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655 results on '"Parameswaran, R."'

7. Role of 18F-FDG PET/CT in Erdheim–Chester Disease in the Era of Multimodality Imaging

Author

Bhargavi Jois, Rupa Ananthasivan, Parameswaran R. V. Sudarshan Rawat, and Susmita Rakshit

Subjects
erdheim–chester disease, fdg pet/ct, multimodality imaging, Medical physics. Medical radiology. Nuclear medicine, R895-920
Abstract

Erdheim–Chester disease is a rare disease with systemic non-Langerhans cell histiocytosis, the diagnosis of which with conventional imaging modalities is challenging. We describe a case of a 73-year-old woman who was referred with a progressive history of bilateral proptosis. The magnetic resonance imaging (MRI) orbit demonstrated bilateral orbital masses with optic nerve encasement. A subsequent 18F-FDG PET/CT scan showed multi-organ disease with involvement of the orbits, pericardium, aorta, pararenal fascia, and appendicular bones. Metabolically active, easily accessible areas were selected for CT-guided biopsy. The biopsy showed sheets of foamy histiocytes with the expression of CD 68 and CD 163 consistent with a diagnosis of Erdheim–Chester disease. The FDG PET/CT played a pivotal role in establishing the diagnosis with the assessment of disease extent and further guided in the targeted biopsy.

Published
2021
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10. O-acetylated n-acetylneuraminic acid as a novel target for therapy in human pre-b acute lymphoblastic leukemia

Author

Muschen, Markus, Parameswaran, R, Lim, M, Arutyunyan, A, Abdel-Azim, H, Hurtz, C, Lau, K, Müschen, M, Yu, RK, von, M, and Heisterkamp, N

Abstract

The development of resistance to chemotherapy is a major cause of relapse in acute lymphoblastic leukemia (ALL). Though several mechanisms associated with drug resistance have been studied in detail, the role of carbohydrate modification remains unexplored

Published
2013

11. Endogenous antigen tunes the responsiveness of naive B cells but not T cells

Author

Zikherman, Julie, Weiss, Arthur, and Parameswaran, R

Abstract

In humans, up to 75% of newly generated B cells and about 30% of mature B cells show some degree of autoreactivity. Yet, how B cells establish and maintain tolerance in the face of autoantigen exposure during and after development is not certain. Studies o

Published
2012

12. Association Between Age and Outcomes Following Catheter Ablation in AF-Mediated Cardiomyopathy

Author

Segan, L., primary, Chieng, D., additional, Sugumar, H., additional, Ling, L., additional, Azzopardi, S., additional, Nderitu, Z., additional, Parameswaran, R., additional, Voskoboinik, A., additional, McLellan, A., additional, Lee, G., additional, Joseph, S., additional, Wong, M., additional, Taylor, A., additional, Kalman, J., additional, Kistler, P., additional, and Prabhu, S., additional

Published
2023
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14. Worldwide Disparities in Recovery of Cardiac Testing 1 Year Into COVID-19

