95 results on '"Velcheva I"'
Search Results
2. HEMORHEOLOGICAL MODELS APPLIED TO DATA ANALYSIS IN GROUPS OF PATIENTS AND IN HEALTHY SUBJECTS
- Author
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ANTONOVA, N., primary, PASKOVA, V., additional, VELCHEVA, I., additional, and ZVETKOVA, E., additional
- Published
- 2023
- Full Text
- View/download PDF
3. Gender-related differences in the cardiac autonomic function in patients with Parkinson’s disease.: EP1209
- Author
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Mantarova, S., Damyanov, P., Stambolieva, K., and Velcheva, I.
- Published
- 2014
4. LOCAL CAROTID STIFFNESS AND HEMODYNAMIC FORCES IN PATIENTS WITH CEREBRAL LACUNAR INFARCTIONS.
- Author
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Kmetski, Ts., Velcheva, I., Antonova, N., Tsonevska, G., Stambolieva, K., Alexandrova, A., and Bechev, B.
- Subjects
CAROTID intima-media thickness ,PULSE wave analysis ,CAROTID artery ,CEREBRAL infarction ,ARTERIAL diseases - Abstract
Objective: The carotid stiffness is an important factor in the pathogenesis of cerebrovascular small vessel disease. Our study aimed to evaluate the relation of the local arterial stiffness of the common carotid artery CCA) to the hemodynamic forces in patients with cerebral lacunar infarctions (LI). Methods: The study includes 22 patients with chronic LI and 15 age-matched controls. An ultrasound examination of the CCA intima-media thickness (IMT), the parameters of local CCA stiffness: distensibility (DC) and compliance coefficients (CC), α and β stiffness indices and pulse wave velocity (PWV) were performed. The local hemodynamic forces were calculated: circumferential wall tension (CWT) and wall shear stress (WSS). Results: Higher values of IMT, a significant decrease of DC and CC and an increase of α and β stiffness indices and PWV in the LI patients compared to the controls were obtained. A parallel significant increase in CWT and a decrease in WSS were found. In the LI patients, the increased stiffness indices were associated with an increase in age and cholesterol in the left CCA. In the controls, the IMT correlated significantly with the hemodynamic factors in both CCAs, while the stiffness indices correlated with the hemodynamic forces in the left CCA. Conclusion: The results of the present study demonstrate different associations of the local carotid stiffness indices with the hemodynamic forces in patients with LI and controls. [ABSTRACT FROM AUTHOR]
- Published
- 2024
5. Blood rheological and electrical properties and relationships with the microvascular tone regulation in patients with diabetes mellitus type 2
- Author
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Antonova, N. M., primary, Paskova, V. K., additional, and Velcheva, I. V., additional
- Published
- 2021
- Full Text
- View/download PDF
6. Carotid Blood Flow and Cardiac Function in Subjects with Risk Factors and Patients with Cerebrovascular Diseases: Correlative Neurosonographic and Echocardiographic Studies
- Author
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Titianova, E., Velcheva, I., Karakaneva, S., Ramshev, K., Daskalova, I., Filcheva, K., Christova, K., and Dimitrov, Dim. N.
- Published
- 2009
7. Fourth meeting of the European Neurological Society 25–29 June 1994 Barcelona, Spain: Abstracts of Symposia and free communications
- Author
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Harms, L., Bock, A., JÄnisch, W., Valdueza, J., Weber, J., Link, I., De Keyser, J., Goossens, A., Wilczak, N., Vedeler, C., Bjorge, L., Uvestad, E., Conti, G., Williams, K., Ginsberg, L., Rafique, S., Rapoport, S. I., Gershfeld, N. L., De La Meilleure, G., Crevits, L., Faiss, J. H., Heye, N., Blanke, J., Sackmann, A., Kastrup, O., Doornbos, R., van der Worp, H. B., Kappelle, L. J., Bar, P. R., Davie, C. A., Barker, G. J., Brenton, D., Miller, D. H., Thompson, A. J., Block, F., Schwarz, M., Delodovici, L., Baruzzi, F., Bonaldi, G., Dario, A., Marra, A., Mercuri, A., Dworzak, F., Cavallari, P., Confalonieri, P., Zuffi, M., Antozzi, C., Cornelio, F., Baldissera, F., Chassande, B., Ameri, A., Eymard, B., Poisson, M., Vérier, A., Brunet, P., Congia, S., Murgia, P. L., Cannas, A., Borghero, G., Uselli, S., Mellino, G., Ferrai, R., Lampis, R., Massa, R., Muzzetto, B., Giannini, F., Rossi, S., Cioni, R., d'Aniello, C., Guarneri, A., Battistini, N., Ceriani, F., Del Santo, A., Poloni, M., Campo, J. F., Iglesias, F., Guitera, M. V., Farinas, C., Pascual, J., Leno, C., Berciano, J., Thorpe, I. W., Kendall, B. E., McDonald, W. I., Moulignier, A., Dromer, F., Baudrimont, M., Dupont, B., Gozlan, J., El Amrani, M., Petit, J. C., Roullet, E., Sterzi, R., Causaran, R., Protti, A., Riva, M., Erminio, F., Arena, O., Villa, F., Maccagnano, E., Miletta, M., Spinelli, F., Ben-Hur, T., Weidenfeldl, J., Rao, N. S., Chari, C. C., Laforet, P., Matheron, S., Adams, D., Chemouilli, Ph., Desi, M., Said, G., Davous, P., Lionnet, F., Pulik, M., Genet, P., Rozenberg, F., Cartier, L. M., Castillo, J. L., Cea, J. G., Villagra, R., de Saint Martin, L., Mahieux, F., Manifacier, M. J., Mattos, K., Queiros, C., Publio, L., Vinhas, V., PeÇanha-Martins, A. C., Melo, A., Liska, U., Zifko, U., Budka, H., Drlicek, M., Grisold, W., Kaufmann, R., Kaiser, R., Czygan, M., Gomes, I., Jones, N., Cunha, S., EmbiruÇu, E. Katiane, Vieira, V., Araujo, I., Alexandra, M., Ferreira, A., Goes, J., Chemouilli, P., Israel-Biet, Masson, H., Lacroix, C., Gasnault, J., Hildebrandt-Müller, B., Oschmann, P., Krack, P., Willems, W. R., Dorndorf, W., Freitas, V., Bittencourt, A., Fernandes, D., Nascimento, M. H., Severo, M., Moraes, D., Muller, M., Hasert, K., Merkelbach, S., Schimrigk, K., van Oosten, B. W., Lai, M., Polman, C. H., Bertelsmann, F. W., Hodgkinson, S., Cabre, P. H., Volpe, L., Smadja, D., Vernant, J. P., Villaroya, H., Violleau, K., Younes-Chennoufi, A. Ben, Baumann, N., Villanueva-Hemandez, P., Ballabriga, J., Basart, E., Arbizu, T. X., Perez-Serra, J., Vinuels, F., Giron, J. M., Castilla, J. M., Redondo, L., Izquierdo, G., Lauer, K., Henneberg, A., Bittmann, N., Link, D., Wollinsky, K. H., Mobner, R., Fassbender, K., Kuhnen, J., Schwartz, A., Hennerici, M., Miller, A., Lider, O., Abramsky, O., Weiner, H. L., Offner, H., Vanderbark, A. A., Paoino, E., Fainardi, E., Addonizio, M. C., Ruppi, P., Tola, M. R., Granieri, E., Carreras, M., Sazdovitch, V., Joutel, A., Verdier-taillefer, M. H., Heinzlef, O., Radder, C., Tournier-Lasserve, E., Brenner, R. E., Munro, P. M. G., Williams, S. C. R., Bell, J. D., Hawkins, C. P., Filippi, M., Campi, A., Dousset, V., Canal, N., Comi, G., Zhu, J., Weber, F., Retska, R., List, J., Zhang, L., Brock, M., Taphoorn, M. J. B., Heimans, J. J., van der Veen, E. A., Karim, A. B. M. F., Sarazin, M., Argentino, N., Delattre, J. Y., Derkinderen, P., Buchwald, B., Schroter, G., Serve, G., Franke, C. H., Conrad, B., Kitchen, N. D., Thomas, D. G. T., Forman, A. D., Ang, Kie- Kian, Price, R., Stephens, C., Salmaggi, A., Nermni, R., Silvani, A., Forno, M. G., Luksch, R., Boiardi, A., Grzelec, H., Fryze, C., Nowacki, P., Zdziarska, B., Sanson, M., Merel, P., Richard, S., Rouleau, G., Thomas, G., Olsen, N. K., Pfeiffer, P., Egund, N., Bentzen, S. M., Johannesen, L., Mondrup, K., Rose, C., Zyluk, B., Wondrusch, E., Berger, O., Fast, N., Jellinger, K., Lindner, K., Urman, A., Thibault, J. L., Duyckaerts, Ch., Strik, H., Muller, B., Richter, E., Krauseneck, P., Steinbrecher, A., Schabet, M., Hess, C., Bamberg, M., Dichgans, J., Counsell, C. E., McLeod, M., Grant, R., Creel, G. B., Claus, D., Sieber, E., Engelhardt, A., Rechlin, T., Thierauf, P., Neubauer, U., Peresson, M., Di Giovacchino, G., Romani, G. L., Di Silverio, F., Danek, A., Kuffner, M., Hoermann, R., Schopohl, J., Laska, M., Heye, B., Zangaladze, A. T., Valls-SoIè, J., Cammarota, A., Alvarez, R., Tolosa, E., Hallett, M., Ulbricht, D., Ganslandt, O., Kober, H., Vieth, J., Grummich, P., Pongratz, H., Brigel, C., Fahlbusch, R., Serra, F. P., Palma, V., Nolfe, G., Buscaino, G. A., Rothstein, T. L., Gibson