chlorinated hydrocarbons has been obtained. The procedure has been successfully applied in the framework of a field study to measure indoor and outdoor air concentrations in Essen and Borken, two differently polluted areas of Northrhine-Westphalia.
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- 1995
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8. Increased levels of high sensitive C-reactive protein in patients with chronic rheumatic valve disease: evidence of ongoing inflammation
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Erdem Diker, Ahmet Şahin, Zehra Gölbaşı, T. Keles, Sinan Aydogdu, Kerim Cagli, Özgül Uçar, and Ahmet Camsari
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Heart disease ,Heart Valve Diseases ,Inflammation ,Disease ,Malignancy ,Gastroenterology ,Internal medicine ,medicine ,Humans ,Myocardial infarction ,Aged ,Evidence-Based Medicine ,biology ,business.industry ,C-reactive protein ,Rheumatic Heart Disease ,Middle Aged ,medicine.disease ,C-Reactive Protein ,Cross-Sectional Studies ,Aortic Valve ,Heart Valve Prosthesis ,Heart failure ,Chronic Disease ,Disease Progression ,Cardiology ,biology.protein ,Mitral Valve ,Rheumatic fever ,Female ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Biomarkers ,Follow-Up Studies - Abstract
The precise pathogenetic mechanism(s) of rheumatic fever and rheumatic heart disease have never been defined. C-reactive protein (CRP) is increased in patients with acute rheumatic fever, but it is not known whether plasma levels increase in patients with chronic rheumatic valve disease. The aim of this study was to determine the role of inflammation detected by high sensitivity CRP (hs-CRP) levels in the progression of chronic rheumatic valve disease. A total of 113 patients with chronic rheumatic valve disease (81 women, 32 men; mean age 40+/-14 years, range 13-70), 51 patients with prosthetic valve(s) (31 women, 20 men; mean age 48+/-13 years, range 21-71) and 102 healthy subjects (68 women, 34 men, mean age 41+/-12 years, range 25-73), as a control group, were assessed. Patients with acute rheumatic fever, acute infection, inflammatory disease, malignancy, acute myocardial infarction and trauma were excluded. hs-CRP was determined using latex-enhanced immunonephelometric assays on a BN II analyzer (Behring). Transthoracic echocardiography was performed in all patients in order to evaluate valvular disease. Levels of hs-CRP were significantly higher in patients with chronic rheumatic heart disease than in patients with prosthetic valve(s) and healthy subjects (0.62+/-0.64 vs. 0.35+/-0.41 vs. 0.24+/-0.18 mg/l, P
- Published
- 2002
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9. Relation of homocysteine levels with patency and flow rate of infarct-related artery in patients receiving fibrinolytic therapy
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Nihal Akar Bayram, T. Keles, Tahir Durmaz, Engin Bozkurt, Hüseyin Ayhan, Murat Akçay, and Ekrem Yeter
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medicine.medical_specialty ,Chest Pain ,Homocysteine ,medicine.medical_treatment ,Myocardial Infarction ,Chest pain ,Logistic regression ,Coronary Angiography ,chemistry.chemical_compound ,Fibrinolytic Agents ,Internal medicine ,Occlusion ,Fibrinolysis ,medicine ,Humans ,Chromatography, High Pressure Liquid ,business.industry ,Patient Selection ,Thrombolysis ,medicine.anatomical_structure ,chemistry ,Cardiology ,Regression Analysis ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,TIMI ,Biomarkers ,Blood Flow Velocity ,Artery - Abstract
Objective Elevated homocysteine levels induce a hypercoagulable state and make the clot more resistant to fibrinolysis. In this prospective observational study, we investigated the influence of homocysteine levels on infarct-related artery (IRA) patency and flow as determined with regard to thrombolysis in myocardial infraction (TIMI) flow grade and corrected TIMI frame count (CTFC). Methods Sixty-one patients who received fibrinolytic therapy for a first ST elevation myocardial infarction (STEMI) within 12 hours of chest pain were included. Coronary angiography was performed according to the Judkins technique within 72 hours after fibrinolytic therapy. Total plasma homocysteine level was determined by the high-performance liquid chromatography method with fluorescence detection. Statistical analysis was performed using Chi-square, Student's t and Pearson correlation tests. Logistic regression analysis was used to determine the predictors of IRA occlusion. Results Of the 61 patients, 22 (36.1%) had an occluded IRA (group 1), 39 (63.9%) had a patent IRA (group 2). Mean plasma homocysteine levels were found to be significantly higher in the group 1 compared to the group 2 (18.5±9.6 µmol/L vs 14.3±5 µmol/L, p=0.04). In addition, we found a significant positive correlation between CTFC and plasma homocysteine levels (r=0.415; p=0.01). In multiple logistic regression analysis, high levels of plasma homocysteine (OR=1.2; 95% CI 1.1-1.25; p=0.03) and being a non-smoker (OR=5.9; 95% CI 1.1-31.6; p=0.03) were found to be significant independent predictors of having an occluded IRA. Conclusion There is an inverse relation between plasma homocysteine levels and IRA patency and flow in patients receiving fibrinolytic therapy for STEMI.
- Published
- 2010
10. Evaluation of risk factors in predicting coronary artery disease in patients with left bundle branch block
- Author
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Gökhan Bektaşoğlu, T Durmaz, I. Tandogan, H Sezer, Okan Onur Turgut, T Keles, Şinasi Manduz, [Bektasoglu, G. -- Turgut, O. -- Manduz, S. -- Sezer, H. -- Tandogan, I.] Cumhuriyet Univ, Fac Med, TR-58140 Sivas, Turkey -- [Keles, T. -- Durmaz, T.] Ataturk Educ & Res Hosp, Ankara, Turkey, and Turgut, Okan -- 0000-0002-6847-3029
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Male ,medicine.medical_specialty ,Bundle-Branch Block ,CAD ,LEFT BUNDLE BRANCH BLOCK (LBBB) ,Coronary Artery Disease ,Biochemistry ,Coronary artery disease ,Angina ,Risk Factors ,Total cholesterol ,Internal medicine ,medicine ,Confidence Intervals ,Humans ,In patient ,cardiovascular diseases ,Family history ,PREDICTORS ,Aged ,Demography ,business.industry ,Left bundle branch block ,Biochemistry (medical) ,CORONARY ARTERY DISEASE (CAD) ,Retrospective cohort study ,Cell Biology ,General Medicine ,medicine.disease ,Prognosis ,RISK FACTORS ,Cardiology ,Regression Analysis ,Female ,business - Abstract
WOS: 000268692900025, PubMed ID: 19589265, This retrospective study examined whether classical risk factors for coronary artery disease (CAD) could also be used to predict CAD in patients with left bundle branch block (LBBB). Clinical and demographic features were studied in patients with/without CAD who presented with LBBB on their surface electrocardiograms and had undergone coronary angiography. Of the 312 patients with LBBB, 161 (51.6%) had CAD. Patients with CAD were more likely to be older, male, have CAD risk factors and to be taking acetylsalicylic acid or angiotensin-converting enzyme inhibitors. A model with six independent variables (family history, smoking, angina, advanced age, hypertension and total cholesterol levels) was statistically significant in predicting CAD in patients with LBBB, with an ability to predict patients with and without CAD of 87.1% and 90.6%, respectively. Predictors of CAD in patients with LBBB are consistent with classical risk factors and may help the accurate prediction of patients with CAD.