Author

Einstein, A, Hirschfeld, C, Williams, M, Vitola, J, Better, N, Villines, T, Cerci, R, Shaw, L, Choi, A, Dorbala, S, Karthikeyan, G, Lu, B, Sinitsyn, V, Ansheles, A, Kudo, T, Bucciarelli-Ducci, C, Norgaard, B, Maurovich-Horvat, P, Campisi, R, Milan, E, Louw, L, Allam, A, Bhatia, M, Sewanan, L, Malkovskiy, E, Cohen, Y, Randazzo, M, Narula, J, Morozova, O, Pascual, T, Pynda, Y, Dondi, M, Paez, D, Hinterleitner, G, Lu, Y, Xu, Z, Erinne, I, Shetty, M, Lopez-Mattei, J, Parwani, P, Goda, A, Shirka, E, Bouyoucef, S, Chelghoum, L, Mansouri, F, Medjahedi, A, Naili, Q, Ridouh, M, Alasia, D, Alberghina, L, Aramayo, N, Buchara, D, Busso, F, Bustos Rivadero, J, Camilletti, J, Campanelli, H, Castro, R, Daicz, M, del Riego, H, Dragonetti, L, Echazarreta, D, Erriest, J, Faccio, F, Facello, A, Gallegos, H, Geronazzo, R, Glait, H, Hasbani, V, Jager, V, Lewkowicz, J, Lotti, J, Maciel, N, Masoli, O, Mastrovito, E, Medus, M, Merani, M, Molteni, S, Montecinos, M, Parisi, G, Sueldo, C, Perez de Arenaza, D, Quintana, L, Radzinschi, A, Redruello, M, Rodriguez, M, Rojas, H, Acuna, A, Schere, D, Traverso, S, Vazquez, G, Zeffiro, S, Sakanyan, M, Beuzeville, S, Boktor, R, Crowley, M, Downie, D, Dwivedi, G, Elison, B, Farouque, O, Jasper, K, Joshi, S, Lee, J, Lee, K, Lui, E, Mcconachie, P, Meaker, J, Nandurkar, D, Neill, J, O'Rourke, E, O'Sullivan, P, Pandos, G, Premaratne, M, Prior, D, Rutherford, N, Saunders, C, Taubman, K, Tauro, A, Taylor, A, Theuerle, J, Thomas, P, Tow, J, Upton, A, Vamadevan, S, Wayne, V, Wegner, E, Wong, D, Younger, J, Beitzke, D, Feuchtner, G, Sommer, O, Weiss, K, Maroz-Vadalazhskaya, N, Tserakhau, U, Homans, F, Van De Heyning, C, Araujo, R, Soldat-Stankovic, V, Stankovic, S, Almeida, A, Anselmi, C, Azevedo, G, Bittencourt, M, Pianta, D, Cabeda, E, Carreira, L, Coelho, I, de Amorim Fernandes, F, de Lorenzo, A, Delgado, R, Erthal, F, Fernandes, F, Fernandes, J, Ferreira de Souza, T, Foppa, M, Matos Alves, W, Gontijo, C, Gottlieb, I, Grossman, G, Albernaz Siqueira, M, Nomura, C, Koga, K, Lima, R, Lopes, R, Marcal Filho, H, Masiero, P, Mastrocola, L, Menezes de Siqueira, M, Mesquita, C, Naves, D, Penna, F, Pinto, I, Rocha, T, Rocha, J, Rodrigues, A, Salioni, L, Sanches, A, Santos, M, Da Silva, L, Schvartzman, P, Matushita, C, Senra, T, Silva, M, Soares, C, Spiro, B, Suaide Silva, C, Torres, R, Monte, G, Vilela, A, Villa, A, Voss, T, Waltrick, R, Zapparoli, M, Naseer, H, Garcheva-Tsacheva, M, Ouattara, T, Thou, S, Varoeun, S, Abikhzer, G, Beanlands, R, Chetrit, M, Dabreo, D, Dennie, C, Friedrich, M, Hafez, M, Hanneman, K, Miller, R, Oikonomou, A, Roifman, I, Small, G, Tandon, V, Trivedi, A, White, J, Zukotynski, K, Alay, R, Concha, C, Massardo, T, Abad, P, Anzola, K, Arturo, H, Benitez, L, Cadena, A, Zamudio, C, Calderon, A, Gutierrez Villamil, C, Jaimes, C, Londono, J, Lopez, N, Merlano-Gaitan, S, Murgieitio-Cabrera, R, Valencia, M, Vergel, D, Santamaria, A, Solis, F, Batinic, T, Franceschi, M, Paar, M, Prpic, M, Felipe Batista, C, Cabrera, L, Peix, A, Pena, Y, Rochela Vazquez, L, Ntalas, I, Kaminek, M, Kincl, V, Lang, O, Abdulla, J, Bottcher, M, Busk, M, Geisler, U, Gormsen, L, Hansson, N, Hess, S, Hove, J, Jensen, L, Jensen, M, Kragholm, K, Ovrehus, K, Rasmussen, J, Ronnow Sand, N, Sondergaard, H, Zaremba, T, Speckter, H, Amores, N, Velez, M, Alrahman, T, Elsamad, S, Abdelfattah, A, Elkaffas, S, Hassan, M, Hussein, E, Ibrahim, A, Kandeel, A, Ali, M, Shaaban, M, Flores, C, Gomez Leiva, V, Liiver, A, Larikka, M, Uusitalo, V, Agostini, D, Berger, C, Dietz, M, Hyafil, F, Ohana, M, Prigent, K, Regaieg, H, Sarda-Mantel, L, H-Ici, D, Ayetey, H, Angelidis, G, Fragkaki, C, Fragkiadaki, C, Georgoulias, P, Koutelou, M, Kyrozi, E, Lama, N, Prassopoulos, V, Spartalis, M, Zaglavara, T, Gonzalez, C, Gutierrez, G, Maldonado, A, Martinez, Y, Kovacs, A, Szilveszter, B, Banthia, N, Bhat, V, Choudhury, P, Chowdekar, V, Christopher, J, Garg, T, Goyal, N, Gupta, R, Gupta, A, Hephzibah, J, Jain, S, Krupa, J, Kumar, P, Kumar, S, Lalchandani, A, Mishra, A, Mishra, V, Mohan, P, Ozair, A, Pandey, S, Parameswaran, R, Patel, C, Patel, T, Patel, S, Vimala, L, Kumar Sarangi, D, Sengupta, S, Sethi, A, Sharma, A, Sharma, P, Shrigiriwar, A, Singh, S, Singh, H, Sood, A, Verma, A, Vyas, A, Soeriadi, E, Bun, E, Hutomo, F, Syawaluddin, H, Yudistiro, R, Albadr, A, Assadi, M, Emami, F, Emami-Ardekani, A, Farzanehfar, S, Jafari, R, Manafi-Farid, R, Tajik, M, Arnson, Y, Fuchs, S, Goldkorn, R, Kennedy, J, Leitman, M, Shalev, A, Acampa, W, Albano, D, Alongi, P, Arnone, G, Assante, R, Baritussio, A, Bauckneht, M, Bianco, F, Bonfiglioli, R, Bovenzi, F, Bruno, I, Bruno, A, Busnardo, E, Califaretti, E, Casoni, R, Censullo, V, Chierichetti, F, Chiocchi, M, Cittanti, C, Clemente, A, Cuocolo, A, De Rimini, M, De Vincentis, G, Della Tommasina, V, Dellegrottaglie, S, Erba, P, Evangelista, L, Faggi, L, Faragasso, E, Florimonte, L, Frantellizzi, V, Gatti, M, Gaudiano, A, Gelardi, F, Gerali, A, Gimelli, A, Guglielmo, M, Leccisotti, L, Liga, R, Liguori, C, Longo, G, Maffione, M, Marcassa, C, Matassa, G, Mele, D, Mircoli, L, Paccagnella, A, Pacella, S, Padovano, F, Pellegrini, D, Pergola, V, Pugliese, L, Quartuccio, N, Rampin, L, Ricci, F, Rubini, G, Russo, V, Sambuceti, G, Scatteia, A, Sciagra, R, Spidalieri, G, Stefanelli, A, Tedeschi, C, Ventroni, G, Baugh, D, Madu, E, Aikawa, T, Asano, H, Fujimoto, S, Fujise, K, Fukushima, Y, Fukuyama, K, Ichikawa, Y, Ideguchi, R, Iguchi, N, Imai, M, Ishimura, H, Isobe, S, Ito, K, Izawa, Y, Kadokami, T, Kasai, T, Kato, T, Kawamoto, T, Kiryu, S, Kumita, S, Manabe, O, Maruno, H, Matsumoto, N, Miyagawa, M, Moroi, M, Nagamachi, S, Nakajima, K, Nakazato, R, Nanasato, M, Naya, M, Norikane, T, Ohta, Y, Otomi, Y, Otsuka, H, Oyama-Manabe, N, Saito, M, Sarai, M, Sato, J, Sato, D, Shiraishi, S, Takanami, K, Takehana, K, Taniguchi, Y, Teragawa, H, Tomizawa, N, Umeji, K, Wakabayashi, Y, Yamada, S, Yamazaki, S, Yoneyama, T, Rawashdeh, M, Dautov, T, Makhdomi, K, Abass, M, Garashi, M, Siraj, Q, Kalnina, M, Haidar, M, Komiagiene, R, Kviecinskiene, G, Vajauskas, D, Karim, N, Doucoure, M, Reichmuth, L, Samuel, A, Dieng, M, Naojee, A, Hernandez, E, Alducin