J. M., Morrison P. M., Collins A. D., Eiselt, M., Wagnur, H., Zwiener, U., Schindler, T., Efendi, H., Ertekin, C., Erfas, M., Larsson, L. E., Sirin, H., AraÇ, N., Toygar, A., Demir, Y., Seddigh, S., Vogt, T. H., Hundemer, H., Visbeck, A., Pastena, L., Faralli, F., Mainardi, G., Gagliardi, R., Linden, D., Berlit, P., Lopez, O. L., Becker, J. T., Jungreis, C., Brenner, R., Rezek, D., Dekesky, S. T., Estol, C., Boller, F., Fernandez, J. M., Mederer, S., Batlle, J., Turon, A., Codina, A., Hitzenberger, P., Vila, N., Valls-SolÇ, J., Chamorro, A., Pouget, J., Schmied, A., Morin, D., Azulay, J. Ph., Vedel, J. P., Montalt, J., Escudero, J., Barona, R., Campos, A., Varli, K., Ertem, E., Uludag, B., Yagiz, A., Privorkin, Z., Steinvil, Y., Kott, E., Combarros, O., Sanchez-Pernaute, R., Orizaola, P., Mokrusch, Th., Kutluaye, E., Selcuki, D., Ertikin, C., Zettl, U., Gold, R., Harvey, G. K., Hartung, H. P., Toyka, K. V., Wokke, J. H. J., Oey, P. L., Ippel, P. F., Jansen, G. H., Franssen, H., Toyooka, K., Fujimura, H., Ueno, S., Yoshikawa, H., Yorifuji, S., Yanagihara, T., Talamon, C., Tzourio, C., Kiefer, R., Jung, S., Toyka, K., Ruolt, I., Tranchant, C., Mohr, M., Warter, J. M., Younger, D. S., Rosoklija, G., Hays, A. P., Kurita, R., Hasegawa, O., Matsumto, M., Komiyama, A., Nara, Y., Oueslati, S., Belal, S., Turki, I., Ben Hamida, C., Hentati, F., Ben Hamida, M., Kwiecinski, H., Krolicki, L., Domzal-Stryga, A., Dellemijn, P. L. I., van Deventer, P., van Moll, B., Drogendijk, T., Vecht, Ch. J., Nemni S., Amadio, Fazio, R., Galardin, G., Delodovici, M. L., Peghi, E., Monticelli, M. L., Sessa, A., Viguera, M. L., Palomar, M., Gamez, J., Cervera, C., Navarro, C., Serena, J., Duran, I., Fernandez, A. L., Comabella, M., Nos, C., Rio, J., Montalban, J., Navarro, X., Verdu, E., Darbra, S., Buti, M., Mrabet, A., Fredj, M., Gouider, R., Tounsi, H., Khalfallah, N., Haddad, A., Dbaiss, T., Ghnassia, R., Rouillet, E., Chedru, F., Porsche, H., Strenge, H., Li, S. W., Young, Y. P., Garcia, A. A., Baron, P., Scarpini, E., Bianchi, R., Conti, A., Livraghi, S., Rees, J. H., Gregson, N. A., Hughes, R. A. C., Sedano, M. J., Calleja, J., Canga, E., Bahou, Y., Biary, N., Al Deeb, S. M., Guern, E. L. E., Gugenheim, M., Tardieu, S., Aisonobe, T. M., Agid, Y., Bouche, P., Brice, A., Rautenstrauss, B., Nelis, E., Grehl, H., Van Broeckhoven, C., Pfeiffer, R. A., Liehr, T., Ganzmann, E., Gehring, C., Neundörfer, B., Geremia, L., Doronzo, R., Sacilotto, G., Sergi, P., Pastorino, G. C., Scarlato, G., Planté-Bordeneuve, V., Mantel, A., Baas, F., Moser, H., Antonini, A., Psylla, M., Günther, I., Vontobell, P., Beer, H. F., Leenders, K. L., Chaudhuri, K. Ray, Parker, J., Pye, I. F., Millac, P. A. H., Abbott, R. J., Sutter, M., Albani, C., de Rijk, M. C., Breteler, M. M. B., Graveland, G. A., van der Mechè, F. G. A., Hofman, A., Keipes, M., Hilger, Ch., Diederich, N., Metz, H., Hentges, F., Pollak, P., Benabid, A. L., Limousin, P., Hoffmann, D., Benazzouz, A., Perret, J., Laihinen, A., Rinne, J. O., Ruottinen, H., Nagren, K., Lehikoinen, P., Oikonen, V., Ruotsalainen, U., Rinne, U. K., Cocozza, S., Pizzuti, A., Cavalcanti, F., Monticelli, A., Pianese, L., Redolfi, E., Paiau, F., Di Donato, S., Pandolfo, M., Palau, F., Monros, E., De Michele, G., Smeyers, P., Lopez-ArLandis, J., Uilchez, J., Filla, A., Genis, D., Matilla, T., Volpini, V., Blanchs, M. I., Davalos, A., Molins, A., Rosell, J., Estivill, X., De Jonghe, P., Smeyers, G., Krols, L., Mercelis, R., Hazan, J., Weissenbach, J., Martin, J. J., Warner, T. A. T., Williams, L., Orb, A. S., Harding, A. E., Giunti, P., Sweeney, M. G., Spadaro, M., Jodice, C., Novelletto, A., Malaspina, P., Frontali, M., Salmon, E., Gregoire, Del Fiore, Comar, Franck, G., Scheltens, P. H., Siegfried, K., Dartigues, E., De Deyn, P., Horn, R., Nelson, I., Hanna, M. G., Morgan-Hughes, J. A., Collinge, J., Palmer, M. S., Campbell, T., Mahal, S., Sidle, K., Humphreys, C., Tavitian, B., Pappata, S., Jobert, A., Crouzel, A. M., DiGiamberardino, L., Steimetz, G., Barbanti, P., Fabbrini, G., Salvatore, M., Buzzi, M. G., Di Piero, V., Petraroli, R., Sbriccoli, A., Pocchiari, M., Macchi, G., Lenzi, G. L., Spiegel, R., Maguire, P., Schmid, W., Ott, A., Bots, M. L., Grobbe, D. E., Hofman, A., Howard, R. S., Russell, S., Losseff, N., Hirsch, N. P., Couderc, R., Bailleul, S., Nargeot, M. C., Touchon, J., Picot, M. C., Rizzo, M., Watson, G., McGehee, D., Dingus, T., Kappos, L., Radü, E. W., Haas, J., Hartard, C. H., Spuler, S., Yousry, T., Voltz, R., Scheller, A., Holler, E., Hohlfeld, R., Scolding, N. J., Sussman, J., Kolar, O. J., Farlow, M. R., Rice, P. H., Zipp, F., Sotgiu, S., Weiss, E. H., Wekerle, H., Chalmers, R., Robertson, N., Compston, D. A. S., Martino, G., Clementi, E., Brambilla, E., Moiola, L., Martinelli, V., Colombo, B., Poggi, A., Rovaris, M., Grimaldi, L. M. E., Roth, M. P., Descoins, P., Ballivet, S., Ruidavets, J. B., Waubant, E., Nogueira, L., Cambon-Thomsen, A., Clanet, M., Leppert, D., Hauser, S., Lugaresi, A., Tartaro, A., D'aurelio, P., Befalo, L. L. O., Thomas, A., Malatesta, G., Gambi, D., Benedikz, J. E. G., Magnusson, H., Poser, C. M., Guomundsson, G., Bates, T. E., Davies, S. E. C., Clark, J. B., Landon, D. N., ùther, J. R., Rautenberg, W., Overgaard, K., Sereghy, T., Pedersen, H., Boysen, G., Diez-Tejedor, E., Carceller, F., Gutierrez, M., Lopez-Pajares, R., Roda, J. M., Chandra, B., Ricart, W., Gonzalez-Huix, F., Molina, A., Rundek, T., Demarin, V., De Reuck, J., Boon, P., Decoq, D., Strijckmans, K., Goethals, P., Lemahieu, I., Nibbio, A., Chabriat, H., Vahedi, K., Nagy, T., Verin, M., Mas, J. L., Julien, J., Ducrocq, X., Iba-Zizen, M. T., Cabanis, E. A., Bousser, M. G., Rolland, Y., Landgraf, F., Bompais, B., Lemaitre, M. H., Edan, G., Vorstrup, S., Knudsen, L., Olsen, K. Skovgaard, Videbaek, C., Schroeder, T., van Gijn, J., Jansen, H. M. L., Pruim, J., Paans, A. M. J., Willemsen, A. T. M., Hew, J. M., vd Vliet, A. M., Haaxma, R., Vaalburg, W., Minderhoud, J. M., Korf, J., Soudain, S. E., Ho, T. W., Mishu, B., Li, C. Y., Nachainkin, I., Gao, C. Y., Cornblath, D. R., Griffin, J. W., Asbury, A. K., Blaser, M. J., McKhann, G. M., Ho, T., Macko, C., Xue, P., Stadlan, E. M., Ramos-Alvarez, M., Valenciano, L., Visser, L. H., van der Meché, F. G. A., van Darn, P. A., Meulstee, J., Schmitz, P. I. M., Jacobs, B., Oomes, P. G., Kleyweg, R. P., Jacobs, B. C., Endtz, H. P., van Doorn, P. A., van der Mech, F. G. A., Van den Berg, L. H., Mollee, I., Logtenberg, T., Thomas, P. K., Plant, G., Baxter, P. J., Luis, R. Santiago, Matsumoto, M., Notermans, N. C., Wokke, J. H. J., Lokhorst, H. M., van der Graaf, Y., Jennekens, F. G. I., Azulay, J. P., Bille-Turg, F., Valentin, P., Farnarier, G. G., Pellissier, J. F., Serratrice, G., Quasthoff, S., Schneider, U., Grafe, P., Hilkens, P. H. E., Moll, J. W. B., van der Burg, M. E. L., Planting, A. S. T., van Putten, W. L. J., van den Bent, M. J., Birklein, F., Spitzer, A., Lang, E., Neundorfer, B., Diehl, R. R., Lücke, D., Smith, G. D. P., Mathias, C. J., Serra, J., Campera, M., Ochoa, J. L., Ray Chaudhuri, K., Pavitt, D., Alam, M., Handwerker, H. O., Bleasdale-Barr, K., Smith, G., Murray, N. M. F., Hawkins, P., Pepys, M., Gellera, C., DiDonato, S., Taroni, F., Uncini, A., Di Muzio, A., Servidei, S., Silvestri, G., Lodi, R., Iotti, S., Barbiroli, B., Morrissey, S. P., Borruat, F. X., Francis, D., Mosely, I., Hansen, H. C., Helmke, K., Kunze, K., Sadzot, B., Maquet, P., Lemaire, Plenevaux, Damhaut, Sommer, C., Myers, R. R., Berta, E., Mantegazza, R., Argov, Z., Shapira, Y., Wirguin, I., Beuuer, J., Franke, C., Roberts, M., Willison, H., Vincent, A., Newsom-Davis, J., Morrison, K. E., Damels, R., Francis, M., Campbell, L., Davies, K. E., Kohler, W., Bucka, C., Hertel, G., Kanovsky, P., Auer, D., Ackermann, H., Klose, U., Naegele, Th., Bien, S., Voigt, K., Fink, G. R., Stephan, K. M., Wise, R. J. S., Mullatti, N., Hewer, L., Frackowiak, R. S. J., Weiller, C. S., Rijnites, M., Jueptner, M., Bauermann, T., Krams, M., Diener, H. C., van