- Published
- 2009
11. OP-276 IS THERE ASSOCIATION BETWEEN ACUTE CORONARY SYNDROMES AND LEVELS OF PROSTATE SPESIFIC ANTIGEN
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Nihal Akar Bayram, C. Sari, Erol Rüştü Bozkurt, Emine Bilen, Hüseyin Ayhan, Tahir Durmaz, Murat Akçay, and T. Keles
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Oncology ,medicine.medical_specialty ,medicine.anatomical_structure ,Antigen ,Prostate ,business.industry ,Internal medicine ,medicine ,Cardiology and Cardiovascular Medicine ,business - Published
- 2012
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12. OP-074 THE ASSOCIATION BETWEEN PARAOXONASE ACTIVITY AND AORTIC STIFFNESS PARAMETERS
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Nihal Akar Bayram, Erol Rüştü Bozkurt, Emine Bilen, N. Cay, T. Keles, Murat Akçay, Tahir Durmaz, and Hüseyin Ayhan
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medicine.medical_specialty ,business.industry ,Internal medicine ,Paraoxonase activity ,medicine ,Cardiology ,Aortic stiffness ,Cardiology and Cardiovascular Medicine ,business - Published
- 2012
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13. QT dispersion in single coronary artery disease: is there a relation between QT dispersion and diseased coronary artery or lesion localization?
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Mustafa Soylu, T. Keles, Ahmet Duran Demir, Yücel Balbay, Hakan Tikiz, Tural Terzi, and Emine Kütük
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Adult ,Male ,medicine.medical_specialty ,Infarction ,Coronary Disease ,030204 cardiovascular system & hematology ,Coronary Angiography ,QT interval ,Lesion ,Coronary artery disease ,03 medical and health sciences ,0302 clinical medicine ,Heart Conduction System ,Internal medicine ,medicine.artery ,Medicine ,Humans ,030212 general & internal medicine ,Myocardial infarction ,Observer Variation ,medicine.diagnostic_test ,business.industry ,Middle Aged ,medicine.disease ,medicine.anatomical_structure ,Right coronary artery ,Cardiology ,Exercise Test ,Female ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Electrocardiography ,Artery - Abstract
It has been shown that QT dispersion (QTD) increases during episodes of myocardial ischemia or infarction. However, no extensive data on the relation between the diseased coronary artery or the localization of stenosis and the QTD are available. The aim of the study was to examine the relation between QTD and diseased coronary artery and lesion localization during exercise stress test in patients with single coronary artery disease without prior myocardial infarction. One hundred nineteen patients with single coronary artery disease and 53 patients with normal coronary arteries were enrolled in study. All patients underwent exercise stress test with modified Bruce protocol, and QT interval parameters were measured at rest and at minute 2 of the recovery (rec-2) period. QT dispersion at rest was found higher in all single-vessel disease groups compared with that in the control group, and corrected QT dispersion at rec-2 period was also markedly higher in left anterior descending, circumflex, and right coronary artery groups compared with that in the control group. No relation was found between QT dispersion and diseased coronary artery or the lesion localization. In conclusion, no qualitative difference was found between QT dispersion and diseased coronary artery or proximal or distal lesion localization. However, it was observed that patients with single-vessel disease had wider baseline QT dispersion as compared with that in the control group, which further increased significantly with exercise. This finding supports the idea that severity of localized ischemia rather than extent of coronary artery disease would be expected to have a greater effect on inducible QT dispersion.
- Published
- 2001
14. Increased nitric oxide in exhaled air in patients with rheumatic heart disease
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Deniz Erbaş, T. Keles, Sinan Aydogdu, Belgizar Ugurlu, Hakan Bayol, Sibel Dinçer, Dilek Cicek, and Zehra Gölbaşl
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Adult ,Male ,medicine.medical_specialty ,Heart disease ,Hypertension, Pulmonary ,Nitric Oxide ,Statistics, Nonparametric ,Nitric oxide ,chemistry.chemical_compound ,Internal medicine ,medicine.artery ,medicine ,Humans ,Lung ,Aged ,Aged, 80 and over ,Mitral regurgitation ,Chi-Square Distribution ,business.industry ,Rheumatic Heart Disease ,Middle Aged ,medicine.disease ,Pulmonary hypertension ,Blood pressure ,chemistry ,Echocardiography ,Heart failure ,Case-Control Studies ,Exhaled nitric oxide ,Pulmonary artery ,Luminescent Measurements ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background: Endogenous production of nitric oxide and its presence in exhaled air was observed in humans. Prior studies have yielded contrasting information about the production of nitric oxide in patients with heart failure. Aims: The aim of this study was to measure nitric oxide in the exhaled air of patients with chronic rheumatic heart disease with and without pulmonary hypertension. Methods: Seventy-four patients (6 patients had isolated mitral stenosis; 13 patients had combined mitral stenosis and mitral regurgitation; 1 patient had isolated mitral regurgitation; 54 patients had combined mitral and aortic valve disease) and 27 healthy subjects were entered in the study. The nitric oxide concentration in exhaled air was determined with a chemiluminescence analyser. Echocardiography was performed in all patients to assess the severity of the valve disease and for the measurement of pulmonary artery pressure. Results: The level of exhaled nitric oxide was significantly greater in patients with rheumatic heart disease than in controls. The value of nitric oxide concentration in exhaled air was significantly increased in patients with pulmonary hypertension, as compared with patients who had normal pulmonary artery systolic pressure. Conclusion: We found increased nitric oxide in the exhaled air in patients with rheumatic heart disease, especially in those with pulmonary hypertension, compared with healthy patients. (C) 2001 European Society of Cardiology. All rights reserved.
- Published
- 2000
15. A case of Brucella endocarditis in association with superficial femoral artery thrombus
- Author
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Mehmet A Tasyaran, R Caylan, Şiran Keske, T Keles, and T Durmaz
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Adult ,Male ,medicine.medical_specialty ,Brucella ,Femoral artery ,Brucellosis ,medicine.artery ,Humans ,Medicine ,Endocarditis ,Clinical significance ,cardiovascular diseases ,Thrombus ,Aspirin ,biology ,business.industry ,Public Health, Environmental and Occupational Health ,Thrombosis ,Endocarditis, Bacterial ,medicine.disease ,biology.organism_classification ,Anti-Bacterial Agents ,Surgery ,Femoral Artery ,Infectious Diseases ,Echocardiography ,cardiovascular system ,Platelet aggregation inhibitor ,Radiology ,business ,Platelet Aggregation Inhibitors - Abstract
We report here a case of Brucella endocarditis associated with superficial femoral artery thrombus. The patient was treated only with medical treatment. The clinical significance of the case was the presence of two rare complications of brucellosis:endocarditis and arterial thrombus.
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- 2009
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16. OP-137 THE RELATIONSHIP BETWEEN ACUTE CORONARY SYNDROME AND STRESS HYPERGLYCEMIA
- Author
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Emine Bilen, Hüseyin Ayhan, T. Keles, Erol Rüştü Bozkurt, Nihal Akar Bayram, Hacı Ahmet Kasapkara, C. Sari, Tahir Durmaz, and Murat Akçay
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medicine.medical_specialty ,Acute coronary syndrome ,business.industry ,Internal medicine ,medicine ,Cardiology ,Cardiology and Cardiovascular Medicine ,Stress hyperglycemia ,medicine.disease ,business - Published
- 2013
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17. Internal and external tetrachloroethene exposure of persons living in differently polluted areas of Northrhine-Westphalia (Germany)
- Author
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J, Begerow, E, Jermann, T, Keles, I, Freier, U, Ranft, and L, Dunemann
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Male ,Air Pollutants ,Tetrachloroethylene ,Urban Population ,Environmental Exposure ,Middle Aged ,Air Pollution, Indoor ,Child, Preschool ,Germany ,Solvents ,Humans ,Female ,Child ,Environmental Monitoring - Abstract
An epidemiological study was performed to measure the internal and external tetrachloroethene exposure of persons living in two differently polluted areas of Northrhine-Westphalia (Germany). Tetrachloroethene concentrations were determined in venous blood samples of 5- to 7-year-old children (n = 81) and 55-year-old women (n = 91) living in Essen, an industrial city located in the Ruhr area. 103 children und 131 women of the same age living in Borken, a small town north of the Ruhr area, served as reference group. Outdoor air samples were collected on passive samplers (sampling period: 4 weeks) from 70 measurement points per study area (about 2 km2, mean distance 100 m). In the course of a year these measurements were repeated three times to cover seasonal variations. Parallel to the outdoor measurement periods, indoor air concentrations were determined in the homes of those women from Essen and Borken, who donored a blood sample. Tetrachloroethene levels in blood were generally low with a geometric mean of 0.05 microgram/L in women and 0.021 microgram/L in children. Nevertheless, children and women living in the industrial area were found to have significantly higher tetrachloroethene levels in blood than those of the reference group. In both study areas blood levels of women exceeded those of children by a factor of 2. Participants living in the neighbourhood of a dry-cleaning shop had distinctly elevated blood levels. The same applied to persons who stored dry-cleaned clothes at home. Like the internal exposure, external exposure was also higher in Essen than in Borken. In both areas tetrachloroethene concentrations indoors exceeded those outdoors. Outdoor tetrachloroethence concentrations were significantly increased during the cold season, while the opposite was true for indoor levels. The correlation between indoor and outdoor exposure was found to be significant, while those between blood levels and outdoor exposure became only significant when people living next to a dry-cleaning shop were excluded. No significant relationship was observed between blood and indoor tetrachlorethene levels. It is concluded that the higher tetrachloroethene blood levels of the urban population result from the higher atmospheric concentrations in industrial areas with tetrachloroethene emitting sources like metal and textile industry. The fact that indoor air tetrachloroethene levels exceeded those outdoors can only be explained by the presence of additional indoor sources. Provided that women spend on average more time indoors than children the higher indoor air concentrations may be the reason for the higher blood tetrachloroethene levels found in women. Persons living near a dry-cleaning shop or storing dry-cleaned clothes at home showed a higher internal and external exposure to tetrachloroethene than other persons. In individual cases it can by far exceed the average exposure of the general population, so that health impairments can not be generally excluded.