Tellez, C, Alexanderson-Rosas, E, Barragan, E, Cabada, M, Calderon, D, Carvajal-Juarez, I, Esparza, J, Gama-Moreno, M, Quinto, V, Gonzalez, N, Herrera-Zarza, M, Meave, A, Medina Verdugo, J, Melendez, G, Morales Murguia, R, Navarro Quiroz, C, Ornelas, M, Preciado-Anaya, A, Preciado-Gutierrez, O, Puente, A, Salazar, A, Rosales Uvera, S, Rosales-Uvera, S, Serna Macias, J, Sierra-Galan, L, Tirado Alderete, J, Vallejo, E, Faraggi, M, Sereegotov, E, Ben Rais, N, Alaoui, N, Kyiphyu, T, Oo, S, Win, S, Zar, H, Ghimire, R, Neupane, M, Glaudemans, A, Slart, R, Verschure, D, Allen, B, Edmond, J, Mckenzie, C, Tie, S, Van Pelt, N, Worthington, K, Young, C, Soli, I, Kana, S, Onubogu, U, Sani, M, Braten, A, Jorgensen, A, Vassbotn, H, Al Dhuhli, H, Jawa, Z, Tag, N, Fatima, S, Imran, M, Younis, M, Saadullah, M, Malo, Y, Lenturut-Katal, D, Castillo, M, Ortellado, J, Akhter, A, Cader, F, Hussain, R, Khan, S, Mandal, T, Nasreen, F, An, Y, Cao, D, Gong, L, Hou, Y, Jia, C, Li, T, Li, C, Liu, H, Liu, W, Liu, J, Ng, M, Shi, H, Tang, C, Wang, X, Wang, Z, Wang, Y, Wu, J, Yi, Y, Yuan, L, Zhang, T, Zhang, L, Chavez, E, Cruz, C, Llontop, C, Morales, R, Abrihan, P, Bustos-Barroso, A, Duldulao-Ogbac, M, Eduarte, C, Obaldo, J, Quinon, A, San Juan, B, San Juan, C, Sauler-Gomez, M, Uy, M, Kostkiewicz, M, Kunikowska, J, Teresinska, A, Urbanik, T, Bettencourt, N, Fontes-Carvalho, R, Gavina, C, Goncalves, L, Macedo, F, Moreno, N, Sousa, C, Timoteo, A, Vidigal, M, Al Heidous, M, Ramanathan, S, Arnous, S, Aytani, S, Byrne, A, Gleeson, T, Kerins, D, O'Brien, J, Bang, J, Bom, H, Cheon, M, Cheon, G, Cho, S, Hong, C, Jeong, Y, Kang, W, Kang, Y, Kim, J, Oh, S, So, Y, Song, H, Won, K, Yoo, S, Mitevska, I, Vavlukis, M, Salobir, B, Stalc, M, Benedek, T, Pop, M, Stan, C, Dariy, O, Gagarina, N, Itskovich, I, Karalkin, A, Kokov, A, Marina, G, Migunova, E, Pospelov, V, Ryzhkova, D, Sayfullina, G, Sergienko, V, Shurupova, I, Vakhromeeva, M, Valiullina, N, Zavadovsky, K, Zhuravlev, K, Abazid, R, Al Garni, T, Alasnag, M, Aljizeeri, A, Amer, H, Amro, A, Hamdy, H, Smettei, O, Saranovic, D, Vlajkovic, M, Keng, F, See, J, Berecova, Z, Mistinova, J, Evbuomwan, O, Govender, N, Hack, J, Hadebe, B, Hlongwa, K, Kaplan, M, Lakhi, H, Milos, K, Modiselle, M, More, S, Muambadzi, N, Scholtz, L, Barreiro-Perez, M, Blanco, I, Broncano, J, Camarero, A, Casans-Tormo, I, De Haro, J, Flotats, A, Garcia, E, Mendiguchia, C, Jimenez-Heffernan, A, Leta, R, Diaz, J, Vega, L, Manovel-Sanchez, A, Monzonis, A, Patrut, B, Pubul, V, Perez, R, Zeidan, N, Nanayakkara, D, Suliman, A, Engblom, H, Murtadha, M, Ostenfeld, E, Simonsson, M, Alkadhi, H, Buechel, R, Burger, P, Grani, C, Kamani, C, Kawel-Bohm, N, Klaeser, B, Manka, R, Prior, J, Kaewchur, T, Khiewvan, B, Kositwattanarerk, A, Namwongprom, S, Thientunyakit, T, Sayman, H, Yuksel, M, Sebikali, M, Okello, E, Korol, P, Noverko, I, Satyr, M, Ahmad, T, Alfakih, K, Andrade, I, Buckingham, S, Bularga, A, Carpenter, J, Cole, G, Cusack, D, David, S, Davis, P, Fairbairn, T, Ghosh, A, Ramkumar, P, Hamilton, M, Haque, F, Hudson, B, Johnstone, A, Karthikeyan, V, Kay, M, Khan, M, Kitt, J, Low, C, Mcalindon, E, Mccreavy, D, Morrissey, B, Motwani, M, Na, D, Nicol, E, Patel, D, Rodrigues, J, Rofe, C, Schofield, R, Semple, T, Sheikh, A, Sinha, A, Subedi, D, Topping, W, Tweed, K, Underwood, S, Weir-Mccall, J, Zuhairy, H, Abbasi, T, Abohashem, S, Abramson, S, Al-Mallah, M, Kumar, M, Balmer-Swain, M, Berman, D, Bernheim, A, Bhatti, S, Biederman, R, Bieging, E, Bingham, S, Bloom, S, Blue, S, Borges, A, Branch, K, Bravo, P, Buddhe, S, Budoff, M, Bullock-Palmer, R, Cahill, M, Candela, C, Cao, J, Chatterjee, S, Chatzizisis, Y, Chaudhuri, N, Cheezum, M, Chelliah, A, Chen, T, Chen, M, Chen, L, Chokshi, A, Chung, J, Danciu, S, Desisto, W, Dilorenzo, M, Doukky, R, Duvall, W, Ferencik, M, Foster, C, Fuisz, A, Gannon, M, German, D, Gerson, M, Geske, J, Hage, F, Haider, A, Haider, S, Hamirani, Y, Hassen, K, Hendel, R, Henkel, J, Horgan, S, Hyun, M, Janardhanan, R, Jerome, S, Kalra, D, Kassop, D, Kinkhabwala, M, Kinzfogl, G, Koch, B, Koweek, L, Krepp, J, Kwon, Y, Layer, J, Lesser, J, Leung, S, Lisske, B, Magurany, K, Markowitz, J, Mccullough, B, Moalemi, A, Moffitt, C, Montanez, J, Moore, W, Morayati, S, Mossa-Basha, M, Mrsic, Z, Murthy, V, Nagpal, P, Nelson, K, Nijjar, P, O'Quinn, R, Passen, E, Patil, P, Pursnani, A, Quachang, N, Rabbat, M, Ranjan, P, Lozano, P, Schemmer, M, Seifried, R, Shah, N, Shah, A, Shanbhag, S, Sharma, G, Skotnicki, R, Sobczak, M, Soman, P, Sorrell, V, Srichai, M, Streeter, J, Strickland, L, Suliman, S, Tebyanian, N, Thomas, D, Thompson, R, Uretsky, S, Vallurupalli, S, Vandyck-Acquah, M, Verma, V, Weinstein, J, Wolinsky, D, Zareba, K, Zgaljardic, M, Beretta, M, Ferrando, R, Kapitan, M, Mut, F, Djuraev, O, Rozikhodjaeva, G, Vera, L, Duc, B, Nguyen, X, Hiep Nguyen, P, Einstein A. J., Hirschfeld C., Williams M. C., Vitola J. V., Better N., Villines T. C., Cerci R., Shaw L. J., Choi A. D., Dorbala S., Karthikeyan G., Lu B., Sinitsyn V., Ansheles A. A., Kudo T., Bucciarelli-Ducci C., Norgaard B. L., Maurovich-Horvat P., Campisi R., Milan E., Louw L., Allam A. H., Bhatia M., Sewanan L., Malkovskiy E., Cohen Y., Randazzo M., Narula J., Morozova O., Pascual T. N. B., Pynda Y., Dondi M., Paez D., Hinterleitner G., Lu Y., Xu Z., Hirschfeld C. B., Erinne I., Shetty M., Choi A., Lopez-Mattei J., Parwani P., Goda A., Shirka E., Bouyoucef