Walderveen, M. A. A., Barkhof, F., Hommes, O. R., Valk, J., Willmer, J. P., Guzman, D. A., Passingham, R. E., Silbersweig, D., Ceballos-Baumann, A., Frith, C. D., Frackowiak, R., Lucas, C. H., Goullard, L., Marchau, M. J., Godefroy, O., Rondepierre, P. H., Chamas, E., Mounier-Vehier, F., Leys, D., Renato, J., Verdugo, M. S. C., Campero, M., Jose, L., Ochoa, D. S. C., Vivancos, F., Tejedor, E. Diez, Martinez, N., Roda, J., Frank, A., Barreiro, P., Satoh, Y., Nagata, K., Maeda, T., Hirata, Y., YalÇinerner, B., Ozkara, C., Ozer, F., Ozer, S., Hanoglu, L., Zunker, P., Pozo, J. L., Oberwittler, C., Schick, A., Buschmann, H. -Ch., Ringelstein, E. Bernd, Lara, M., Anzola, G. P., Magoni, M., Volta, G. Dalla, Tarasov, A., Feigin, V., Beaudry, M. G., Carrier, S., Chicoutimi, Henriques, I. L., Bogoussslavsky, J., van Melle, G., Mathieu, J., Perusse, L., Allard, P., Prevost, C., Cantin, L., Bouchard, J. M., De Braekeleer, M., Agbo, C., Neau, J. P., Tantot, A. M., Dary-Auriol, M., Ingrand, P., Gil, R., Baltadjiev, D., Zekin, D., Sabey, K., Gennaula, C. P., Pope, B. A., Caparros-Lefebvre, D., Girard-Buttaz, I., Pruvo, J. P., Petit, H., Hipola, D., Martin, M., Giménez-Roldan, S., Ivanez, V., Japaridze, G., Carrasco, J. L., Picomell, I., Herranz, J. L., Macias, J. A., Nieto, M., Noya, M., Oller, L., Kiteva-Trencevska, G., Delgado, M. R., Liu, H., Luengo, A., Parra, J., Colas, J., Fernandez, M. J., Manzanares, R., Kornhuber, M. E., Malashkhia, V., Orkodashili, G., Martinez, M., Bonaventura, I., Porta, G., Martinez, I., Fernandez, A., Aguilar, M., Masnou, P., Drouet, A., Dreyfus, M., Cartron, J., Morel-Kopp, M. C., Tchernia, G., Kaplan, C., Lammers, M. W., Hekster, Y. A., Keyser, A., Meinardi, H., Renier, W. O., Boon, P. A. J. M., Have, M. D., Kint, B., Cruz, P., Cadilha, A., Almeida, R., Goncalves, M., Pimenta, M., Ramos, L. M. P., Polder, T. W., Broere, C. A., Polman, L., Rother, I., Rother, M., Schlaug, G., Arnold, S., Holthausen, H., Wunderlich, G., Ebner, A., Luders, H., Witte, O. W., Seitz, R. J., Serra, L. L., Gallicchio, B., Rotondi, F., Wieshmann, U., Meierkord, H., Sabev, K., Di Carlo, V., Gueguen, B., Derouesné, Ch., Ancri, D., Bourdel, M. C., Guillou, S., Aliaga, R., Chornet, M. A., Rodrigo, A., Pascual, A. Pascual -Leone, Catala, M. D., Pascual-Leone, A., Benbadis, S. R., Dinner, D. S., Chelune, G. J., Lüders, H. O., Piedmonte, M. R., Blanco, T., Lopez, M. P., Romero, B., Deltoro, A., Pascual, A., Pascual, Leone, Bolgert, F., Josse, M. O., Tassan, P., Touze, E., Laplane, D., Godenberg, F., Brizioli, E., Del Gobbo, M., Pelliccioni, G., Scarpino, O., Durak, H., Damlacik, G., Tunca, Z., Fidaner, H., Yurekli, Y., Yemez, B., Kaygisiz, A., Anllo, E. A., Esperet, E., Giovagnoli, A. R., Casazza, M., Spreafico, R., Avanzini, G., Mascheroni, S., Vecchio, I., Tornali, C., Antonuzzo, A., Grasso, A. A., Bella, R., Pennisi, G., Raffaele, R., Broeckx, J., Schildermans, F., Hospers, W., Deberdt, W., Carney, J. M., Aksenova, M., Chen, M. S., Juncadella, M., Busquets, N., De la Fuente, I., Rodriguez, A., Rubio, F., Soler, R., Khati, C., Pillon, B., Deweer, B., Malapani, C., Malichard, N., Dubois, B., Rancurel, G., Lopez, D. L., Jungreia, G., DeKosky, S. T., Boiler, F., Weiller, C., Rijntjes, M., Mueller, S. P., Maguire, E. A., Burke, E. T., Staunton, H., Phillips, J., Rousseaux, M., Pena, J., Bertran, I., Santacruz, P., Lopez, R., Catafau, A., Lomena, F., Blesa, R., Rampello, L., Nicoletti, A., Cabaret, M., Lesoin, F., Steinling, M., Tournev, I., Maier-Hauff, K., Schroeder, M., Wolf, A., Cochin, J. P., Noel, I., Augustin, P., Auzou, P., Hannequin, D., Maria, V., Lopez-Bresnahan, Danielle, D. M., Antin-Ozerkis B. A., Bartels, E., Rodiek, S. O., Flugel, K. A., Campos, D. M., Salas-Puig, J., Del Rio, J. Sanhez, Vidal, J. A., Lahoz, C. H., Eraksoy, M., Barlas, O., Barlas, M., Bayindir, C., Ozcan, H., Birbamer, G., Gerstenbrand, F., Felber, S., Luz, G., Aichner, F., Seidel, G., Kaps, M., Hutzelmann, A., Gerriets, T., Kruggel, F., Martin, P. J., Gaunt, M. E., Abbot, R. J., Naylor, A. R., Meary, E., Dilouya, A., Meder, J. F., De Recondo, J., Lebtahi, R., Neff, K. W., Meairs, S., Viola, S., Matta, E., Aquilone, L., Rise, I. R., Authier, F. J., Kondo, H., Ghnassia, R. T., Degos, J. D., Gherardi, R. K., Bardoni A., Ciafaloni E., Comi G. P., Bresolin N., Robotti M., Moggio M., Rigoletto C., Roses A., Scarlato G., Castelli, E., Turconi, A., Bresolin, N., Perani, D., Felisari, G., Chariot, P., de Pinieux, G., Astier, A., Jacotot, B., Gherardi, R., Fischer-Gagnepain, V., Louboutin, J. P., Crespo, F., Florea-Strat, A., Fromont, G., Sabourin, J. -C., Gonano, E. -F., Moroni, I., Prelle, A., Iannaccone, S., Quattrini, A., deRino, F., Sessa, M., Golzi, V., Smirne, S., Nemni, R., Turpin, J. C., Lucotte, G., Jacobs, S. C. J. M., Willems, P. W. A., Bootsma, A. L., Lasa, A., Calaf, M., Baiget, M., Gallano, B., Fichter-Gagnepain, V., Mazzucchelli, F., D'Angelo, M. G., Velicogna, M., Bet, L., Comi, G. P., Bordoni, A., Gonano, E. F., Bazzi, P., Rapuzzi, S., Moggio, M., Fagiolari, G., Ciscato, P., Messina, A., Battistel, A., Ryniewicz, B., Sangla, I., Desnuelle, C., Paquis, V., Cozzone, P. J., Bendahan, D., Sturenburg, H. J., Kohncke, G., Castellli, E., Linssen, W., Stegeman, D., Binkhorst, R., Notermans, S., Jaspert, A., Fahsold, R., de Munain, A. Lopez, Cobo, A., Martorell, L., Poza, J. J., Navarrete Palau, D., Emparanza, J. I., Sanchez-Roy, R., Vilchez, J. J., Hernandez, M., Tena, J. Garcia, Perla, C., Koutroumanidis, M., Papathanasopoulos, P., Papadimitriou, A., Papapetropoulos, T. H., Divari, R., Hadjigeorgiou, G. M., Anastasopoulos, I., Sansone, V., Rotondo, G., Meola, G., Rigoletto, C., Messina, S., Szwabowska-Orzeszko, E., Jozwiak, S., Michalowicz, R., Szaplyko, W., Petrella, M. A., Della Marca, G., Masullo, G., Mennuni, G. F., Kompf, D., Wascher, E., Verleger, R., Kaido, M., Soga, F., Toyooka, H., Bayon, C., Rubio, J., Carlomagno, S., Parlato, V., Santoro, A., Lavarone, A., Bonavita, V., Pentore, R., Venneri, A., Pasquier, F., Lebert, F., Grymonprez, L., Lefebvre, C., Van der Linden, M., Derouesné, C., Renault, B., Lacomblez, L., Homeyer, P., Ouss, L., Neuman, E., Malbezin, M., Barrandon, S., Guez, D., Stevens, M., van Swieten, J. C., Franke, C. L., Sanchez, A., Castellvirel, S., Mila, M., Jimenez, D., Pallesta, F., Ruiz, P. J. Garcia, Barrio, A., Barroso, T., Benitez, J., de Yebenes, J. Garcia, Manubens, J. M., Martinez-Lage, J. M., Larumbe, R., Muruzabal, J., Lacruz, F., Quesada, Pedro, Gallego, J., Ferini-Strambi, L., Marcone, A., Garancini, P., Tedesi, B., Jacob, B., Rozewicz, L., Langdon, D., Davie, C., Ron, M., Thompson, A., Koepp, M. J., Hansen, M. L., Guldin, B., Pressler, R. M., Ried, S., Scholz, C., Monaco, F., Gianelli, M., Schiavalla, M. P., Naldi, P., Cantello, R., Torta, R., Verze, L., Mutani, R., Knott, H., Ferbert, A., Schulze-Bonhage, A., Aust, W., Di Mascio, R., Marchioli, R., Vitullo, F., Di Pasquale, A., Sciulli, L., Kramer, V., Tognoni, G., Santacruz, P., Lopez, R., Marti, M. J., Charques, I., Catafau, A., Lomeila, F., Peila, J., Bertran, I., Blesa, R., Krendel, D. A., Costiga, D. A., Koeppen, S., Korn, W. M., Brugge, S., Schmitz, D., Scheulen, M. E., King, R. H. M., Robertson, A. M., Thomas, P. K., Kerkhofs, A., Vermersch, P., Dereeper, O., Daems Monpeun, C., Parent, M., Deplanque, D., Petit, H., Campero, M., Serra, J., Ochoa, J. L., Martinez-Matos, J. A., Montero, J., Olivé, M., Rene, R., Vidaller, A., Gugenheim, M., Gouider, R., Le