- Published
- 1996
18. Balanced Anesthesia with Dexmedetomidine added Desflurane or Sevoflurane in Spinal Surgery
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T. Keles, Gonul, primary and Ozer, Mert, additional
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- 2012
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19. PP-038 MEAN PLATELET VOLUME IS INCREASED IN PATIENTS WITH MYOCARDIAL BRIDGE
- Author
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Hüseyin Ayhan, Erol Rüştü Bozkurt, Umran Koçak, Ibrahim Halil Tanboga, T. Keles, Emine Bilen, and Mustafa Kurt
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Myocardial bridge ,medicine.medical_specialty ,business.industry ,Internal medicine ,medicine ,Cardiology ,In patient ,Mean platelet volume ,Cardiology and Cardiovascular Medicine ,business - Published
- 2012
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20. OP-073 THE ASSOCIATION BETWEEN PARAOXONASE ACTIVITY AND NOCTURNAL BLOOD PRESSURE PROFILE
- Author
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Nihal Akar Bayram, T. Keles, Hüseyin Ayhan, Tahir Durmaz, Emine Bilen, Erol Rüştü Bozkurt, and Murat Akçay
- Subjects
medicine.medical_specialty ,Endocrinology ,business.industry ,Internal medicine ,Paraoxonase activity ,Medicine ,Cardiology and Cardiovascular Medicine ,business ,Nocturnal blood pressure - Published
- 2012
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21. PP-215 ASSOCIATION OF ADMISSION MEAN PLATELET VOLUME WITH INFARCT RELATED CORONARY ARTERY PATENCY IN PATIENTS WITH ST SEGMENT ELEVATION MYOCARDIAL INFARCTION
- Author
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T. Keles, Emine Bilen, Mustafa Kurt, Umran Koçak, Ibrahim Halil Tanboga, A. Akdi, and Erol Rüştü Bozkurt
- Subjects
medicine.medical_specialty ,Coronary artery patency ,business.industry ,Elevation ,medicine.disease ,Internal medicine ,medicine ,Cardiology ,ST segment ,In patient ,Myocardial infarction ,Mean platelet volume ,Cardiology and Cardiovascular Medicine ,business - Published
- 2012
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22. PP-011 PARAOXONASE ACTIVITY IS ASSOCIATED WITH THE PRESENCE OF CORONARY CALCIUM
- Author
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T. Keles, Nihal Akar Bayram, Erol Rüştü Bozkurt, Hüseyin Ayhan, Tahir Durmaz, Emine Bilen, N. Cay, and Murat Akçay
- Subjects
medicine.medical_specialty ,Endocrinology ,business.industry ,Internal medicine ,Paraoxonase activity ,medicine ,Coronary calcium ,Cardiology and Cardiovascular Medicine ,business - Published
- 2012
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23. PP-118: ASSESSMENT OF P-WAVE DISPERSION IN PATIENTS WITH ISOLATED BICUSPID AORTIC VALVE WITHOUT SIGNIFICANT VALVE DYSFUNCTION
- Author
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T. Keles, Mustafa Kurt, Engin Bozkurt, H.I. Tanboga, N. Akar Bayram, Murat Akçay, Tahir Durmaz, E. Bilen Senkaya, Serdal Baştuğ, C. Sari, and Umran Koçak
- Subjects
P wave dispersion ,medicine.medical_specialty ,Bicuspid aortic valve ,business.industry ,Internal medicine ,medicine ,Cardiology ,In patient ,Cardiology and Cardiovascular Medicine ,medicine.disease ,business - Published
- 2011
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24. PP-319: ARRHYTHMOGENIC RIGHT VENTRICULAR DISPLASIA WITH LEFT VENTRICULAR INVOLVEMENT
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T. Keles, A. Akdi, Emine Bilen, N. Akar Bayram, and Engin Bozkurt
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medicine.medical_specialty ,business.industry ,Internal medicine ,medicine ,Cardiology ,Cardiology and Cardiovascular Medicine ,business ,Left ventricular involvement - Published
- 2011
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25. PP-119: RELATION BETWEEN AORTIC DIMENSIONS, AORTIC ELASTICITY AND LEFT VENTRICULAR FILLING AND DIASTOLIC PARAMETERS IN PATIENTS WITH ISOLATED BICUSPID AORTIC VALVE WITHOUT SIGNIFICANT VALVE DYSFUNCTION
- Author
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T. Keles, H.I. Tanboga, Murat Akçay, Mustafa Kurt, N. Akar Bayram, Tahir Durmaz, Umran Koçak, C. Sari, Engin Bozkurt, Serdal Baştuğ, and E. Bilen Senkaya
- Subjects
medicine.medical_specialty ,business.industry ,Diastole ,medicine.disease ,Bicuspid aortic valve ,Afterload ,Internal medicine ,medicine ,Ventricular pressure ,Cardiology ,In patient ,Cardiology and Cardiovascular Medicine ,business ,Ventricular filling ,Aortic elasticity - Published
- 2011
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26. ECU controlled intelligent lift axle dropping and lifting system for heavy trucks
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T. Keleş, L. Güvenç, and E. Altuğ
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Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This paper reports the design and control of an automatic lift axle auto-drop system that is normally controlled manually by the driver. The goal of the automatic lift axle dropping system is to drop or lower one or more of the liftable axles of the truck automatically, based on loading and other conditions. In this paper, the experimental implementation of an AutoDrop system in a truck suspended with a compensating arm type mechanical suspension is presented. Axle weight estimation for a compensating arm type suspension has challenges because of the articulated nature of the suspension mechanism and the presence of a large hysteresis characteristic. This paper introduces an analysis and higher accuracy height sensor based estimation method for weight determination in axles with a compensating arm suspension. An improved algorithm is developed and the lift axle system operation is automated to satisfy the rules mentioned in EU Directive 1230/2012 EEC. The developed algorithm is coded and implemented using an electronic control unit mounted in the vehicle cabin. Experimental results are used to demonstrate the successful implementation of the developed algorithm. Keywords: Auto-drop, Lift axle dropping, Truck suspension
- Published
- 2019
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27. [Significance of bicarbonate kinetics for 13CO2 respiratory gas analysis]
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T, Keles, H, Paust, W, Park, and G, Knoblach
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Bicarbonates ,Pulmonary Gas Exchange ,Humans ,Carbon Radioisotopes ,Carbon Dioxide ,Energy Metabolism - Published
- 1990
28. FATTY ACID OXIDATION IN ARTIFICIALLY FED INFANTS DURING CONTINUOUS INFUSION OF 13C-TRIOCTANOIN AND 13C-TRIOLEIN
- Author
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H Brösicke, H. Paust, W Park, G. Knoblach, Hans Helge, and T Keles
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chemistry.chemical_compound ,Chromatography ,Biochemistry ,Chemistry ,Continuous infusion ,Pediatrics, Perinatology and Child Health ,lipids (amino acids, peptides, and proteins) ,Triolein ,Beta oxidation - Abstract
FATTY ACID OXIDATION IN ARTIFICIALLY FED INFANTS DURING CONTINUOUS INFUSION OF 13 C-TRIOCTANOIN AND 13 C-TRIOLEIN
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- 1987
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29. Predictors and Prognostic Implications of Myocardial Injury After Transcatheter Aortic Valve Replacement.