S., Chelghoum L., Mansouri F., Medjahedi A., Naili Q., Ridouh M., Alasia D., Alberghina L., Aramayo N., Buchara D., Busso F. G., Bustos Rivadero J. J., Camilletti J., Campanelli H., Castro R. B., Daicz M., del Riego H., Dragonetti L., Echazarreta D., Erriest J., Faccio F., Facello A., Gallegos H., Geronazzo R., Glait H., Hasbani V., Jager V., Lewkowicz J. M., Lotti J., Maciel N., Masoli O., Mastrovito E., Medus M., Merani M. F., Molteni S., Montecinos M., Parisi G., Sueldo C. P., Perez de Arenaza D., Quintana L., Radzinschi A., Redruello M., Rodriguez M., Rojas H., Acuna A. R., Schere D., Traverso S., Vazquez G., Zeffiro S., Sakanyan M., Beuzeville S., Boktor R., Crowley M., Downie D. A., Dwivedi G., Elison B., Farouque O., Jasper K., Joshi S., Lee J., Lee K., Lui E., Mcconachie P., Meaker J., Nandurkar D., Neill J., O'Rourke E., O'Sullivan P., Pandos G., Premaratne M., Prior D., Rutherford N., Saunders C., Taubman K., Tauro A., Taylor A., Theuerle J., Thomas P., Tow J., Upton A., Vamadevan S., Wayne V., Wegner E. A., Wong D., Younger J., Beitzke D., Feuchtner G., Sommer O., Weiss K., Maroz-Vadalazhskaya N., Tserakhau U., Homans F., Van De Heyning C. M., Araujo R., Soldat-Stankovic V., Stankovic S., Almeida A., Anselmi C., Azevedo G. S. A., Bittencourt M. S., Pianta D. B., Cabeda E., Carreira L., Coelho I., de Amorim Fernandes F., de Lorenzo A., Delgado R., Erthal F., Fernandes F., Fernandes J., Ferreira de Souza T., Foppa M., Matos Alves W. F., Gontijo C., Gottlieb I., Grossman G., Albernaz Siqueira M. H., Nomura C. H., Koga K. H., Lima R., Lopes R., Marcal Filho H. H., Masiero P., Mastrocola L., Menezes de Siqueira M. E., Mesquita C., Naves D., Penna F., Pinto I., Rocha T., Rocha J. L., Rodrigues A., Salioni L., Sanches A., Santos M., Da Silva L. S., Schvartzman P., Matushita C. S., Senra T., Silva M., Soares C. E., Spiro B., Suaide Silva C. E., Torres R., Monte G. U., Vilela A., Villa A. V., Vitola J., Voss T., Waltrick R., Zapparoli M., Naseer H., Garcheva-Tsacheva M., Ouattara T. F., Thou S., Varoeun S., Abikhzer G., Beanlands R., Chetrit M., Dabreo D., Dennie C., Friedrich M., Hafez M. N., Hanneman K., Miller R., Oikonomou A., Roifman I., Small G., Tandon V., Trivedi A., White J., Zukotynski K., Alay R., Concha C., Massardo T., Abad P., Anzola K., Arturo H., Benitez L., Cadena A., Zamudio C. C., Calderon A., Gutierrez Villamil C. T., Jaimes C., Londono J. L., Lopez N., Merlano-Gaitan S., Murgieitio-Cabrera R., Valencia M., Vergel D., Santamaria A. Z., Solis F., Batinic T., Franceschi M., Paar M. H., Prpic M., Felipe Batista C. J., Cabrera L. O., Peix A., Pena Y., Rochela Vazquez L. M., Ntalas I., Kaminek M., Kincl V., Lang O., Abdulla J., Bottcher M., Busk M., Geisler U., Gormsen L. C., Hansson N., Hess S., Hove J., Jensen L. T., Jensen M. T., Kragholm K. H., Ovrehus K., Rasmussen J., Ronnow Sand N. P., Sondergaard H., Zaremba T., Speckter H., Amores N., Velez M. S., Alrahman T. A., Elsamad S. A., Abdelfattah A., Allam A., Elkaffas S., Hassan M., Hussein E., Ibrahim A., Kandeel A., Ali M. M., Shaaban M., Flores C., Gomez Leiva V. V., Liiver A., Larikka M., Uusitalo V., Agostini D., Berger C., Dietz M., Hyafil F., Ohana M., Prigent K., Regaieg H., Sarda-Mantel L., H-Ici D. O., Ayetey H., Angelidis G., Fragkaki C., Fragkiadaki C., Georgoulias P., Koutelou M., Kyrozi E., Lama N., Prassopoulos V., Spartalis M., Zaglavara T., Gonzalez C., Gutierrez G., Maldonado A., Martinez Y., Kovacs A., Szilveszter B., Banthia N., Bhat V., Choudhury P., Chowdekar V. S., Christopher J., Garg T., Goyal N. K., Gupta R. K., Gupta A., Hephzibah J., Jain S., Krupa J., Kumar P., Kumar S., Lalchandani A., Mishra A., Mishra V. D., Mohan P., Ozair A., Pandey S., Parameswaran R., Patel C., Patel T., Patel S., Vimala L. R., Kumar Sarangi D. P., Sengupta S., Sethi A., Sharma A., Sharma A. K., Sharma P., Shrigiriwar A., Singh S., Singh H., Sood A., Verma A., Vyas A., Soeriadi E. A., Bun E., Hutomo F., Syawaluddin H., Yudistiro R., Albadr A., Assadi M., Emami F., Emami-Ardekani A., Farzanehfar S., Jafari R., Manafi-Farid R., Tajik M., Arnson Y., Fuchs S., Goldkorn R., Kennedy J., Leitman M., Shalev A., Acampa W., Albano D., Alongi P., Arnone G., Assante R., Baritussio A., Bauckneht M., Bianco F., Bonfiglioli R., Bovenzi F., Bruno I., Bruno A., Busnardo E., Califaretti E., Casoni R., Censullo V., Chierichetti F., Chiocchi M., Cittanti C., Clemente A., Cuocolo A., De Rimini M. L., De Vincentis G., Della Tommasina V., Dellegrottaglie S., Erba P. 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A., Bun E., Hutomo F., Syawaluddin H., Yudistiro R., Albadr A., Assadi M., Emami F., Emami-Ardekani A., Farzanehfar S., Jafari R., Manafi-Farid R., Tajik M., Arnson Y., Fuchs S., Goldkorn R., Kennedy J., Leitman M., Shalev A., Acampa W., Albano D., Alongi P., Arnone G., Assante R., Baritussio A., Bauckneht M., Bianco F., Bonfiglioli R., Bovenzi F., Bruno I., Bruno A., Busnardo E., Califaretti E., Casoni R., Censullo V., Chierichetti F., Chiocchi M., Cittanti C., Clemente A., Cuocolo A., De Rimini M. L., De Vincentis G., Della Tommasina V., Dellegrottaglie S., Erba P. A., Evangelista L., Faggi L., Faragasso E., Florimonte L., Frantellizzi V., Gatti M., Gaudiano A., Gelardi F., Gerali A., Gimelli A., Guglielmo M., Leccisotti L., Liga R., Liguori C., Longo G., Maffione M., Marcassa C., Matassa G., Mele D., Mircoli L., Paccagnella A., Pacella S., Padovano F., Pellegrini D., Pergola V., Pugliese L., Quartuccio N., Rampin L., Ricci F., Rubini G., Russo V., Sambuceti G., Scatteia A., Sciagra R., Spidalieri G., Stefanelli A., Tedeschi C., Ventroni G., Baugh D., Madu E., Aikawa T., Asano H., Fujimoto S., Fujise K., Fukushima Y., Fukuyama K., Ichikawa Y., Ideguchi R., Iguchi N., Imai M., Ishimura H., Isobe