Guern, E., Brice, A., Agid, Y., Bouche, P., Grisold, W., Ziflo, U., Drlicek, M., Budka, H., Jellinger, K., Zielinski, C. H., Ginsberg, L., King, R. H. M., Workman, J., Platts, A. D., Thomas, P. K., Gherardi, R. K., Florea-Strat, A., Poron, F., Sabourin, J. -C., Fazio, R., Nemni, R., Franceschi, M., Lorenzetti, I., Rinaldi, L., Canal, N., Weilbach, F. X., Sennlaub, A., Jung, S., Gold, R., Toyka, K. V., Hartung, H. P., Giegerich, G., Ellie, E., Vital, A., Steck, A. J., Vital, C., Julien, J., Doneda, P., Pizzul, S., Scarpini, E., Chiodi, P., Ramacci, M. T., Livraghi, S., Maimone, D., Annunziata, P., Salvadori, C., Guazzi, G. C., Arne-Bes, M. C., Delisle, M. B., Fabre, N., Hurtevent, J. F., Bes, A., Baudoin-Martin, D., Laborde, E., Viallet, F., Creisson, C., Crespi, V., Bogliun, G., Marzorati, L., Zincone, A., D'Angelo, L., Liberani, A., Merlini, M., Rivolta, R., Creange, A., Sabourin, J. -C., Theodorou, I., Gherardi, R. K., Conti, A. M., Malosio, M. L., Baron, P. L., Scarlato, G., Chorao, R., Rosas, M. J., Leite, I., Callea, L., Donati, E., Bargnani, C., Bud, M., Verdu, E., Navarro, X., Braun, S., Einius, S., Poindron, P., Warier, J. M., Bradley, J., Bekkelund, S. I., Torbergsen, T., Mellgren, S. I., Carlomagno, S., Parlato, V., Santoro, A., Lavarone, A., Boller, F., Bonavita, V., Engelhardt, A., Lörler, H., Robeck, S., Kluglein, C., Comi, G., Avoledo, V., Locatelli, T., Leocani, L., Galardi, G., Magnani, G., Medaglini, S., Chkhikvishvili, T. S., Zangaladze, A., Bratoeva, M., Kovachev, P., Chavdarov, D., Artemis, N., Karacostas, D., Milonas, I., Arpa, J., Lopez-Pajares, R., Cruz-Matinez, A., Sarria, J., Palomo, F., Alonso, M., Rodriguez-Al-barino, A., Lacasa, T., Nos, J., Barreiro, P., Martinez, A. Cruz, Villoslada, C., Alons, M., Taghavy, A., Hamer, H., Kratzer, A., Dethy, S., Pauwels, T., Monclus, M., Luxen, A., Goldman, S., Ziegler, M., Crambes, O., Ragueneau, I., Arnaud, F., Zappia, M., Montesanti, R., Colao, R., Palmieri, A., Branca, D., Nicoletti, G., Rizzo, M., Parlato, G., Quattrone, A., Vanacore, N., Zuchegna, P., Bonifati, V., Meco, G., Scholz, J., Friedrich, H. -J., Rohl, A., Ulm, G., Vieregge, P., Savettieri, G., Rocca, W. A., Meneghini, F., Grigoletto, F., Morgante, L., Reggio, A., Salemi, G., Di Pierri, R., OzckmekÇi, S., Ertan, S., Yeni, N., Apaydin, H., Erkol, G., Kiziltan, G., Denktas, F., Ranoux, D., de Recondo, J., Ostergaard, L., Werdelin, L., Odin, P., Lindvall, O., Dupont, E., Christensen, P. B., Boisen, E., Jensen, N. B., Schmiegelow, M., Ingwersen, S. H., Matias-Guiu, J., Canet, T., Falip, R., Martin, R., Galiano, L., Voloshin, M. Y., Burchinskaya, L. F., Cabrera-Valdivia, F., Jimenez-Jimenez, F. J., Molina, J. A., Fernandez-Calle, P., Vazquez, A., Canizares-Liebana, F., Larumbe-Lobalde, S., Ayuso-Peralta, L., Rabasa, M., Codoceo, R., Arrieta, F. J., Aguilar, M. V., Jorge-Santamaria, A., Martinez-Para, M. C., Alarcon, J., Mateo, D., Gimenez-Roldan, S., Gencheva, E., Tzonev, T. z., Georgiev, G., Petkova, P., Gasparini, M., Vanacore, N., Meco, N. G., de la Sierra, G., Aguado, F., Revilla, M., Varela, L., Rico, H., Feve, A., N'Guyen, J. P., Bathien, N., Fenelon, G., Veroust, J., Cesaro, P., Egersbach, G., Hattig, H., Schelosky, L., Wissel, J., Poewe, W., Durif, F., Albuisson, E., Debilly, B., Tournilhac, M., Magnani, C., Mocellini, C., Soffietti, R., Schiffer, D., Cardozo, A., Cruz-Sanchez, F. F., Falip, L., Potagas, G., Ziegler, M., Rondot, P., Bonifati, V., Fabrizio, E., Meco, G., Bostantjopoulou, S., Katsarou, Z., Kyriazis, G., Baas, H., Demisch, L., Esser, A., Zoeller, F., Burklin, F., Harder, S., Fischer, P. A., Arcusa, M. J., Hermandez, S., Claramonte, F. J., Pascual, A. Pascual- Leone, Alonso, M. D., Catata, M. D., Alessandri, A., Giustini, P., Dufour, A., Ciusani, E., Nespolo, A., Roelcke U., Radu E. W., von Ammon K., Maguire R. P., Leenders K. L., Radionova, M., Chavdarov, D., Bratoeva, M., Tzekov, Ch., Pietrangeli, A., Bove, L., Pace, A., Falqui, L., Jandolo, B., Potemkowski, A., Muller B., Reinhard I., Krone A., Warmuth M., Brocker E. M., Krauseneck P., Meyding-Lamadé, U., Krieger, D., Sartor, K., Hacke, W., Maugard-Louboutin, C., Fayet, G., Sagan, C., Martin, S., Ménégalli, D., Lajat, Y., Resche, F., Koriech, O. M., Al Moutaery, K., Yaqub, B., Jochens, R., Wolters, A., Venz, S., Cordes, M., Hecht, B. K., Chatel, M., Gaudray, P., Turc-Carel, C., Gioanni, J., Ayraud, N., Hecht, F., Rumbach, L., Racadot, E., Bataillard, M., Billot, M., Pariset, J., Wijdenes, J., Montalban, Rio J., Tintoré, M., Galan, I., Acarin, N., Rapaport, S., Huberman, M., Shechtcr, D., Karabudak, R., Kilinc, M., Boyacigil, S., Cila, A., Polo, J. M., Setien, S., Sanchez, R., Figols, J., Zubimendi, A., Nadareishvili, Z. G., Massot, R., Marés, R., Gallecho, F., Richart, C., Hernandez, M. A., Garcia, M. R., Lorenzo, J. N., Leon, C., Muros, M., Togores, J., Kutluk, K., Damlacik, G. A., Tekinsoy, B., Obuz, O., Baklan, B., Idiman, E., Genc, K., Zielasek, J., Schmidt, B., Liew, F. Y., Gulay, Z., Yulug, N., Wong, K. S., Wong, T. W., Yu, T. S., Kay, R., Poupon, R., Giral, P., Roberti, C., Zanette, E. M., Chiarotti, F., Brusa, L., Cerbo, R., Prusinski, A., Pondal, M., Canton, R., Dominigo, Erodriguez J., Pereira Monteino J. M., Pereira Monteino X., Pardo, J., Carroacedo, A., Barros, F., Lema, M., Castillo, J., Melchor, A., Montiel, I., Guiu, J. Matias, Kloss, T. M., Keidel, M., Jacob, M., Idiman, F., Idman, E., Ozturk, V., Metin, E., Yilmaz, M., Gerard, J. M., Bouton, R., Decamps, D., Herbaut, A. G., Delecluse, F., Cavenaile, M., Divano, L., Chazot, G., Boureau, F., Emile, J., Bertin, L., d'Allens, H., Ferro, J. M., Costa, I., Carletto, F., Catarci, T., Padovani, A., Iandolo, B., Bartoli, M., Bonamini, M., Pulcinelli, F., Pignatelli, P., Russo, M., Gazzaniga, P. P., Barros, J., Pinheiro, J., Correia, A. P., Monteiro, J. M. Pereira, Alvarez-Cermeno, J. C., Avello, G., Sastre, J. L., Vecino, A., Cesar, J. M., Leone, M., Stankov, B., D'Amico, D., Maltempo, C., Moschian, F., Fraschini, F., Bussone, G., Molto, J. M., Fernandez, E., Fernandez, A. Morento, Barreiro, A., Siclia, J., Castejon, P., Mihout, B., Malberin, M., Salzman, V., Bogousslavsky, J., Meneghetti, G., Baracchini, C., Bozzato, G., Marini, B., Mendel, T., Czlonkowska, A., Pasierski, T., Szwed, H., Marta-Moreno, J., Lopez-Delval, J., Mostacero, E., Morales, F., Mahagne, M. H., Rogopoulos, A., Bertrand, F., Bedoucha, P., Lanteri-Minet, M., Riva, D., Zorzi, C., Milani, N., Vajsar, J., Ronen, G., Macgregor, D., Becker, L., Susseve, J., Seidl, Z., Faber, J., Obenberger, J., Springer, R., Bax, R. T., Eckardt, T., Czettritz, G. V., Emmrich, P., Vlaski-Jekic, S., Petrova, V., Cherninkova, S., Gudeva, T., Tzekov, C., Devoti, M., Franceschetti, S., Mientus, S., Vienna, P., Vashtang, Y., Tazir, M., Assami, S., Oulbani, D., Kaci Ahmed, M. Ait, Andersen, G., Vestergaard, K., Riis, J. O., Chavdarov, D., Corbo, M., Previtali, S., Allen, R. R., McKay, W. C., Rowbotham, M. C., Castellvi-Pel, S., Banchs, I., Kruyer, H., Corral, J., Saugeir-Veber, P., Munnich, A., Bonneau, D., Rozet, J. M., Le Merrer, M., Boespflug-Tanguy, O., Gokyigit, A., Oktem, O., Demir, G., Caliskan, A., Gardiner, R. M., Shorvon, Simon, Wieser, Heinz -Gregor, Hossmann, K. A., Steinberg, A., van Crevel, H., Ducros, A., Labauge, P., Pinsard, N., Ponsot, G., Gouttiere, F., Gastaut, J. L., Delrieu, O., BesanÇon, V., Klopstock, T., May, A., Seibel, P., Papagiannuli, E., Reichmann, H., Gurses, C., Aykut, C., Aktan, S., De Vuono, G., Fiacco, F., Gazzaniga Pozzill, P. P., Assuerus, V., Jacomet, C., Picard, O., Rozenbaum, W., Nueckel, M., Osschmann, P., Horning, C. R., Caldarelli-Stefano, R., Omodeo-Zorini, E., Rivolta, G. E., Maserati, R., Cagni, A., Ferrante, P., Lamadé, W., Heb, Th., Gosztonyl, G., Daral, G., Fresquet, C., Storch-Hagenlocher, B., Wildemann, B., Jager, G., Fuhry, L., Van