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Guney MC, Keles T, Karaduman BD, Ayhan H, Suygun H, Kahyaoglu M, and Bozkurt E
- Subjects
- Aged, Aged, 80 and over, Aortic Valve diagnostic imaging, Aortic Valve surgery, Female, Humans, Prognosis, Retrospective Studies, Risk Assessment, Risk Factors, Treatment Outcome, Aortic Valve Stenosis diagnosis, Aortic Valve Stenosis etiology, Aortic Valve Stenosis surgery, Heart Injuries diagnosis, Heart Injuries epidemiology, Heart Injuries etiology, Transcatheter Aortic Valve Replacement adverse effects, Transcatheter Aortic Valve Replacement methods
- Abstract
Myocardial injury (MI) is not unusual after transcatheter aortic valve replacement (TAVR). To determine precipitating factors and prognostic outcomes of MI after TAVR, we retrospectively investigated relationships between MI after TAVR and aortic root dimensions, baseline patient characteristics, echocardiographic findings, and procedural features. Of 474 patients who underwent transfemoral TAVR for severe aortic stenosis in our tertiary center from June 2011 through June 2018, 188 (mean age, 77.7 ± 7.7 yr; 96 women [51%]) met the study inclusion criteria. Patients were divided into postprocedural MI (PMI) (n=74) and no-PMI (n=114) groups, in accordance with high-sensitivity troponin T levels. We found that MI risk was associated with older age (odds ratio [OR]=1.054; 95% CI, 1.013-1.098; P=0.01), transcatheter heart valve type (OR=10.207; 95% CI, 2.861-36.463; P=0.001), distances from the aortic annulus to the right coronary artery ostium (OR=0.853; 95% CI, 0.731-0.995; P=0.04) and the left main coronary artery ostium (OR=0.747; 95% CI, 0.616-0.906; P=0.003), and baseline glomerular filtration rate (OR=0.985; 95% CI, 0.970-1.000; P=0.04). Moreover, the PMI group had a longer time to hospital discharge (P=0.001) and a higher permanent pacemaker implantation rate (P=0.04) than did the no-PMI group. Our findings may enable better estimation of which patients are at higher risk of MI after TAVR and thus improve the planning and course of clinical care., (© 2022 by the Texas Heart® Institute, Houston.)
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- 2022
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30. Pacemaker-associated superior vena cava syndrome: Role of contrast echocardiography.
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Akin Y, Cagli K, Okten RS, Keles T, and Golbasi Z
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- Echocardiography, Echocardiography, Transesophageal, Humans, Vena Cava, Superior diagnostic imaging, Pacemaker, Artificial adverse effects, Superior Vena Cava Syndrome diagnostic imaging, Superior Vena Cava Syndrome etiology
- Abstract
Pacemaker-associated superior vena cava (SVC) syndrome is increasingly recognized as a nonmalignant type of SVC syndrome. Computed tomographic (CT) angiography is the first choice of imaging for diagnosis but in some cases there is discrepancy between the clinical findings and CT images. In this report we present the role of contrast study with transesophageal echocardiography in a patient with suspicion of SVC syndrome but inconclusive CT findings., (© 2022 Wiley Periodicals LLC.)
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- 2022
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31. Recent studies of nitrogen containing heterocyclic compounds as novel antiviral agents: A review.
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Mermer A, Keles T, and Sirin Y
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- Antiviral Agents chemical synthesis, Antiviral Agents chemistry, Heterocyclic Compounds chemical synthesis, Heterocyclic Compounds chemistry, Humans, Microbial Sensitivity Tests, Nitrogen chemistry, Antiviral Agents pharmacology, Heterocyclic Compounds pharmacology, Nitrogen pharmacology, Viruses drug effects
- Abstract
N-heterocycles are important, not only because of their abundance, but above all because of their chemical, biological and technical significance. They play an important role in biological investigation such as anticancer, antiinflammatory, antibacterial, antiviral, anti-tumor, antidiabetic, etc. In this study, we focused on examining synthesized some 5- or 6-ring N-heterocyclic compounds that showed the antiviral activity in last 5 years, and investigation of these compounds structure-activity relationship studies. This review will be useful to scientists in research fields of organic synthesis, medicinal chemistry, and pharmacology., (Copyright © 2021 Elsevier Inc. All rights reserved.)
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- 2021
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32. The Relationship between Lichen Planus and Carotid Intima Media Thickness.
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C K, M E, G K, O K, Ag E, Th E, Gi K, T D, T K, and E B
- Abstract
Background: Lichen planus (LP) is a chronic inflammatory disease. Although the association between chronic inflammation and subclinical atherosclerosis has been reported in the literature, the relationship between LP and carotid intima media thickness (CIMT) has not been previously investigated. The aim of this study was to investigate the relationship between LP and CIMT., Methods: One hundred eleven LP patients and 105 controls were enrolled in the study. Then, CIMT examination was performed with an ultrasonography device. Cross-sectional associations of LP with CIMT were analyzed using linear regression models adjusted for related confounders., Results: No statistical difference was found between LP and the controls except for the female gender, white blood cell, LDL cholesterol and triglycerides (p = 0.046, p = 0.019, p = 0.011 and p = 0.013, respectively). Significant difference was found between the groups in terms of CIMT (0.90 ± 0.2 mm vs. 0.61 ± 0.3 mm, p = 0.001). CIMT was correlated with longevity of the LP, but we did not find LP to be an independent predictor of increased CIMT in logistic regression analysis (r = 0.449, p < 0.001, β = -0.117, p = 0.092; respectively)., Conclusions: The results of our study suggested that LP was associated with increased mean CIMT, and furthermore that CIMT was correlated with longevity of LP. However, LP was not an independent predictor of increased CIMT.
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- 2016
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33. Neutrophil Lymphocyte Ratio as a Predictor of Left Ventricular Apical Thrombus in Patients with Myocardial Infarction.
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Ertem AG, Ozcelik F, Kasapkara HA, Koseoglu C, Bastug S, Ayhan H, Sari C, Akar Bayram N, Bilen E, Durmaz T, Keles T, and Bozkurt E
- Abstract
Background and Objectives: In this study, we examined the role of inflammatory parameters in an apical mural thrombus with a reduced ejection fraction due to large anterior myocardial infarction (MI)., Subjects and Methods: A total of 103 patients who had suffered from heart failure, 45 of whom had left ventricular apical thrombus (AT) after a large anterior MI, were enrolled in the study. A detailed clinical history was taken of each participant, biochemical inflammatory markers, which were obtained during admission, were analyzed and an echocardiographical and angiographical evaluation of specific parameters were performed., Results: There were no statistically significant differences in terms of age, gender, and history of hypertension, diabetes mellitus, and atrial fibrillation between both groups (p>0.05). Similarly there were no statistically significant differences in terms of biochemical and echocardiographic parameters (p>0.05). However, there were significant differences in terms of neutrophil lymphocyte ratio (p=0.032). After a multivariate regression analysis, neutrophil lymphocyte ratio (NLR) was an independent predictor of thrombus formation (β: 0.296, p=0.024). The NLR >2.74 had a 78% sensivity and 61% specifity in predicting thrombus in patients with a low left ventricular ejection fraction., Conclusion: In this study, neutrophil lymphocyte ratios were significantly higher in patients with apical thrombus., Competing Interests: The authors have no financial conflicts of interest.