S., Ito K., Izawa Y., Kadokami T., Kasai T., Kato T., Kawamoto T., Kiryu S., Kumita S., Manabe O., Maruno H., Matsumoto N., Miyagawa M., Moroi M., Nagamachi S., Nakajima K., Nakazato R., Nanasato M., Naya M., Norikane T., Ohta Y., Otomi Y., Otsuka H., Oyama-Manabe N., Saito M., Sarai M., Sato J., Sato D., Shiraishi S., Takanami K., Takehana K., Taniguchi Y., Teragawa H., Tomizawa N., Umeji K., Wakabayashi Y., Yamada S., Yamazaki S., Yoneyama T., Rawashdeh M., Dautov T., Makhdomi K., Abass M., Garashi M., Siraj Q., Kalnina M., Haidar M., Komiagiene R., Kviecinskiene G., Vajauskas D., Karim N. K. A., Doucoure M., Reichmuth L., Samuel A., Dieng M. L., Naojee A. S., Hernandez E. A., Alducin Tellez C. R., Alexanderson-Rosas E., Barragan E., Cabada M., Calderon D., Carvajal-Juarez I., Esparza J., Gama-Moreno M. G., Quinto V. G., Gonzalez N. C., Herrera-Zarza M. C., Meave A., Medina Verdugo J. G., Melendez G., Morales Murguia R. H., Navarro Quiroz C. S., Ornelas M., Preciado-Anaya A., Preciado-Gutierrez O. U., Puente A., Salazar A. R., Rosales Uvera S. G., Rosales-Uvera S., Serna Macias J. A., Sierra-Galan L., Sierra-Galan L. M., Tirado Alderete J. C., Vallejo E., Faraggi M., Sereegotov E., Ben Rais N., Alaoui N. I., Kyiphyu T., Oo S. T., Win S. M., Zar H., Ghimire R., Neupane M., Glaudemans A., Slart R., Verschure D., Allen B., Edmond J., Mckenzie C., Tie S., Van Pelt N., Worthington K., Young C., Soli I. A., Kana S., Onubogu U., Sani M., Braten A. T., Jorgensen A., Vassbotn H. -E., Al Dhuhli H., Jawa Z., Tag N., Fatima S., Imran M. B., Younis M. N., Saadullah M., Malo Y. H., Lenturut-Katal D., Castillo M., Ortellado J., Akhter A., Cader F. A., Hussain R., Khan S. R., Mandal T., Nasreen F., An Y., Cao D., Gong L., Hou Y., Jia C., Li T., Li C., Liu H., Liu W., Liu J., Ng M. -Y., Shi H., Tang C., Wang X., Wang Z., Wang Y., Wu J., Yi Y., Yuan L., Zhang T., Zhang L., Chavez E., Cruz C., Llontop C., Morales R., Abrihan P., Bustos-Barroso A., Duldulao-Ogbac M., Eduarte C., Obaldo J., Quinon A., San Juan B., San Juan C. J., Sauler-Gomez M. R., Uy M., Kostkiewicz M., Kunikowska J., Teresinska A., Urbanik T., Bettencourt N., Fontes-Carvalho R., Gavina C., Goncalves L., Macedo F., Moreno N., Sousa C., Timoteo A. T., Vidigal M. J., Al Heidous M., Ramanathan S., Arnous S., Aytani S., Byrne A., Gleeson T., Kerins D., O'Brien J., Bang J. -I., Bom H., Cheon M., Cheon G. J., Cho S. -G., Hong C. M., Jeong Y. H., Kang W. J., Kang Y. -K., Kim J. -Y., Oh S. W., So Y., Song H. -C., Won K. S., Yoo S. W., Mitevska I., Vavlukis M., Salobir B. G., Stalc M., Benedek T., Pop M., Stan C., Ansheles A., Dariy O., Gagarina N., Itskovich I., Karalkin A., Kokov A., Marina G., Migunova E., Pospelov V., Ryzhkova D., Sayfullina G., Sergienko V., Shurupova I., Vakhromeeva M., Valiullina N., Zavadovsky K., Zhuravlev K., Abazid R., Al Garni T., Alasnag M., Aljizeeri A., Amer H., Amro A., Hamdy H., Smettei O., Saranovic D. S., Vlajkovic M., Keng F., See J., Berecova Z., Mistinova J. P., Evbuomwan O., Govender N., Hack J., Hadebe B., Hlongwa K., Kaplan M., Lakhi H., Milos K., Modiselle M., More S., Muambadzi N., Scholtz L., Barreiro-Perez M., Blanco I., Broncano J., Camarero A., Casans-Tormo I., De Haro J., Flotats A., Garcia E., Mendiguchia C. G., Jimenez-Heffernan A., Leta R., Diaz J. L., Vega L. L., Manovel-Sanchez A., Monzonis A. M., Patrut B., Pubul V., Perez R. R., Zeidan N., Nanayakkara D., Suliman A., Engblom H., Murtadha M., Ostenfeld E., Simonsson M., Alkadhi H., Buechel R. R., Burger P., Grani C., Kamani C., Kawel-Bohm N., Klaeser B., Manka R., Prior J., Kaewchur T., Khiewvan B., Kositwattanarerk A., Namwongprom S., Thientunyakit T., Sayman H. B., Yuksel M., Sebikali M. J., Okello E., Korol P., Noverko I., Satyr M., Ahmad T., Alfakih K., Andrade I., Buckingham S., Bularga A., Carpenter J. -P., Cole G., Cusack D., David S., Davis P., Fairbairn T., Ghosh A., Ramkumar P. G., Hamilton M., Haque F., Hudson B., Johnstone A., Karthikeyan V. J., Kay M., Khan M. A., Kitt J., Low C. S., Mcalindon E., Mccreavy D., Morrissey B., Motwani M., Na D., Nicol E., Patel D., Rodrigues J., Rofe C., Schofield R., Semple T., Sheikh A., Sinha A., Subedi D., Topping W., Tweed K., Underwood S. R., Weir-Mccall J., Zuhairy H., Abbasi T., Abohashem S., Abramson S., Al-Mallah M., Kumar M. A., Balmer-Swain M., Berman D., Bernheim A., Bhatti S., Biederman R., Bieging E., Bingham S., Bloom S., Blue S., Borges A., Branch K., Bravo P., Buddhe S., Budoff M., Bullock-Palmer R., Cahill M., Candela C., Cao J., Chatterjee S., Chatzizisis Y., Chaudhuri N. R., Cheezum M., Chelliah A., Chen T., Chen M., Chen L., Chokshi A., Chung J., Danciu S., DeSisto W., Dilorenzo M., Doukky R., Duvall W., Ferencik M., Foster C., Fuisz A., Gannon M., German D., Gerson M., Geske J., Hage F., Haider A., Haider S., Hamirani Y., Hassen K., Hendel R., Henkel J., Horgan S., Hyun M., Janardhanan R., Jerome S., Kalra D., Kassop D., Kinkhabwala M., Kinzfogl G., Koch B., Koweek L., Krepp J., Kwon Y., Layer J., Lesser J., Leung S., Lisske B., Magurany K., Markowitz J., Mccullough B., Moalemi A., Moffitt C., Montanez J., Moore W., Morayati S., Mossa-Basha M., Mrsic Z., Murthy V., Nagpal P., Nelson K., Nijjar P., O'Quinn R., Passen E., Patil P., Pursnani A., Quachang N., Rabbat M., Ranjan P., Lozano P. R., Schemmer M., Seifried R., Shah N., Shah A., Shanbhag S., Sharma G., Skotnicki R., Sobczak M., Soman P., Sorrell V., Srichai M., Streeter J., Strickland L., Suliman S., Tebyanian N., Thomas D., Thompson R., Uretsky S., Vallurupalli S., Vandyck-Acquah M., Verma V., Villines T., Weinstein J., Wolinsky D., Zareba K., Zgaljardic M., Beretta M., Ferrando R., Kapitan M., Mut F., Djuraev O., Rozikhodjaeva G., Vera L., Duc B. D., Nguyen X. C., and Hiep Nguyen P. M.