Paesschen, W., Grunewald, R. A., Duncan, J. S., Connelly, A., Jackson, G. D., Sisodiya, S., Raymond, A. A., Shorvon, S. D., Fish, D. R., Stevens, J. M., Savic, I., Pauli, S., Thorell, J. O., Browne, R. H., Kornhuber, J., Retz, W., Riederer, P., Boon, F., Calliauw, L., Hoksergen, I., Thiery, E., Caemert, J., Decoo, D., Desomer, A., Chevalier, Y., Grinspan, A., Hirsch, E., Moszkowski, J., Marescaux, C., Yaqub, B. A., Valdueza, J. M., Puchner, M. J. A., Dammann, O., Vortmeyer, A., Herrmann, H. -D., Peterson, W., Prevett, M. C., Cunningham, V., Brooks, D. J., Pomes, A., Sunol, C., Durwen, H. F., Confavreux, Ch., Grimaud, J., Saddier, P., Moreau, T., Cortinovis-Tourniaire, P., Aimard, G., Adeleine, P., Paty, D. W., Wiles, C. M., Midgard, R., Riise, T., Kvale, G., Nyland, H., Stodal, H., Haase, A., Lassmann, H., Deeb, S. M. Al., Bruyn, G. W., Semana, G., Teisserenc, H., Alizadeh, M., Loiseau, P., Birebent, B., Yaouanq, J., Genetet, B., Sabouraud, O., Charron, D. J., Shaw, C. E., Stelmasiak, C., Solski, J., Nowicki, J., Jakubowska, B., Ryba, M., Grieb, P., Garcia-Merino, A., Usuku, K., Yunis, E., Alper, C., Hauser, S. L., Betuel, H., Gebuhrer, L., Salier, J. P., Kellar-Wood, H., Govan, G. G., Bromberg, J. E. C., Rinkel, G. J. E., Algra, A., Moulin, T., Stojkovic, T., Chavrot, D., Klotzsch, C., Kaiser-Rub, K., Nahser, H. C., Klijn, C. J. M., Tulleken, C. A. F., Rappelle, L. J., Daffertshofer, M., Kother, J., Hornig, C. R., Rust, D. S., Busse, O., Laun, A., Corabianu, O., Berbinschi, A., Chastang, C., Cophignon, J., Haguenau, M., Ketelslegers, J. M., Jander, S., Kramer, M., Schröter, M., Witte, O. W., Stoll, G., Möbner, R., Barak, V., Sarova-Ponchas, I., Holon, Le Coz, P., Woimant, F., George, B., Merland, J. J., Chleide, E., Casademont, J., Barrientos, A., Cardellach, F., Cervantes, F., Grau, J. M., Montoya, J., Rozman, C., Urbano-Marquez, A., Nunes, V., Lane, R. J. M., Archard, L. C., Schapira, A. H. V., Cooper, J. M., Barnes, P. R. J., Kemp, G. 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M., Pleiffer, G., Kunre, K., Dieterich, M., Brandt, Th., Guarino, M., Stracciari, A., Pazzaglia, P., D'Alessandro, R., Santilli, I., Donato, M., The European Velnacrine Study Group, The Dutch Guillain-Barré study group, The COP-1 Multicenter Clinical and Research Group Study, and European Study Group
- Published
- 1994
- Full Text
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8. AUTONOMIC NERVOUS SYSTEM AND STROKE.
- Author
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Velcheva, I. and Mantarova, S.
- Subjects
AUTONOMIC nervous system ,HEART beat ,CEREBRAL circulation ,DYSAUTONOMIA ,INSULAR cortex - Abstract
Dysfunction of the autonomic nervous system (ANS) is common in stroke. It may be due in part to increased sympathetic activity during the acute stroke period or to a pre-existing dysautonomia due to comorbid conditions and risk factors such as diabetes, dyslipidemia, aging, arterial hypertension, cardiac diseases. Disturbances of the central autonomic network, which includes grey matter structures in the brain and brainstem, lead to ANS dysfunction, presented with cardiovascular, respiratory, gastrointestinal, sudomotor, sexual and urinary dysfunction. Markers of autonomic dysfunction like heart rate variability and baroreflex sensitivity are reduced in acute stroke locations like the insular cortex, particularly the right-sided and also the frontal and parietal brain lobes. The increased sympathetic activity may increase platelet aggregation, promote vasoconstriction, decrease fibrinolysis, increase pulse and blood pressure and impair the cerebral autoregulation. It may also contribute for development of small vessel disease. Therapeutic strategies are aimed at restoring the sympathetic-vagal balance through sympathetic antagonism and parasympathetic activation. These are applying of sympatholytic agents, physical exercise, stopping of smoking and alcohol abuse and psychological adjustment. [ABSTRACT FROM AUTHOR]
- Published
- 2024
9. P2.47 Carotid Pathology and Risk Factors in Hypertensive Patients for Cerebrovascular Disease - Correlative Clinical, Neurosonographic and Echocardiographic Studies
- Author
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Hristova, K., Hristova, K., Titianova, E., Velcheva, I., Dimitrov, N., Karakaneva, S., Damianov, P., and Ramshev, K.
- Published
- 2008
- Full Text
- View/download PDF
10. CHLORPYRIFOS INDUCED CHANGES ON THE PHYSIOLOGY OF COMMON CARP (CYPRINUS CARPIO LINNAEUS, 1785): A LABORATORY EXPOSURE STUDY
- Author
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YANCHEVA, V, primary, VELCHEVA, I, additional, GEORGIEVA, E, additional, MOLLOV, I, additional, and STOYANOVA, S, additional
- Published
- 2019
- Full Text
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11. Microvascular reactivity to thermal stimulation in patients with diabetes mellitus and polyneuropathy
- Author
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Stoyneva, Z., primary, Velcheva, I., additional, Antonova, N., additional, and Titianova, E., additional
- Published
- 2017
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12. Venoarteriolar reflex responses in diabetic patients
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Stoyneva, Z., primary, Velcheva, I., additional, Antonova, N., additional, Titianova, E., additional, and Koleva, I., additional
- Published
- 2017
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- View/download PDF
13. Comparative study between microvascular tone regulation and rheological properties of blood in patients with type 2 diabetes mellitus
- Author
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Antonova, N., primary, Tsiberkin, K., additional, Podtaev, S., additional, Paskova, V., additional, Velcheva, I., additional, and Chaushev, N., additional
- Published
- 2017
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- View/download PDF
14. GLYPHOSATE-BASED HERBICIDE ALTERS THE HISTOLOGICAL STRUCTURE OF GILLS OF TWO ECONOMICALLY IMPORTANT CYPRINID SPECIES (COMMON CARP, CYPRINUS CARPIO AND BIGHEAD CARP, ARISTICHTHYS NOBILIS).
- Author
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GEORGIEVA, E., YANCHEVA, V., VELCHEVA, I., MOLLOV, I., TODOROVA, K., TOMOV, S., TSVETANOVA, V., and STOYANOVA, S.
- Subjects
GLYPHOSATE ,HERBICIDES ,GILLS ,CYPRINIDAE ,CARP ,BIGHEAD carp - Abstract
The present study primarily aims to investigate the histopathological effects which a glyphosate based herbicide could cause on the gills of two economically important Cyprinid fish (common carp and bighead carp), and to determine which species is more sensitive in terms of glyphosate contamination. The pesticide concentrations tested in laboratory conditions were decreasing (72 mg/l, 40 mg/l and 20 mg/l) and prepared by dilution of the stock solution of the commercial product used in plant protection. The experiment was short-term of 96 h. In general, the herbicide caused different pathological alterations in the fish gills, such as lamellar lifting, edema, proliferation of the glandular cells and epithelium, covering the gill filament, fusion, vasodilatation of the secondary lamellae and aneurysms. In addition, we observed a tendency towards the enhancement of the gill histological changes which degree of expression was proportional to the increasing pesticide concentrations. However, bighead carp was more sensitive compared to common carp when it comes to the tested chemical and the alterations in the gill histological structure were more pronounced. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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- View/download PDF
15. STENOSIS EFFECTS ON THE FLUID MECHANICS OF THE COMMON CAROTID ARTERY BIFURCATION FOR UNSTEADY FLOWS
- Author
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ANTONOVA, N., primary, XU, D., additional, VELCHEVA, I., additional, KALIVIOTIS, E., additional, and TOSHEVA, P., additional
- Published
- 2015
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16. Characteristic parameters derived from whole blood viscometry in cerebrovascular disease
- Author
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Antonova, N. and Velcheva, I.