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- 2016
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34. Epicardial fat tissue thickness is increased in patients with lichen planus and is linked to inflammation and dyslipidemia.
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Ertem AG, Erdogan M, Koseoglu C, Akoglu G, Ozdemir E, Koseoglu G, Sivri S, Keles T, Durmaz T, Aktas A, and Bozkurt E
- Subjects
- Adult, Aged, Atherosclerosis etiology, C-Reactive Protein analysis, Case-Control Studies, Echocardiography, Female, Humans, Lymphocyte Count, Male, Middle Aged, Pericardium, Platelet Count, Adipose Tissue pathology, Dyslipidemias etiology, Inflammation etiology, Lichen Planus complications, Lichen Planus pathology
- Abstract
Background and Objectives: Lichen planus (LP) is a mucocutaneous inflammatory disease. Inflammation plays a major role in the progression of atherosclerosis. Epicardial fat tissue (EFT) has been shown to produce and secrete various proatherogenic and proinflammatory hormones and cytokines. The aim of this study was to assess EFT in patients with lichen planus., Methods: Fifty-four patients with LP and 50 controls were enrolled in the study. LP was diagnosed according to the World Health Organization criteria. EFT was measured on the free wall of the right ventricle in parasternal long-axis view, as previously described and validated., Results: There were positive correlations between EFT thickness and platelet/lymphocyte ratio, neutrophil/lymphocyte ratio, duration of LP, and high-sensitivity C-reactive protein (hsCRP) (p<0.001, p<0.001, p=0.002 and p<0.001, respectively). In multivariate analysis, after adjustments for relevant confounders, LDL cholesterol, hsCRP, platelet/lymphocyte ratio and duration of LP were independent predictors of EFT thickness in patients with LP (β=0.231, p=0.014; β=0.205, p=0.037; β=0.361, p=0.001 and β=0.133, p=0.047, respectively)., Conclusion: EFT is increased in patients with LP compared to control subjects. Duration of LP is correlated with EFT, and duration of LP is also an independent predictor of increased EFT, which is a predictor of subclinical atherosclerosis., (Copyright © 2016 Sociedade Portuguesa de Cardiologia. Publicado por Elsevier España, S.L.U. All rights reserved.)
- Published
- 2016
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35. The evaluation of left ventricular functions with tissue doppler echocardiography in adults with celiac disease.
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Akin FE, Sari C, Ozer-Sari S, Demirezer-Bolat A, Durmaz T, Keles T, Ersoy O, and Bozkurt E
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- Adult, Cardiovascular Diseases diagnostic imaging, Celiac Disease diagnostic imaging, Female, Humans, Male, Risk Factors, Young Adult, Cardiovascular Diseases physiopathology, Celiac Disease physiopathology, Echocardiography, Doppler methods, Ventricular Function, Left physiology
- Abstract
Background/aim: The aim of this study was to investigate the effects of celiac disease on cardiac functions using tissue Doppler echocardiography (TDE)., Patients and Methods: The study included 30 patients with celiac disease (CD) and 30 healthy volunteers. Echocardiographic examinations were assessed by conventional echocardiography and tissue Doppler imaging. The peak systolic velocity (S'm), early diastolic myocardial peak velocity (E'm), late diastolic myocardial peak velocity (A'm), E'm/A'm ratio, myocardial precontraction time (PCT'm), myocardial contraction time (CT'm), and myocardial isovolumetric relaxation time (IVRT'm), E to E'm ratio were measured., Results: In pulsed wave Doppler echocardiography, mitral late diastolic flow (A) velocity and E to E'm ratio were significantly higher (P = 0.02 and P = 0,017), E/A ratio was significantly lower (P = 0.008) and IVRT was significantly prolonged (P = 0.014) in patients with CD. In TDE, S'm, E'm, and E'm/A'm ratio were significantly lower, IVRT'm was longer (P = 0.009) from septal mitral annulus and S'm, E'm, E'm/A'm ratio were significantly lower, PCT'm, PCT/ET ratio, IVRT'm were longer, and MPI was higher from lateral mitral annulus in celiac group than controls., Conclusion: Our study confirms that patients with CD have impaired diastolic function. More importantly, we also demonstrated an impairment of myocardial systolic function in patients with CD by TDE. We recommend using TDE in addition to conventional echocardiography parameters for the cardiovascular risk assessment of patients with CD.
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- 2016
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36. Forced expiratory volume in one second can predict SYNTAX score in patients with chronic obstructive pulmonary disease.
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Koseoglu C, Kurmus O, Ertem AG, Colak B, Kırbas O, Bilen E, Durmaz T, Keles T, and Bozkurt E
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- Aged, Coronary Angiography, Coronary Artery Bypass, Coronary Artery Disease complications, Female, Humans, Male, Middle Aged, Percutaneous Coronary Intervention, Prognosis, ROC Curve, Coronary Artery Disease diagnosis, Forced Expiratory Volume, Pulmonary Disease, Chronic Obstructive complications
- Abstract
Background: The SYNTAX score is an angiographic score that predicts coronary artery disease (CAD) complexity. It has been shown to be useful for decision making about percutaneous coronary intervention or coronary artery bypass grafting among patients with CAD. Higher SYNTAX scores are indicative of more complex disease. Chronic obstructive pulmonary disease (COPD) is characterised by limitation of airflow. Measurement of forced expiratory volume in one second (FEV1) in spirometry is used for diagnosis and to determine the severity of the disease., Aim: To evaluate the relationship between FEV1 and SYNTAX score in patients with COPD., Methods: Seventy-eight patients with a previous diagnosis of COPD and 48 patients without COPD were enrolled. Spirometry and coronary angiography were performed in all patients. SYNTAX score was calculated and compared between the two groups. The correlation between FEV1 and SYNTAX score was analysed., Results: SYNTAX score was higher in patients with COPD than in patients without COPD (23.22 ± 12.10 vs. 17.92 ± 11.21, respectively; p = 0.013). Multivariate analysis demonstrated that COPD was independently predictive for intermediate and high SYNTAX score (odds ratio 4.833; 95% confidence interval 2.228-10.485; p < 0.001). Mean FEV1 (% predicted) was 64.7 ± 11.4 and negatively correlated with SYNTAX score in COPD group (r = -0.266 and p = 0.018). The receiver operating characteristic analysis yielded a cutoff value of 65.5 for the FEV1 to predict SYNTAX score ≥ 23, with sensitivity and specificity being 78.6% and 70%, respectively., Conclusions: COPD is a predictor of higher SYNTAX scores. FEV1 is associated with more severe and complex CAD.
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- 2016
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37. Aortic Elastic Properties and Myocardial Performance Index Are Impaired in Patients with Lichen Planus.