Abstract

Background: The extent to which health care systems have adapted to the COVID-19 pandemic to provide necessary cardiac diagnostic services is unknown. Objectives: The aim of this study was to determine the impact of the pandemic on cardiac testing practices, volumes and types of diagnostic services, and perceived psychological stress to health care providers worldwide. Methods: The International Atomic Energy Agency conducted a worldwide survey assessing alterations from baseline in cardiovascular diagnostic care at the pandemic's onset and 1 year later. Multivariable regression was used to determine factors associated with procedure volume recovery. Results: Surveys were submitted from 669 centers in 107 countries. Worldwide reduction in cardiac procedure volumes of 64% from March 2019 to April 2020 recovered by April 2021 in high- and upper middle-income countries (recovery rates of 108% and 99%) but remained depressed in lower middle- and low-income countries (46% and 30% recovery). Although stress testing was used 12% less frequently in 2021 than in 2019, coronary computed tomographic angiography was used 14% more, a trend also seen for other advanced cardiac imaging modalities (positron emission tomography and magnetic resonance; 22%-25% increases). Pandemic-related psychological stress was estimated to have affected nearly 40% of staff, impacting patient care at 78% of sites. In multivariable regression, only lower-income status and physicians’ psychological stress were significant in predicting recovery of cardiac testing. Conclusions: Cardiac diagnostic testing has yet to recover to prepandemic levels in lower-income countries. Worldwide, the decrease in standard stress testing is offset by greater use of advanced cardiac imaging modalities. Pandemic-related psychological stress among providers is widespread and associated with poor recovery of cardiac testing.

Published
2022

18. Role of 18F-FDG PET/CT in Erdheim–Chester Disease in the Era of Multimodality Imaging

Author

Susmita H. Rakshit, Rupa Ananthasivan, Parameswaran R. V. Sudarshan Rawat, and Bhargavi Jois

Subjects
medicine.medical_specialty, medicine.diagnostic_test, business.industry, Erdheim–Chester disease, R895-920, Case Report, Magnetic resonance imaging, medicine.disease, FDG PET/CT, multimodality imaging, Medical physics. Medical radiology. Nuclear medicine, Histiocytosis, medicine.anatomical_structure, Biopsy, Optic nerve, Medicine, Pericardium, Radiology, Nuclear Medicine and imaging, Radiology, business, Rare disease, Orbit (anatomy)
Abstract

Erdheim–Chester disease is a rare disease with systemic non-Langerhans cell histiocytosis, the diagnosis of which with conventional imaging modalities is challenging. We describe a case of a 73-year-old woman who was referred with a progressive history of bilateral proptosis. The magnetic resonance imaging (MRI) orbit demonstrated bilateral orbital masses with optic nerve encasement. A subsequent 18F-FDG PET/CT scan showed multi-organ disease with involvement of the orbits, pericardium, aorta, pararenal fascia, and appendicular bones. Metabolically active, easily accessible areas were selected for CT-guided biopsy. The biopsy showed sheets of foamy histiocytes with the expression of CD 68 and CD 163 consistent with a diagnosis of Erdheim–Chester disease. The FDG PET/CT played a pivotal role in establishing the diagnosis with the assessment of disease extent and further guided in the targeted biopsy.

Published
2021

21. Catheter ablation for persistent atrial fibrillation: A multicenter randomized trial of pulmonary vein isolation (PVI) versus PVI with posterior left atrial wall isolation (PWI) - The CAPLA study.

Author

Chieng D., Sugumar H., Ling L.-H., Segan L., Azzopardi S., Prabhu S., Al-Kaisey A., Voskoboinik A., Parameswaran R., Morton J.B., Pathik B., McLellan A.J., Lee G., Wong M., Finch S., Pathak R.K., Raja D.C., Sanders P., Sterns L., Ginks M., Reid C.M., Kalman J.M., Kistler P.M., Chieng D., Sugumar H., Ling L.-H., Segan L., Azzopardi S., Prabhu S., Al-Kaisey A., Voskoboinik A., Parameswaran R., Morton J.B., Pathik B., McLellan A.J., Lee G., Wong M., Finch S., Pathak R.K., Raja D.C., Sanders P., Sterns L., Ginks M., Reid C.M., Kalman J.M., and Kistler P.M.