- Subjects
ВЯЗКОСТЬ КРОВИ, ВЯЗКОСТЬ ПЛАЗМЫ, ПАРАМЕТР ЖЕСТКОСТИ КРОВИ, ЦЕРЕБРАЛЬНОСОСУДИСТЫЕ ЗАБОЛЕВАНИЯ - Abstract
Были проведены экспериментальные исследования вязких свойств крови у 19 здоровых и 21 больных пациентов с церебральнососудистыми заболеваниями. Для этого применялись капиллярные вискозиметры и вискозиметры с вращающимся цилиндром. В исследовании использовался параметр жесткости h, который включает абсолютную и относительную вязкость крови, а также вязкость плазмы. Эксперименты показали, что у больных пациентов наблюдается повышение вязкости крови во всем диапазоне скоростей сдвига. Применение метода чувствительности позволяет диагностировать очень малые изменения вязкости крови. Найдено также весьма сложное соотношение между параметром жесткости и вязкостью плазмы. Отмечается, что вязкость крови и параметр жесткости крови являются весьма полезными критериями для оценки церебральнососудистых заболеваний. Библ. 21., Nineteen controls and twenty one patients with cerebrovascular disease have been investigated with the Contraves LS 30 rotating cylinder viscometer and laboratory done capillary viscometers of Ubbelohde type. The present investigation uses the rigidity number "h", defined by the "Tokyo" expression of R.B.Whittington and J.Harkness [18], which itself incorporates both absolute and relative viscosity, as well as examination of the plasma viscosity. The results can basically be divided into two components: a viscous one (A) and an elastic non-Newtonian one (ѓТ). These are constant characteristics of the blood sample, quite independent on the hematocrit and on stresses imposed upon the blood during measurement. When the transferred in X and Y components are plotted, two distinct curves, patients' and controls' results touch. They are presented in a domain, suitable for indicating the difference between viscous and elastic forces. The blood rigidity number "h" as a function of plasma viscosity with evident periodicity is determined. A concentration range of blood cholesterol regarding ("h" blood cholesterol) dependence in which h increases rapidly is found. The larger number of patients, diagnosed as being positive for cerebrovascular disease are confirmed by a criterion, including viscosity and rigidity number "h".
- Published
- 1999
17. Numerical analysis of 3D blood flow and common carotid artery hemodynamics in the carotid artery bifurcation with stenosis
- Author
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Antonova, N., primary, Dong, X., additional, Tosheva, P., additional, Kaliviotis, E., additional, and Velcheva, I., additional
- Published
- 2014
- Full Text
- View/download PDF
18. Comparative study between microvascular tone regulation and rheological properties of blood in patients with type 2 diabetes mellitus.
- Author
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Antonova, N., Tsiberkin, K., Podtaev, S., Paskova, V., Velcheva, I., and Chaushev, N.
- Subjects
MICROCIRCULATION disorders ,TYPE 2 diabetes complications ,PEOPLE with diabetes ,SKIN temperature ,VISCOSIMETERS ,MICROCIRCULATION ,DISEASE risk factors - Abstract
The aim of the study is to investigate the changes of the skin blood flow responses to cold stress in patients with diabetes mellitus type 2 through wavelet analysis of the peripheral skin temperature oscillations and to estimate their relationship with the blood viscosity values. The amplitudes of the skin temperature pulsations (ASTP) were monitored by "Microtest" device ("FM-Diagnostics", Russia); the whole blood viscosity and the shear stresses were measured by Contraves LS30 viscometer (Switzerland) at a steady flow in 9 healthy subjects and in 30 patients with type 2 diabetes mellitus. Power law and Herschel-Bulkley (HB) equations were applied to describe the blood rheology. Both models include consistency (k) and flow index (m), and the HB also gives the yield stress (τ
0 ). The Spearman rank correlations between these parameters and the ASTP in the frequency ranges, corresponding to the myogenic, neurogenic and endothelial mechanisms of the microcirculation tone regulation were calculated. The ASTP values decreased when the blood viscosity increased. The correlation analysis revealed good ASTP-m (r > 0.5) and ASTP-k (r < -0.5) relationships in the endothelial range, while the ASTP-τ0 correlation was weaker (r≈-0.4). These correlations became lower for the ASTP during the cold stress. The results prompt manifestation of endothelial dysfunction in patients with type 2 diabetes. [ABSTRACT FROM AUTHOR]- Published
- 2016
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- View/download PDF
19. Changes in the Erythrocytes Indexes ofCarassius Gibelio(Pisces, Cyprinidae) under the Influence of Zinc
- Author
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Arnaudov, A., primary, Velcheva, I., additional, and Tomova, E., additional
- Published
- 2009
- Full Text
- View/download PDF
20. A Review of the Influence of the Urbanization on the Vertebrate Fauna in the City of Plovdiv
- Author
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Mollov, I., primary, Georgiev, D., additional, Todorova, B., additional, Stoycheva, Sl., additional, Velcheva, I., additional, and Nikolov, B., additional
- Published
- 2009
- Full Text
- View/download PDF
21. Hemorheological disturbances and cognitive function in patients with cerebrovascular disease
- Author
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Velcheva, I., primary and Nikolova, G., additional
- Published
- 2008
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- View/download PDF
22. Hemorheological disturbances in cerebrovascular diseases
- Author
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Velcheva, I., primary, Antonova, N., additional, Titianova, E., additional, Damianov, P., additional, Dimitrov, N., additional, and Dimitrova, V., additional
- Published
- 2008
- Full Text
- View/download PDF
23. 5-07-26 Cerebral embolism as a risk factor for CVD: A TCD monitoring
- Author
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Velcheva, I., primary, Titianova, E., additional, Strahilova, T., additional, and Alexandrova, D., additional
- Published
- 1997
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- View/download PDF
24. 3-03-04 Cardiovascular, cerebrovascular and catecholamine responses to orthostatic stress in patients with hypothalmatic lesions
- Author
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Velcheva, I., primary, Zaprianova, L., additional, Titianova, E., additional, Dimitrova, V., additional, Stamenova, P., additional, and Gerassimov, B., additional
- Published
- 1997
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- View/download PDF
25. F190. Blood viscosity measurements in patients with cerebral ischemia
- Author
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WHITTINGTON, R, primary, ANTONOVA, N, additional, VELCHEVA, I, additional, MARINOVA, T, additional, and BOEVA, D, additional
- Published
- 1995
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26. Allelopathic Effect of Dodder on Different Varieties of Lucerne and Bird’s Foot-Trefoil
- Author
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Valcheva Ekaterina, Popov Vladislav, Zorovski Plamen, Golubinova Irena, Marinov-Serafimov Plamen, Velcheva Iliana, and Petrova Slaveya
- Subjects
allelopathy ,cuscuta epithymum ,medicago sativa ,lotus corniculatus ,Agriculture - Abstract
The aim of this study was to evaluate the allelopathic effect of cold aqueous extracts, both fresh and dry biomass of dodder (Cuscuta epithymum L.) on lucerne (Medicago sativa L.) and bird’s foot-trefoil (Lotus corniculatus L.). Four different varieties of lucerne “Pleven 6”, “Dara”, “Roly”, “Multifoliolate”) and bird’s foot-trefoil (“Gran San Gabriele”, “Leo”, “Local population 1”, “Local population 2”) were studied in order to find some varieties with allelopathic tolerance. Ex-situ experiment was carried out as follows: 100 seeds of each variety were put in Petri dishes between filter paper, both cold extracts of parasitic weed biomass were pipetted at a ratio of 1:20 as against the seed mass and then were placed in a thermostat-operated device at a temperature of 22 ± 2°С. Distilled water was used as a control. Percentage inhibition, Index of tolerance and Index of plant development were calculated for assessment of the allelopathic effect of dodder on the early seedling growth, biomass synthesis and initial development of experimental varieties. As a whole, dry weed biomass was found as more toxic for the tested plants than the fresh one. Medicago sativa var. multifoliolate and Lotus corniculatus var. Local population 1 and Local population 2 showed a significant tolerance to the allelopathic influence of Cuscuta epithymum in all studied concentrations of aqueous extract of fresh weed biomass (25, 50 and 100 g l−1) and medium tolerance to aqueous extract of dry weed biomass (concentrations of 25 and 50 g l−1).
- Published
- 2018
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- View/download PDF
27. Posters, Tuesday 17 October.
- Author
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Titianova, E., Velcheva, I., Nader, J., Smajlovic, D., Tupkovic, E., Kapidzic, A., Sinanovic, O., Sievart, H., Bösenberg, I., Theis, R., Beykirch, K-F., Pfeil, W., Rubel, C., Ensslen, R., Fach, A., Spies, H., Merle, H., and Toncev, S.
- Subjects
- *
NEUROLOGY , *CEREBROVASCULAR disease - Abstract
Presents several abstracts on neurology. 'Neuroimaging Testing of the Clinical Classification of Ischemic Stroke'; Carotid Angioplasty and Stent Implantation: Acute and Follow-up Results in 100 Consecutive Lesion'; ultrasonography for Asymptomatic Carotid Stenosis in Patients with Peripheral Vascular Disease.'
- Published
- 2000
28. Effects of Aging and Hematocrit on Cerebral Blood Flow Velocity in Patients with Unilateral Cerebral Infarctions: A Doppler Ultrasound Evaluation.
- Author
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Titianova, E. B., Velcheva, I. V., and Mateev, P. S.
- Subjects
HEMATOCRIT ,CEREBRAL circulation ,BLOOD circulation ,CEREBRAL infarction ,CEREBROVASCULAR disease ,ULTRASONIC imaging - Abstract
By means of conventional continuous-wave (CW) (4 MHz) and transcranial pulsed (2 MHz) Doppler sonography 50 patients (34 men and 16 women, mean age 58.6 ±7.6 years) who survived unilateral cerebral infarctions (UCI) in the middle cerebral artery (MCA) territory were investigated. The control group consisted of 30 presumed healthy age-matched persons. The main quantitative sonographic parameters of the major arteries of the head and the basal cerebral arteries were evaluated. On the day of the neurosonographic investigations, hematocrit (Hct) was determined. Low-degree stenoses of the internal carotid arteries were found in 26 (52%) of the patients. Increased intracranial vessels' resistance in the MCA on the infarction side was usually obtained. Decreasing of Doppler shift frequency with advancing age and increasing of Hct was established in the controls. In patients with UCI the effects of aging and Hct on the sonographic parameters of the collateral arteries were more pronounced. Obviously, in patients with UCI, the alterations of the sonographic parameters are caused by parallel influence of vessels' disease, age-defined changes of vessels' walls, and viscosity variations. [ABSTRACT FROM AUTHOR]
- Published
- 1993
- Full Text
- View/download PDF
29. Histological alterations under metal exposure in gills of European perch (Perca fluviatilis L.) from Topolnitsa Reservoir (Bulgaria)
- Author
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Georgieva Еlenka, Yancheva Vesela, Velcheva Iliana, Becheva Maria, and Stoyanova Stela
- Subjects
Cu ,bioaccumulation ,fish ,gills ,perch ,Biology (General) ,QH301-705.5 - Abstract
Topolnitsa Reservoir is located in a region of Bulgaria rich in copper mines where intensive mining has been ongoing for several decades. General data on the ecological status of the reservoir and the effects of metal on fish is relatively scarce. The first aim of the study was to measure the concentrations of six metals (As, Cd, Cu, Ni, Pb and Zn) in water samples and in the gills of European perch (Perca fluviatilis L.). The second objective was to examine gill structure and determine the severity of histological alteration as a result of metal exposure. Surface water and fish gill samples were collected in spring, summer and autumn in 2012 and metal and histological analyses were performed. Metal concentrations in the water samples varied, but only Cu concentrations were determined in all three seasons and they were higher than the maximum permissible levels. The gill metal concentrations were significantly higher (P