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Koseoglu C, Erdogan M, Ertem AG, Koseoglu G, Akoglu G, Aktas A, Ozdemir E, Kurmus O, Durmaz T, Keles T, and Bozkurt E
- Subjects
- Adult, Aortic Diseases diagnostic imaging, Cardiac Output, Cardiomyopathies diagnostic imaging, Echocardiography, Female, Humans, Male, Middle Aged, Aortic Diseases epidemiology, Cardiomyopathies epidemiology, Lichen Planus epidemiology, Vascular Stiffness
- Abstract
Objectives: The aim of this study was to investigate the elastic properties of the aorta and the myocardial performance index of the left ventricle (LV) in patients with lichen planus (LP)., Subjects and Methods: A total of 54 patients with LP and 50 controls were enrolled in the study. The 2 groups were well-matched regarding age, gender, body mass index, any smoking history, diabetes mellitus and systolic and diastolic blood pressure (SBP and DBP). The echocardiographic examination was performed on the study subjects and the controls. Aortic elasticity parameters and the myocardial performance index of the LV were calculated. The Student t test, the x03C7;2 test and multiple linear regression were used for the statistical analysis., Results: Aortic strain (AS, 4.77 ± 1.81 vs. 8.95 ± 2.22; p < 0.001) and aortic distensibility (AD, 0.25 ± 0.009 vs. 0.42 ± 0.120; p < 0.001) were significantly lower, and aortic stiffness index β (ASIβ, 3.65 ± 1.03 vs. 2.70 ± 0.91; p < 0.001) was significantly higher in the LP group than in the controls. The myocardial performance index (Tei index) was significantly higher in the LP group than in the control group (p = 0.001). The duration of the LP was negatively correlated with AS (r = -0.364, p < 0.001) and AD (r = -0.279, p = 0.006), and positively correlated with the Tei index (r = 0.324, p = 0.001) and ASIβ (r = 0.364, p < 0.001). After adjustment for relevant confounders (age, male gender, smoking, SBP, DBP, diabetes mellitus and low- and high-density lipoprotein cholesterol), LP and its duration were still associated with AS, AD and ASIβ., Conclusion: In this study, AS and AD were lower and ASIβ and myocardial performance index higher in LP patients than in controls., (© 2015 S. Karger AG, Basel.)
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- 2016
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38. Is coronary circulation the most important parameter for right ventricular functions?
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Ertem AG, Koseoglu C, Sivri S, Durmaz T, Keles T, and Bozkurt E
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- Female, Humans, Male, Vascular Diseases epidemiology, Ventricular Dysfunction, Left epidemiology, Ventricular Dysfunction, Right epidemiology
- Published
- 2015
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39. Impaired aortic function in patients with coeliac disease.
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Sari C, Ertem AG, Sari S, Efe TH, Keles T, Durmaz T, Ertem S, and Bozkurt E
- Subjects
- Adolescent, Adult, Atherosclerosis physiopathology, Echocardiography, Female, Humans, Male, Middle Aged, Young Adult, Celiac Disease physiopathology, Vascular Stiffness
- Abstract
Background and Aim: We aimed to investigate the association between aortic function (aortic stiffness index, aortic strain, and aortic distensibility), which is a predictor of atherosclerosis, and coeliac disease (CD)., Methods: Thirty-six patients with CD and 35 control subjects were included in the study. Serological screening was performed to determine the levels of auto-immune markers, including anti-gliadin immunoglobulin (Ig)A and IgG, and anti-tissue transglutaminase antibodies. Aortic distensibility, aortic strain, and aortic stiffness index were calculated using echocardiography., Results: Aortic strain and aortic distensibility were significantly lower in patients with CD than in control subjects (0.07 [0.03-0.14] vs. 0.09 [0.06-0.15], p < 0.001; 0.0036 ± 0.0012 vs. 0.0051 ± 0.0014, p < 0.001, respectively). However, the aortic stiffness index was significantly higher in patients with CD than in controls (1.14 [0.57-2.69] vs. 0.91 [0.59-1.92], p = 0.002). Coeliac disease was the only independent parameter that was correlated with aortic strain, aortic stiffness index, and aortic distensibility (b = -0.427, p < 0.001; b = 0.375, p = 0.003; b = -0.434, p < 0.001, respectively)., Conclusions: In this study, we showed deteriorated aortic functions by echocardiography in CD patients, which predicted subclinical atherosclerosis. Because deteriorated aortic functions is a strong predictor of future cardiovascular events, close cooperation with cardiologists and gastroenterologists is needed in the management of CD patients, and increased awareness of ischaemic heart disease risk factors in these patients and healthcare providers is warranted.
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- 2015
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40. Transfemoral balloon expandable aortic valve implantation on a patient with chronic lymphocytic leukemia following mitral valve prosthesis.
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Bozkurt E, Sari C, Keles T, Durmaz T, Aslan A, Bastug S, Akar Bayram N, Akcay M, Ayhan H, Kasapkara H, and Bilen E
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- Aged, Heart Valve Prosthesis, Heart Valve Prosthesis Implantation, Humans, Male, Mitral Valve surgery, Aortic Valve Stenosis surgery, Leukemia, Lymphocytic, Chronic, B-Cell pathology, Transcatheter Aortic Valve Replacement methods
- Published
- 2014
41. Effect of coronary artery bypass surgery on left ventricular function as assessed by strain and strain rate imaging.
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Durmaz T, Bayram H, Bayram N, Sari C, Keles T, Bastug S, and Bozkurt E
- Subjects
- Aged, Female, Humans, Male, Middle Aged, Time Factors, Coronary Artery Bypass, Coronary Artery Disease diagnostic imaging, Coronary Artery Disease physiopathology, Coronary Artery Disease surgery, Echocardiography, Doppler, Color, Ventricular Function, Left
- Abstract
Introduction: This study examined the effect of coronary artery revascularization on left ventricular function and the results of strain imaging for the detection of ischemia before and after coronary artery bypass graft (CABG) surgery., Material and Methods: Sixty-eight patients with a history of coronary artery disease (CAD) were included, prospectively. Conventional echocardiography and color tissue Doppler-derived strain-strain rate echocardiographic imaging were performed 24 hours before and 3 months after CABG surgery., Results: While strain rate values of the basal septum, middle segment of the lateral wall, middle segment of the inferior wall, and middle and basal segments of the anterior wall were significantly increased, other segments did not change after the operation. The mean systolic strain rate value was significantly increased after the operation. Left ventricle strain values in the middle segment of the septum, middle and basal segments of the inferior wall, and middle and basal segments of the anterior wall were significantly increased after the operation. No significant difference was noted in the basal septum or the middle and basal segments of the lateral wall after the operation. The mean systolic strain value was significantly increased after the operation., Conclusion: The results of this study suggest that strain and strain rate echocardiography can provide an accurate evaluation of regional contractile function after CABG, even in the segments that are apparently normal., (© The Author(s) 2013.)
- Published
- 2014
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42. Left main coronary artery obstruction by dislodged native-valve calculus after transcatheter aortic valve replacement.
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Durmaz T, Ayhan H, Keles T, Aslan AN, Erdogan KE, Sari C, Bilen E, Akcay M, and Bozkurt E
- Subjects
- Aged, Aortic Valve Stenosis diagnosis, Calculi diagnosis, Calculi therapy, Cardiac Catheterization instrumentation, Coronary Angiography, Coronary Occlusion diagnosis, Coronary Occlusion therapy, Echocardiography, Transesophageal, Fatal Outcome, Female, Humans, Percutaneous Coronary Intervention, Prosthesis Design, Severity of Illness Index, Tomography, X-Ray Computed, Treatment Outcome, Vascular Calcification diagnosis, Vascular Calcification therapy, Aortic Valve, Aortic Valve Stenosis therapy, Calculi etiology, Cardiac Catheterization adverse effects, Coronary Occlusion etiology, Heart Valve Prosthesis, Heart Valve Prosthesis Implantation adverse effects, Heart Valve Prosthesis Implantation instrumentation, Vascular Calcification etiology
- Abstract
Transcatheter aortic valve replacement can be an effective, reliable treatment for severe aortic stenosis in surgically high-risk or ineligible patients. However, various sequelae like coronary artery obstruction can occur, not only in the long term, but also immediately after the procedure. We present the case of a 78-year-old woman whose left main coronary artery became obstructed with calculus 2 hours after the transfemoral implantation of an Edwards Sapien XT aortic valve. Despite percutaneous coronary intervention in that artery, the patient died. This case reminds us that early recognition of acute coronary obstruction and prompt intervention are crucial in patients with aortic stenosis who have undergone transcatheter aortic valve replacement.
- Published
- 2014
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43. Coronary Slow Flow is Associated with Depression and Anxiety.