Abstract

Background: The success of pulmonary vein isolation (PVI) is reduced in persistent AF (PsAF) compared to paroxysmal AF. Adjunctive ablation strategies have failed to show consistent incremental benefit over PVI alone in randomized studies. The left atrial posterior wall is a potential source of non-PV triggers and atrial substrate which may promote the initiation and maintenance of PsAF. Adding posterior wall isolation (PWI) to PVI had shown conflicting outcomes, with earlier studies confounded by methodological limitations. Objective(s): To determine whether combining PWI with PVI significantly improves freedom from AF recurrence, compared to PVI alone, in patients with PsAF. Method(s): This is a multi-center, prospective, international randomized clinical trial. 338 patients with symptomatic PsAF refractory to anti-arrhythmic therapy (AAD) will be randomized to either PVI alone or PVI with PWI in a 1:1 ratio. PVI involves wide antral circumferential pulmonary vein (PV) isolation, utilizing contact force sensing ablation catheters. PWI involves the creation of a floor line connecting the inferior aspect of the PVs, and a roof line connecting the superior aspect of the PVs. Follow up is for a minimum of 12 months with rhythm monitoring via implantable cardiac device and/or loop monitor, or frequent intermittent monitoring with an ECG device. The primary outcome is freedom from any documented atrial arrhythmia of > 30 seconds off AAD at 12 months, after a single ablation procedure. Conclusion(s): This randomized study aims to determine the success and safety of adjunctive PWI to PVI in patients with persistent AF.Copyright © 2021 Elsevier Inc.

Published
2022

22. P-Wave Morphology in Focal Atrial Tachycardia: An Updated Algorithm to Predict Site of Origin.

Author

Kistler P.M., Chieng D., Tonchev I.R., Sugumar H., Voskoboinik A., Schwartz L.A., McLellan A.J., Prabhu S., Ling L.-H., Al-Kaisey A., Parameswaran R., Anderson R.D., Lee G., Kalman J.M., Kistler P.M., Chieng D., Tonchev I.R., Sugumar H., Voskoboinik A., Schwartz L.A., McLellan A.J., Prabhu S., Ling L.-H., Al-Kaisey A., Parameswaran R., Anderson R.D., Lee G., and Kalman J.M.

Abstract

Objectives: This study sought to report P-wave morphology (PWM) from a series of paraseptal (PS) atrial tachycardia (AT), revise then prospectively evaluate a simplified PWM algorithm against a contemporary consecutive cohort with focal AT. Background(s): The 2006 PWM algorithm was useful in predicting the origin of focal AT. An updated algorithm was developed given advances in multipolar 3-dimensional mapping, potential limitations of PWM in separating PS sites, and a renewed interest in the P-wave in mapping non-pulmonary vein triggers. Method(s): The PWM from a consecutive series of 67 patients with PS AT were analyzed. PS sites included were coronary sinus ostium, perinodal, left and right septum, septal tricuspid annulus, superior mitral annulus, and noncoronary cusp. Next the P-wave algorithm was revised and prospectively evaluated by 3 blinded assessors. Result(s): The P-wave for PS sites was neg/pos (n = 50), iso/pos (n = 10), or isoelectric (n = 4) in lead V1 (96%). The P-wave algorithm was modified and prospectively applied to 30 consecutive patients with focal AT who underwent successful ablation. Foci (n = 30) originated from the right atrium (33.3%), left atrium (30%), and PS (36.7%). Using the PW algorithm, the correct anatomic location was identified in 93%. Incorrect interpretation of the terminal positive P-wave component (n = 3) and initial negative P-wave deflection (n = 1) in lead V1 misidentified 4 paraseptal cases. Conclusion(s): The revised PWM algorithm offers a simplified and accurate method of localizing the responsible site for focal AT. The P-wave remains an important first step in mapping atrial arrhythmias.Copyright © 2021 American College of Cardiology Foundation

Published
2022

26. Randomised Evaluation of the Impact of Catheter Ablation on Cognitive Function in Atrial Fibrillation

Author

Al-Kaisey, A., primary, Parameswaran, R., additional, Anderson, R., additional, Chieng, D., additional, Hawson, J., additional, Voskoboinik, A., additional, Sugumar, H., additional, Wong, G., additional, West, D., additional, Azzopardi, S., additional, Joseph, S., additional, McLellan, A., additional, Ling, L., additional, Bryant, C., additional, Finch, S., additional, Sanders, P., additional, Lee, G., additional, Kistler, P., additional, and Kalman, J., additional

Published
2022
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34. Catheter Ablation Versus Medication in Atrial Fibrillation and Systolic Dysfunction: Late Outcomes of CAMERA-MRI Study.

Author

Taylor A.J., Kalman J.M., Kistler P.M., Sugumar H., Prabhu S., Costello B., Chieng D., Azzopardi S., Voskoboinik A., Parameswaran R., Wong G.R., Anderson R., Al-Kaisey A.M., Ling L.-H., Kotschet E., Taylor A.J., Kalman J.M., Kistler P.M., Sugumar H., Prabhu S., Costello B., Chieng D., Azzopardi S., Voskoboinik A., Parameswaran R., Wong G.R., Anderson R., Al-Kaisey A.M., Ling L.-H., and Kotschet E.

Abstract

Objectives: This study sought to determine the long-term outcomes of restoring sinus rhythm with catheter ablation (CA). Background(s): The CAMERA-MRI (Catheter Ablation Versus Medical Rate Control in Atrial Fibrillation and Heart Failure-An MRI-Guided Multicenter Randomized Controlled Trial) study demonstrated that restoration of sinus rhythm with CA significantly improved left ventricular ejection fraction (LVEF) compared with medical rate control (MRC) at 6 months in persistent atrial fibrillation and otherwise unexplained systolic heart failure. However, the long-term outcomes have not been reported. Method(s): Patients enrolled in the CAMERA-MRI study were followed for 4 years with echocardiogram and cardiac magnetic resonance. CA involved pulmonary vein isolation and posterior left atrial wall isolation in 94%. Patients crossed over to CA after 6-month study duration. Arrhythmia burden was determined with implanted cardiac monitors or cardiac devices. Result(s): Sixty-six patients (age 62 +/- 10 years, atrial fibrillation duration of 22 +/- 16 months, and LVEF 33 +/- 9%) were randomized 1:1 to CA versus MRC. Eighteen of 33 patients crossed over from MRC group to CA group. At 4.0 +/- 0.9 years, atrial fibrillation recurred in 27 patients (57%) in the CA group with a mean burden of 10.6 +/- 21.2% after 1.4 +/- 0.6 procedures. There was an absolute increase in LVEF with CA of 16.4 +/- 13.3% compared with 8.6 +/- 7.6% in MRC (p = 0.001). In the CA group, the absence of ventricular late gadolinium enhancement was associated with a greater improvement in absolute LVEF (19 +/- 13% vs. 10 +/- 11% in the late gadolinium enhancement-positive group; p = 0.04) and LVEF normalization in 19 patients (58%) versus 4 patients (18%) in the late gadolinium enhancement-positive group (p = 0.008) at 4.0 +/- 0.9 years follow-up. Conclusion(s): CA is superior to MRC in improving LVEF in the long term in patients with atrial fibrillation and systolic heart failure. The greatest recov

Published
2021

35. Catheter Ablation for Persistent Atrial Fibrillation: a Multicentre Randomised Trial of Pulmonary Vein Isolation (PVI) versus PVI with Posterior Left Atrial Wall Isolation (PWI) - the CAPLA Study: CAPLA: randomised trial for persistent AF.