- Published
- 2015
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- View/download PDF
30. Metal effects on histological and biochemical parameters of common rudd (Scardinius erythrophthalmus L.)
- Author
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Georgieva Elenka, Stoyanova Stela, Velcheva Iliana, Vasileva Tonka, Bivolarski Veselin, Iliev , Ilia, and Yancheva Vesela
- Subjects
metals ,fish ,liver ,histology ,enzymes ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
The present study aimed to evaluate the current contamination status of Topolnitsa Reservoir, which is located in a region with intensive copper mining. The reservoir has been continually contaminated with metals over the last few decades. As, Cd, Cu, Ni, Pb, and Zn concentrations were measured in surface water samples and in the liver of common rudd, Scardinius erythrophthalmus (L.), in three different seasons: spring, summer, and autumn. The morphological structure of the fish liver was examined and the hepatic LDH, ALAT, and ASAT activities were measured. In general, metal concentrations in the water varied, but As and Cu were present in all three seasons at levels higher than the maximum permissible levels set by law. The metal concentrations in the fish liver were significantly higher than in the water. Histological alterations were classified as degenerative changes (granular, vacuolar, hydropic, and fatty degeneration), necrotic changes (necrobiosis) - karyopyknosis, karryorehsis, and karyolyzis, and necrosis)); and changes in blood vessels (hyperemia in sinusoids and major blood vessels). Higher LDH, ALAT, and ASAT activities in fish livers were measured in comparison to reference fish. In addition, the ALAT activity in the livers of S. erythrophthalmus from Topolnitsa Reservoir was significantly higher in the summer. Overall, it can be concluded that the metal-contaminated waters of Topolnitsa Reservoir lead to negative changes in the common rudd tissues at the cellular level including impaired structure and enhanced enzymatic activity in the fish liver.
- Published
- 2014
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- View/download PDF
31. Orthostatic dysregulation in progressive autonomic failure - a transcranial Doppler sonography monitoring
- Author
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Titianova, E., Karakaneva, S., and Velcheva, I.
- Published
- 1997
- Full Text
- View/download PDF
32. Gill tissue recovery after copper exposure in Carassius gibelio (Pisces: Cyprinidae)
- Author
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Velcheva Iliana, Georgieva Elenka, and Atanassova Pepa
- Subjects
histopathology ,gill epitelium ,heavy metal ,fish ,long-time exposure ,Biology (General) ,QH301-705.5 - Published
- 2013
- Full Text
- View/download PDF
33. Changes in the Erythrocytes Indexes of Carassius Gibelio(Pisces, Cyprinidae) under the Influence of Zinc
- Author
-
Arnaudov, A., Velcheva, I., and Tomova, E.
- Abstract
ABSTRACTThe erythrocytes indexes (MCV, MCH and MCHC) and the type of anaemia on Gibelio carp (Carassius gibelio) after influence of increasing zinc concentrations (0.1, 0.5, 1.0, 1,5 and 2.0 mg.l−1) were established. Size increasing of the erythrocytes (MCV) and decreasing the haemoglobin concentration in the whole blood (MCHC) and in one erythrocyte (MCH) caused by zinc were found. It was ascertained that the zinc causes a hypochrome type of anemia by all concentrations and was observed the trend of shift from microcyte to macrocyte type when zinc concentration increases.
- Published
- 2009
- Full Text
- View/download PDF
34. Cytotoxicity and genotoxicity of heavy metal and cyanide-contaminated waters in some regions for production and processing of ore in Bulgaria
- Author
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Ivanova, E., Teodora Staykova, and Velcheva, I.
35. A case study of Allelopathic effect of parsley, dill, onion and carrots on the germination and initial development of tomato plants
- Author
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Valcheva, E., Popov, V., Marinov-Serafimov, P., Golubinova, I., Nikolov, B., Velcheva, I., and Slaveya Petrova
- Subjects
vegetables ,organic farming ,lcsh:QH540-549.5 ,fungi ,allelopathy ,mixed crops ,food and beverages ,lcsh:Ecology - Abstract
Vegetables are important worldwide, but their production faces many problems. One of them is the yield decline due to soil sickness, allelopathic effects of other crops, weeds and trees, and also the autotoxicity when grown continuously for several years. For the purpose of organic farming, allelopathy can be an important element in balancing the relationship between density and weeds, pests, diseases and cultivars. Relationships among the vegetable species and varieties in particular mixed stand are not sufficiently explored, which is a sufficient reason to conduct such a study. The present study focuses on the allelopathic relationships in agrophytocenoses in order to assess the possibilities of mixed crop cultivation of tomato plants with other vegetable crops and spices. Vegetable species may have a negative, neutral or positive effect one to another when grown in mixed agrophytocenoses. To explore the extent of this impact, test plants from tomatoes have been treated directly with plant extracts from other vegetable plants - parsley, dill, onion and carrots. The study showed that the applied concentrations of parsley, carrot, dill and onion extracts had stimulating, inhibiting or indigenous effect on tomato seed germination, growth and accumulation of dry biomass. Seedling vigor index of plant development (SVIcm) and biomass synthesis (SVIg) depended on the type of the extract applied more than the concentration applied (p
36. Rheological properties of the blood and changes of oscillations in skin temperature after cold test in patients with type 2 diabetes mellitus
- Author
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Paskova, V., Nadia Antonova, Chaushev, N., and Velcheva, I.
37. Toxicological impact of a neonicotinoid insecticide and an organophosphorus fungicide on bighead carp (Hypophthalmichthys nobilis Richardson, 1845) gills: A comparative study
- Author
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Stoyanova, S., Krisztián Nyeste, Georgieva, E., Uchikov, P., Velcheva, I., and Yancheva, V.
38. Hemorheological parameters in correlation with the risk factors for carotid atherosclerosis
- Author
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Velcheva, I., Antonova, N., Titianova, E., Damianov, P., Dimitrov, N., and Ivan Ivanov
39. Molluscs (Mollusca: Gastropoda, Bivalvia) from the upper eocene of Perunika Village (East Rhodopes, Bulgaria) - Preliminary results
- Author
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Slaveya Petrova, Mehmed, E., Mollov, I., Georgiev, D., and Velcheva, I.
40. Herbicides influence the community structure of the soil mezofauna
- Author
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Velcheva, I., Petrova, S., Mollov, I., Gana Gecheva, and Georgiev, D.
41. Plasma lipids and blood viscosity in patients with cerebrovascular disease
- Author
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Velcheva, I., Antonova, N., Dimitrova, V., Dimitrov, N., and Ivan Ivanov
42. Rheological and electrical behaviour of blood in patients with diabetes mellitus type 2
- Author
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Paskova, V., Nadia Antonova, Ivanov, I., Velcheva, I., and Chaushev, N.
43. Carotid pathology and risk factors in hypertensive patients for cerebrovascular disease - correlative clinical, neurosonographic and echocardiographic studies.
- Author
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Hristova, K., Titianova, E., Velcheva, I., Dimitrov, N., Karakaneva, S., Damianov, P., and Ramshev, K.
- Published
- 2008
- Full Text
- View/download PDF
44. Assessment of trace and macroelement accumulation in cyprinid juveniles as bioindicators of aquatic pollution: effects of diets and habitat preferences.
- Author
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Nyeste K, Zulkipli N, Uzochukwu IE, Somogyi D, Nagy L, Czeglédi I, Harangi S, Baranyai E, Simon E, Nagy SA, Velcheva I, Yancheva V, and Antal L
- Subjects
- Animals, Environmental Monitoring methods, Diet, Gills metabolism, Rivers, Water Pollution analysis, Ecosystem, Cyprinidae metabolism, Water Pollutants, Chemical analysis, Trace Elements analysis, Trace Elements metabolism
- Abstract
Juveniles of three cyprinids with various diets and habitat preferences were collected from the Szamos River (Hungary) during a period of pollution in November 2013: the herbivorous, benthic nase (Chondrostoma nasus), the benthivorous, benthic barbel (Barbus barbus), and the omnivorous, pelagic chub (Squalius cephalus). Our study aimed to assess the accumulation of these elements across species with varying diets and habitat preferences, as well as their potential role in biomonitoring efforts. The Ca, K, Mg, Na, Cd, Cr, Cu, Fe, Mn, Pb, Sr, and Zn concentration was analyzed in muscle, gills, and liver using MP-AES. The muscle and gill concentrations of Cr, Cu, Fe, and Zn increased with trophic level. At the same time, several differences were found among the trace element patterns related to habitat preferences. The trace elements, including Cd, Pb, and Zn, which exceeded threshold concentrations in the water, exhibited higher accumulations mainly in the muscle and gills of the pelagic chub. Furthermore, the elevated concentrations of trace elements in sediments (Cr, Cu, Mn) demonstrated higher accumulation in the benthic nase and barbel. Our findings show habitat preference as a key factor in juvenile bioindicator capability, advocating for the simultaneous use of pelagic and benthic juveniles to assess water and sediment pollution status., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
- View/download PDF
45. Local carotid stiffness, hemodynamic forces and blood viscosity in patients with cerebral lacunar infarctions.
- Author
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Velcheva I, Antonova N, Kmetski T, Tsonevska G, Stambolieva K, Alexandrova A, and Bechev B
- Subjects
- Humans, Male, Female, Middle Aged, Aged, Carotid Intima-Media Thickness, Carotid Artery, Common physiopathology, Carotid Artery, Common diagnostic imaging, Carotid Artery, Common pathology, Pulse Wave Analysis, Carotid Arteries physiopathology, Carotid Arteries diagnostic imaging, Blood Viscosity physiology, Vascular Stiffness physiology, Hemodynamics physiology, Stroke, Lacunar physiopathology, Stroke, Lacunar blood, Stroke, Lacunar diagnostic imaging
- Abstract
Objective: The carotid stiffness is an important factor in the pathogenesis of cerebrovascular small vessel disease. Our study aimed to evaluate the relation of the local arterial stiffness of the common carotid artery (CCA) to the hemodynamic forces and blood viscosity in patients with cerebral lacunar infarctions (LI)., Methods: Twenty-two patients with chronic LI and 15 age-matched controls were examined. An ultrasound examination of the CCA intima-media thickness (IMT), the parameters of local CCA stiffness: distensibility (DC) and compliance coefficients (CC), α and β stiffness indices and pulse wave velocity (PWV) was performed. The local hemodynamic forces were calculated: circumferential wall tension (CWT) and wall shear stress (WSS). Whole blood viscosity (WBV) and shear stresses at shear rates of 0.277 s- 1 to 94.5 s- 1 were measured in patients and controls., Results: Higher values of IMT, a significant decrease of DC and CC and an increase of α and β stiffness indices and PWV in the LI patients compared to the controls were obtained. A parallel significant increase in CWT and a decrease in WSS was found. An increase in WBV and a significant increase in shear stresses were detected. In the LI patients, the increased stiffness indices were associated with an increase in age, cholesterol and WBV at higher shear rates in the left CCA. In the controls, the IMT and stiffness indices correlated significantly with the hemodynamic factors and WBV in both CCAs, while the stiffness indices correlated with the hemodynamic forces in the left CCA., Conclusion: The results of the present study demonstrate different associations of the local carotid stiffness indices with the hemodynamic forces and WBV in patients with LI and controls.