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Durmaz T, Keles T, Erdogan KE, Ayhan H, Bilen E, Bayram NA, Akcay M, Oz O, Albayrak Y, Ozdemir N, and Bozkurt E
- Abstract
Background: There is an established relationship between depression/anxiety disorders and cardiovascular morbidity and mortality which has been previously documented. However, there has been no study evaluating coronary slow flow in association with depression and anxiety., Methods and Results: A total of consecutive 90 patients were included in the study. All patients completed scoring scales for depression [Hamilton Rating Scale for Depression (HAMD)] and anxiety (STAI-1, State anxiety subscale of State-Trait Anxiety Inventory; STAI-2, Trait anxiety subscale of State-Trait Anxiety Inventory). Thereafter, they underwent selective coronary angiography and 2 groups were formed: coronary slow flow (n = 42), and normal coronary flow (n = 48). The two groups had comparable baseline characteristics. However, significant differences were found between coronary slow flow and normal coronary flow groups regarding depression (13.1 ± 8.2 and 6.9 ± 6.7, p < 0.001 for HAMD, respectively) and anxiety (46.2 ± 15.0 vs. 32.6 ± 9.9, p < 0.001 for STAI-1 and 51.0 ± 16.7 vs. 43.0 ± 10.7, p = 0.009 for STAI-2, respectively) scores. There were also significant positive correlations between depression/anxiety scores and TIMI frame counts of all major epicardial coronary arteries. In addition, after adjustment for smoking, hypertension, scoring scales, and the presence of depressive mood, all scoring scales and depressive mood were found to be independent risk factors for coronary slow flow in multivariable logistic regression analysis., Conclusions: Significant association was found among coronary slow flow, depression/anxiety scores and depressive mood., Key Words: Anxiety; Coronary slow flow; Depression; Scale.
- Published
- 2014
44. Relationship between aortic stiffness and the left ventricular function in patients with prediabetes.
- Author
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Aslan AN, Ayhan H, Çiçek ÖF, Akçay M, Durmaz T, Keles T, Çakır B, and Bozkurt E
- Subjects
- Adult, Aorta, Thoracic diagnostic imaging, Cardiovascular Diseases diagnostic imaging, Cardiovascular Diseases physiopathology, Female, Heart Ventricles physiopathology, Humans, Male, Middle Aged, Prediabetic State complications, Prediabetic State diagnostic imaging, Retrospective Studies, Risk Factors, Aorta, Thoracic physiopathology, Cardiovascular Diseases etiology, Echocardiography, Doppler methods, Heart Ventricles diagnostic imaging, Prediabetic State physiopathology, Vascular Stiffness physiology, Ventricular Function, Left physiology
- Abstract
Objective: Several studies have shown that arterial stiffness and ventricular dysfunction are increased in individuals with type 2 diabetes. Aortic stiffness (AS) reflects the mechanical tension and elasticity of the aorta, and increased aortic stiffness is a risk factor for cardiovascular disease. The aim of this study was to evaluate the degree of aortic stiffness and its relationship with the left ventricular (LV) function in patients with prediabetes and healthy control subjects., Methods: The study groups were composed of 50 patients with prediabetes and 47 healthy adults with similar demographic characteristics. The LV systolic and diastolic functions were assessed using standard two dimensional (2D) echocardiography, M-mode echocardiography, pulsed-wave (PW) echocardiography and tissue Doppler echocardiography. The degree of aortic strain and distensibility were calculated based on the aortic diameters measured on M-mode echocardiography at a level 3 cm above the aortic valve and the blood pressure values obtained on sphygmomanometry., Results: There were significant differences between the prediabetic and control groups in the degree of aortic strain (4.7 ± 2.8% vs. 14.9 ± 4.5%; respectively, p<0.001) and distensibility (2.0 ± 1.5 vs. 6.8 ± 2.3; 10(-3) cm(2) dyn(-1), respectively, p<0.001). In addition, significant differences were observed between the patient and control groups in the parameters of the LV systolic and diastolic functions. The left atrial diameter was significantly larger in the prediabetics than in the controls (35.9 ± 3.9 vs. 33.7 ± 4.2; respectively, p=0.027)., Conclusion: AS is increased in patients with prediabetes. In addition, there is a significant relationship between the degree of aortic stiffness and the LV function in this patient population. Therefore, the aortic elasticity parameters calculated on 2D echocardiography are useful for predicting early cardiovascular risks in prediabetics.
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- 2014
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45. Diminished serum paraoxonase activity in patients with coronary artery calcification.
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Durmaz T, Keles T, Ayhan H, Cay N, Bayram NA, Bilen E, Akcay M, Erdogan KE, Erel O, and Bozkurt E
- Subjects
- Aged, Coronary Artery Disease blood, Female, Humans, Male, Middle Aged, Aryldialkylphosphatase blood, Aryldialkylphosphatase metabolism, Calcinosis blood, Coronary Artery Disease diagnosis, Coronary Artery Disease enzymology
- Abstract
Background: Previous studies have shown an association between paraoxonase (PON) activity and the presence and severity of coronary atherosclerosis., Aim: To demonstrate any association between serum PON activity and the presence and severity of coronary artery calcification (CAC)., Methods: A total of 156 consecutive patients having the suspicion of coronary atherosclerosis or needing risk stratification for cardiovascular events were included in the present study. Peripheral venous blood samples of all participants to measure serum PON activity were collected before undergoing multidetector computed tomography, which was used to determine the presence and quantity of CAC., Results: Serum PON-1 levels were lower in the CAC group compared to the no CAC group (60 [35-96] U/L vs. 291 [230-371] U/L, respectively, p < 0.001). There was a significant negative correlation between total CAC score and PON (r2 = 0.335, p < 0.001). In multivariate analysis, the significant and independent predictors of the presence of CAC were male sex, high-sensitive C-reactive protein, and PON. Similarly, increased PON was significantly and independently associated with freedom from CAC. In receiver operating characteristics analysis, PON level < 197 U/L had 87% sensitivity, 91% specificity, 93% positive predictive value, and 85% negative predictive value in predicting CAC., Conclusions: Diminished serum PON activity is significantly and independently associated with the presence and severity of CAC, and vice versa.
- Published
- 2014
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46. Transfemoral balloon expandable aortic valve implantation in a patient with myelodysplastic syndrome.
- Author
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Akçay M, Sari C, Durmaz T, Keles T, Ozen M, Bayram N, Bilen E, Ayhan H, Kasapkara H, and Bozkurt E
- Subjects
- Aged, Aortic Valve pathology, Aortic Valve Stenosis pathology, Humans, Male, Aortic Valve surgery, Aortic Valve Stenosis complications, Aortic Valve Stenosis surgery, Heart Valve Prosthesis, Myelodysplastic Syndromes complications
- Abstract
In this case presentation, the transcatheter aortic valve implantation (TAVI) intervention successfully performed on a 76-year-old male patient with severe degenerative aortic stenosis and diagnosed with myelodysplastic syndrome (MDS) is discussed. This case presentation represents the first case on the treatment of severe aortic stenosis on a patient with myelodysplastic syndrome through the use of the TAVI method and may form an alternative to surgery in patients with severe aortic stenosis who have a known haematological disease. For a successful procedure, the patient must be evaluated in cooperation with the haematology clinic and all necessary precautions regarding bleeding and infection complications of the patient must be taken prior to the procedure.
- Published
- 2013
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47. Assessment of left ventricular functions in patients with Sjögren's syndrome using tissue Doppler echocardiography.