- Published
- 2024
- Full Text
- View/download PDF
46. Development of experimental microfluidic device and methodology for assessing microrheological properties of blood.
- Author
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Antonova N, Khristov K, Alexandrova A, Muravyov A, and Velcheva I
- Subjects
- Humans, Erythrocyte Deformability, Suspensions, Erythrocytes, Lab-On-A-Chip Devices, Microfluidics, Diabetes Mellitus, Type 2
- Abstract
Background and Objective: Microfluidics is a useful tool for investigating blood microrheology. The study aimed to present the development of a microfluidic device for assessing the microrheological properties of blood cells' suspensions and its application in patients with diabetes mellitus type 2 (T2DM)., Methods: A new microfluidic device was elaborated, connected to a system, including a microscope with a digital camera, a pump with a manometer and a computer with specially developed software. Blood cells' suspensions were investigated in a microchamber between two parallel optical slides within a 100μm distance. The motion of the blood cells in the microchamber was observed by the microscope and it was recorded and visualized by a digital camera. A method for evaluating the deformability of blood cells and a device for its implementation were used [1]., Results: The pressure and flow rate ranges in the microfluidic device were specified by model suspensions of beta-ferroxy-hydroxide and red blood cells (RBC) suspensions. The pressure changes, realized by a pump (micropipette), connected to a manometer were established and the corresponding shear rates in the microfluidic device were determined. Data about the blood microrheological properties like RBC aggregation and deformability, leukocyte adhesion from a group of healthy volunteers and from patients with T2DM were obtained., Conclusions: The developed device and experimental system is a promising tool for the study of blood microrheology.
- Published
- 2023
- Full Text
- View/download PDF
47. Assessment of the exposure of two pesticides on common carp (Cyprinus carpio Linnaeus, 1758): Are the prolonged biomarker responses adaptive or destructive?
- Author
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Yancheva V, Georgieva E, Velcheva I, Iliev I, Stoyanova S, Vasileva T, Bivolarski V, Todorova-Bambaldokova D, Zulkipli N, Antal L, and Nyeste K
- Subjects
- Animals, Biomarkers, Ecosystem, Gills, Carps, Chlorpyrifos toxicity, Pesticides toxicity, Water Pollutants, Chemical toxicity
- Abstract
Chlorpyrifos (CPF) and cypermethrin (CYP) are two insecticides that have a proven negative effect on non-target aquatic organisms when they enter the surface waters. However, literature on the comparative effects of these pesticides on important aquaculture fish species, such as common carp (Cyprinus carpio Linnaeus, 1758) is not yet scientifically detailed, especially over the long-term. The idea of conducting a long-term exposure is to find out how the observed biomarkers would change compared to the short-term exposure. In the natural environment, toxicants are not present alone, but in combination. By monitoring the long-term impact of individual substances, the state of aquatic ecosystems exposed to various toxicants could be predicted. Thus, this study aimed to evaluate the toxicity of different concentrations of CYP (0.0002, 0.0003, and 0.0006 μg/L) and CPF (0.03, 0.05, and 0.10 μg/L) in 50-L glass tanks on C. carpio, exposed for 30 days under laboratory conditions. A set of histological and biochemical biomarkers in the gills and liver were applied with the chemical analyses of water and fish organs. Furthermore, the condition and hepatosomatic index were calculated to assess the physiological status of the treated carps. The behavioral responses were also monitored, and the respiration rate was analyzed. The results suggest that CYP had a more prominent effect on the histological structure of fish organs, biochemical responses of anti-oxidant enzymes, behavior, and respiration rate compared to the effect of CPF. In addition, the results also indicate that the liver is more susceptible to chronic and chemically induced cellular stress compared to the gills, with overall destructive changes in the histological biomarkers rather than adaptive. Regardless of the scenario, our results provide novel insights into pesticide exposure and the possible biological impacts on economically important freshwater fish, exposed to lower CYP and CPF concentrations, based on the EU legislation (maximum allowable concentrations, MAC-EQS)., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
48. Biomarkers for pollution in caged mussels from three reservoirs in Bulgaria: A pilot study.
- Author
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Georgieva E, Antal L, Stoyanova S, Aranudova D, Velcheva I, Iliev I, Vasileva T, Bivolarski V, Mitkovska V, Chassovnikarova T, Todorova B, Uzochukwu IE, Nyeste K, and Yancheva V
- Abstract
The mussel-watch concept was firstly proposed in 1975, which was later adopted by several international monitoring programs worldwide. However, for the very first time, a field experiment with caged mussels was performed in three reservoirs in Bulgaria to follow the harmful effects of sub-chronic pollution (30 days) of metals, trace, and macro-elements, as well as some organic toxicants, such as polybrominated diphenyl ethers and chlorinated paraffins. Therefore, we studied the biometric indices, histochemical lesions in the gills, biochemical changes in the digestive glands (antioxidant defense enzymes, such as catalase, glutathione reductase, and glutathione peroxidase; metabolic enzymes, such as lactate dehydrogenase, alanine aminotransferase, and aspartate aminotransferase, and the neurotransmitter cholinesterase), in addition to the DNA damage in the Chinese pond mussel, Sinanodonta woodiana (Lea, 1834) in Kardzhali, Studen Kladenets and Zhrebchevo reservoirs in Bulgaria. Significant correlation trends between the pollution levels, which we reported before, and the biomarker responses were established in the current paper. Overall, we found that both tested organs were susceptible to pollution-induced oxidative stress. The different alterations in the selected biomarkers in the caged mussels compared to the reference group were linked to the different kinds and levels of water pollution in the reservoirs, and also to the simultaneously conducted bioaccumulation studies., Competing Interests: The authors declare no conflict of interest., (© 2022 The Author(s).)
- Published
- 2022
- Full Text
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49. Hemorheological and microvascular disturbances in patients with type 2 diabetes mellitus.
- Author
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Antonova N, Velcheva I, and Paskova V
- Subjects
- Blood Viscosity physiology, Erythrocyte Aggregation, Erythrocyte Deformability, Fibrinogen, Hematocrit, Hemorheology, Humans, Microcirculation, Diabetes Mellitus, Type 2
- Abstract
Background: In the blood vessels the impaired hemorheological parameters in patients with type 2 diabetes mellitus (T2DM) could lead to elevated flow resistance, increased forces at the endothelial wall and to microvascular disturbances., Objective: The aim of the study is to investigate the hemorheological variables and the changes of the skin blood flow responses to cold stress in T2DM patients., Methods: The basic hemorheological parameters: hematocrit (Ht), fibrinogen (Fib), whole blood viscosity (WBV) and plasma viscosity (PV) were examined in 20 patients with T2DM and a control group of 10 healthy age and sex matched controls. The mechanisms of vascular tone regulation were investigated using the wavelet analysis of the skin temperature oscillations (WAST). The degrees of the microvascular tone changes were determined during a cold test in the endothelial (0.02-0.0095 Hz), neurogenic (0.05- 0.02 Hz) and myogenic (0.05- 0.14 Hz) frequency ranges., Results: Significant increase of Fib and WBV in the patients in comparison to controls was found. The mean values of the amplitudes of the skin temperature (ST) pulsations decreased significantly during the cold stress only in the endothelial frequency range for the diabetic patients., Conclusions: The results of our study reveal parallel impairment of the blood rheological parameters and the cutaneous microcirculation in T2DM patients.
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- 2022
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50. Which Is More Toxic? Evaluation of the Short-Term Toxic Effects of Chlorpyrifos and Cypermethrin on Selected Biomarkers in Common Carp ( Cyprinus carpio , Linnaeus 1758).
- Author
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Georgieva E, Yancheva V, Stoyanova S, Velcheva I, Iliev I, Vasileva T, Bivolarski V, Petkova E, László B, Nyeste K, and Antal L
- Abstract
The general aim of this study was to investigate the negative short-term effects of different concentrations of chlorpyrifos (CPF) and cypermethrin (CYP), based on the EU legislation (MAC-EQS) in common carp ( Cyprinus carpio Linnaeus, 1758) under laboratory conditions and to compare their toxicity. The fish were exposed to the pesticides for 96 h and then different histological and biochemical biomarkers were investigated in the gills and liver, and bioaccumulation analyses were conducted. The chemical studies showed increased pesticide concentrations in the gills as the first site for pollutants compared to the liver at the 96th hour. In addition, the histological analyses showed severe alterations in the gills and liver after exposure to both tested pesticides. In the gills, we found mainly intense proliferative and, to a lesser extent, degenerative changes and alterations in the circulatory system, such as necrosis and vasodilation. In the liver, regressive and progressive lesions, as well as circulatory disturbances and inflammation, were observed. The regressive lesions showed a higher degree of expression compared to the other changes. Furthermore, we found altered enzymatic activities-catalase, glutathione reductase, and glutathione peroxidase-in the liver, compared to the control. Overall, both tested pesticides impacted the studied biomarkers in common carp, even at concentrations lower than those permitted by law. However, the results of the comparative analysis showed a relatively higher toxicity of CYP compared to CPF in the fish. Still, questions persist as to whether the observed changes are adaptive or entirely destructive. To avoid any danger or risk, these pesticides must be applied cautiously, especially near water bodies.
- Published
- 2021
- Full Text
- View/download PDF
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