- Author
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Bayram NA, Cicek OF, Erten S, Keles T, Durmaz T, Bilen E, Sarı C, and Bozkurt E
- Subjects
- Adult, Case-Control Studies, Diastole physiology, Echocardiography, Doppler methods, Female, Humans, Male, Middle Aged, Pulse Wave Analysis, Severity of Illness Index, Systole physiology, Heart Ventricles diagnostic imaging, Heart Ventricles physiopathology, Sjogren's Syndrome diagnostic imaging, Sjogren's Syndrome physiopathology, Ventricular Dysfunction, Left diagnostic imaging, Ventricular Dysfunction, Left physiopathology
- Abstract
Aim: In our study, we aimed to evaluate left ventricular function in patients with Sjögren syndrome (SS) using tissue Doppler echocardiography (TDE) and myocardial performance index (MPI) in addition to conventional echocardiographic methods., Methods: We evaluated 50 patients with SS and 48 healthy volunteers with similar demographic characteristics. Systolic and diastolic functions of the left ventricle were analyzed with standard two-dimensional (2D) echocardiography, M-mode echocardiography, pulsed-wave (PW) Doppler and tissue Doppler imaging., Results: Septal part of the mitral annulus PW TDE showed that systolic myocardial wave (Sm), early diastolic myocardial wave (Em), late diastolic myocardial wave (Am) and Em/Am ratios are significantly lower, and myocardial isovolumetric relaxation time (IVRTm) and MPI values are significantly higher in patients with SS. Lateral site of the mitral annulus PW TDE showed that Em, Sm and Em/Am ratios are significantly lower, and IVRTm and MPI values are significantly higher in patients with SS compared with healthy controls., Conclusion: In this study, it was shown that both left ventricle systolic and diastolic functions of patients with SS were disturbed., (© 2013 The Authors International Journal of Rheumatic Diseases © 2013 Asia Pacific League of Associations for Rheumatology and Wiley Publishing Asia Pty Ltd.)
- Published
- 2013
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48. Increase in mean platelet volume in patients with myocardial bridge.
- Author
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Bilen E, Tanboga IH, Kurt M, Kocak U, Ayhan H, Keles T, and Bozkurt E
- Subjects
- Atherosclerosis blood, Atherosclerosis etiology, Atherosclerosis pathology, Case-Control Studies, Coronary Angiography, Coronary Artery Disease blood, Coronary Artery Disease etiology, Coronary Artery Disease pathology, Female, Humans, Male, Mean Platelet Volume methods, Middle Aged, Myocardial Bridging etiology, Myocardial Bridging pathology, Blood Platelets pathology, Myocardial Bridging blood
- Abstract
Aim: Myocardial bridge is associated with atherosclerosis altered in shear stress and endothelial dysfunction. Mean platelet volume (MPV), a determinant of platelet activation, is shown to be related with atherosclerosis and endothelial dysfunction. In this study, we aimed to evaluate platelet function assessed by MPV in patients with myocardial bridge., Methods: Forty-two patients with myocardial bridge in the left anterior descending artery (LAD) and 43 age- and gender-matched healthy participants were included in the study. Myocardial bridging was defined as an intramyocardial systolic compression or milking of a segment of an epicardial coronary artery on angiography. For the entire study population, MPV was measured using an automatic blood counter., Results: The study population consisted of 42 patients with myocardial bridge (52.7 ± 10.2, 76.2% male) and 43 age- and sex-matched healthy control participants (52.1 ± 10.4, 74.4% male). Compared to the control group, MPV value was significantly higher in patients with myocardial bridge (8.9 ± 1.24 vs 8.3 ± 0.78; P = .01). Further, there were no significant differences between groups regarding hemoglobin level, platelet count, fasting blood glucose, and creatinine levels., Conclusions: Our study findings indicated that myocardial bridge is associated with elevated MPV values. Our results might partly explain the increased cardiovascular events in patients with myocardial bridge.
- Published
- 2013
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49. Coronary slow flow and abnormal nocturnal blood pressure profile in normotensives.
- Author
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Durmaz T, Keles T, Erdogan KE, Ayhan H, Bilen E, Akcay M, Bayram NA, Bastug S, and Bozkurt E
- Subjects
- Adult, Aged, Demography, Female, Hemodynamics, Humans, Male, Middle Aged, Multivariate Analysis, Odds Ratio, Systole physiology, Blood Pressure physiology, Coronary Circulation physiology, No-Reflow Phenomenon physiopathology
- Abstract
Background: Abnormal nocturnal blood pressure (BP) profile has been linked to microvascular function and autonomic dysfunction. However, no data were available regarding nocturnal BP profile in coronary slow flow (CSF)., Aim: The aim was to investigate any association between CSF and abnormal BP response in normotensive patients., Methods: Consecutive 45 patients with CSF and 45 patients with normal blood flow during coronary angiography underwent 24-hour ambulatory BP monitoring. Hemodynamic parameters including 24-hour, daytime and nighttime systolic/diastolic/mean/pulse pressures, and BP % changes were obtained. Dippers, nondippers, and reverse dippers were determined., Results: Baseline characteristics of both groups were well matched except for TIMI (Thrombosis in Myocardial Infarction) frame counts for all major epicardial coronary arteries. No statistical significance was detected regarding to hemodynamic parameters obtained by 24-hour ambulatory BP monitoring. The prevalence of nondippers was higher in CSF patients compared with controls (51.1% vs 28.9%, respectively). In univariate analysis, systolic BP change (%), 24-hour diastolic BP, diastolic BP change (%), 24-hour mean BP, mean BP change (%), nondipper/reverse dipper, and separately nondipper status were found to be significant predictors for CSF. However, in multivariate logistic regression analysis, systolic BP change (%) (odds ratio [OR], 0.934; 95% confidence interval [CI], 0.874-0.998; P = 0.045), nondipper/reverse dipper status (OR, 0.505; 95% CI, 0.265-0.962; P = 0.038), and separately nondipper status (OR, 0.317; 95% CI, 0.126-0.797; P = 0.015) were found to be significant predictors for CSF., Conclusion: The frequency of nondippers was higher in slow flow, and there was a significant association between CSF and abnormal nocturnal BP profile in normotensives.
- Published
- 2013
- Full Text
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50. The effects of undifferentiated spondyloarthropathy on left ventricular systolic and diastolic function.
- Author
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Albayrak N, Bayram NA, Erten S, Sari C, Keles T, Durmaz T, Bastug S, and Bozkurt E
- Subjects
- Adult, Case-Control Studies, Chi-Square Distribution, Cross-Sectional Studies, Echocardiography, Doppler, Pulsed, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Spondylarthropathies diagnosis, Stroke Volume, Ventricular Dysfunction, Left diagnosis, Ventricular Dysfunction, Left physiopathology, Diastole, Spondylarthropathies complications, Systole, Ventricular Dysfunction, Left etiology, Ventricular Function, Left
- Abstract
Background: Recent studies report that cardiovascular mortality is more common in patients with spondyloarthropathy (SpA) compared with the normal population. In this study, we aimed to determine left ventricular systolic and diastolic functions using tissue Doppler echocardiography (TDE) in addition to conventional methods in undifferentiated SpA (uSpA) patients., Methods: A total of 45 patients and 44 age and sex matched healthy controls participated in the present study. Left ventricular systolic and diastolic functions were assessed with two dimensional (2D) echocardiography, M-mode echocardiography, pulsed-wave (PW) echocardiography and tissue Doppler echocardiography. The peak systolic velocity (Sm), early diastolic myocardial peak velocity (Em), and late diastolic myocardial peak velocity (Am), myocardial isovolumetric contraction time (IVCTm), myocardial ejection time (ETm), myocardial isovolumetric relaxation time (IVRTm) and myocardial performance index (MPI) were measured at septal and lateral mitral annulus., Results: Left ventricular diastolic inflow velocities showed that isovolumetric relaxation time (IVRT) and deceleration time (DT) were significantly longer in the uSpA group. Left ventricular lateral wall PW tissue Doppler echocardiography showed that Em was significantly lower in uSpA group. Septal PW tissue Doppler echocardiography showed that Em was lower and IVRT was longer in the uSpA group compared with healthy controls., Conclusion: In this study we determined that left ventricular systolic function is preserved in patients with uSpA. Although frequency of diastolic dysfunction was similar in both groups, deterioration of some diastolic parameters in the uSpA group might be considered for possible cardiac involvement in patients with uSpA., (© 2013 The Authors International Journal of Rheumatic Diseases © 2013 Asia Pacific League of Associations for Rheumatology and Wiley Publishing Asia Pty Ltd.)
- Published
- 2013
- Full Text
- View/download PDF
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