Author

Chieng D., Sugumar H., Ling L.-H., Segan L., Azzopardi S., Prabhu S., Al-Kaisey A., Voskoboinik A., Parameswaran R., Morton J.B., Pathik B., McLellan A.J., Lee G., Wong M., Finch S., Pathak R.K., Raja D.C., Sanders P., Sterns L., Ginks M., Reid C.M., Kalman J.M., Kistler P.M., Chieng D., Sugumar H., Ling L.-H., Segan L., Azzopardi S., Prabhu S., Al-Kaisey A., Voskoboinik A., Parameswaran R., Morton J.B., Pathik B., McLellan A.J., Lee G., Wong M., Finch S., Pathak R.K., Raja D.C., Sanders P., Sterns L., Ginks M., Reid C.M., Kalman J.M., and Kistler P.M.

Abstract

BACKGROUND: The success of pulmonary vein isolation (PVI) is reduced in persistent AF (PsAF) compared to paroxysmal AF. Adjunctive ablation strategies have failed to show consistent incremental benefit over PVI alone in randomised studies. The left atrial posterior wall is a potential source of non-PV triggers and atrial substrate which may promote the initiation and maintenance of PsAF. Adding posterior wall isolation (PWI) to PVI had shown conflicting outcomes, with earlier studies confounded by methodological limitations. OBJECTIVE(S): To determine whether combining PWI with PVI significantly improves freedom from AF recurrence, compared to PVI alone, in patients with PsAF. METHOD(S): This is a multi-centre, prospective, international randomised clinical trial. 338 patients with symptomatic PsAF refractory to anti-arrhythmic therapy (AAD) will be randomised to either PVI alone or PVI with PWI in a 1:1 ratio. PVI involves wide antral circumferential pulmonary vein (PV) isolation, utilising contact force sensing ablation catheters. PWI involves the creation of a floor line connecting the inferior aspect of the PVs, and a roof line connecting the superior aspect of the PVs. Follow up is for a minimum of 12 months with rhythm monitoring via implantable cardiac device/ loop monitor, or frequent intermittent monitoring with an ECG device. The primary outcome is freedom from any documented atrial arrhythmia of > 30 seconds off AAD at 12 months, after a single ablation procedure. CONCLUSION(S): This randomised study aims to determine the success and safety of adjunctive PWI to PVI in patients with persistent AF.Copyright © 2021 Elsevier Ltd. All rights reserved.

Published
2021

36. P-Wave Morphology in Focal Atrial Tachycardia: An Updated Algorithm to Predict Site of Origin.

Author

Kistler P.M., Chieng D., Tonchev I.R., Sugumar H., Voskoboinik A., Schwartz L.A., McLellan A.J., Prabhu S., Ling L.-H., Al-Kaisey A., Parameswaran R., Anderson R.D., Lee G., Kalman J.M., Kistler P.M., Chieng D., Tonchev I.R., Sugumar H., Voskoboinik A., Schwartz L.A., McLellan A.J., Prabhu S., Ling L.-H., Al-Kaisey A., Parameswaran R., Anderson R.D., Lee G., and Kalman J.M.

Abstract

OBJECTIVES: This study sought to report P-wave morphology (PWM) from a series of paraseptal (PS) atrial tachycardia (AT), revise then prospectively evaluate a simplified PWM algorithm against a contemporary consecutive cohort with focal AT. BACKGROUND: The 2006 PWM algorithm was useful in predicting the origin of focal AT. An updated algorithm was developed given advances in multipolar 3-dimensional mapping, potential limitations of PWM in separating PS sites, and a renewed interest in the P-wave in mapping non-pulmonary vein triggers. METHOD(S): The PWM from a consecutive series of 67 patients with PS AT were analyzed. PS sites included were coronary sinus ostium, perinodal, left and right septum, septal tricuspid annulus, superior mitral annulus, and noncoronary cusp. Next the P-wave algorithm was revised and prospectively evaluated by 3 blinded assessors. RESULT(S): The P-wave for PS sites was neg/pos (n = 50), iso/pos (n = 10), or isoelectric (n = 4) in lead V1 (96%). The P-wave algorithm was modified and prospectively applied to 30 consecutive patients with focal AT who underwent successful ablation. Foci (n = 30) originated from the right atrium (33.3%), left atrium (30%), and PS (36.7%). Using the PW algorithm, the correct anatomic location was identified in 93%. Incorrect interpretation of the terminal positive P-wave component (n = 3) and initial negative P-wave deflection (n = 1) in lead V1 misidentified 4 paraseptal cases. CONCLUSION(S): The revised PWM algorithm offers a simplified and accurate method of localizing the responsible site for focal AT. The P-wave remains an important first step in mapping atrial arrhythmias.Copyright © 2021 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

Published
2021

37. A Comparative Study on the Numbers of Operations Used in the Computation of Value of Combinations (n¦r)

Author

Allwin Antony M. B., Parameswaran R., Athul K. and Allwin Antony M. B., Parameswaran R., Athul K.

Abstract

Several different methods are used to compute the value of combinations. A comparison between the two methods of computing the value of combinations viz traditional method involving the use of factorial notations in the formula of  and the method of computing the value of combinations by the repeated divisions with a specific lower bound ‘p’ associated with ‘n’ where n and p are positive integers is made.

Published
2021

44. Multipolar mapping with the high-density grid catheter compared with conventional point-by-point mapping to guide catheter ablation for focal arrhythmias.

Author

Morton J.B., McLellan A.J., Kistler P.M., McGavigan A.D., Kalman J.M., Lee G., Chieng D., Lahiri A., Sugumar H., Al-Kaisey A., Parameswaran R., Anderson R.D., Prabhu S., Ling L.-H., Morton J.B., McLellan A.J., Kistler P.M., McGavigan A.D., Kalman J.M., Lee G., Chieng D., Lahiri A., Sugumar H., Al-Kaisey A., Parameswaran R., Anderson R.D., Prabhu S., and Ling L.-H.

Abstract

Background: Multipolar catheters provide high-density mapping which may reduce the procedural duration and improve the success of catheter ablation (CA) for focal arrhythmias. The high-density grid (HDG) catheter is a 16 electrode mapping catheter with bipole recordings at orthogonal splines. The aim of this study is to compare the clinical and procedural features from a cohort who underwent CA for focal arrhythmias using multipolar mapping (MPM) with age and case-matched cohort using point-by-point (PbyP) mapping. Method(s): Consecutive patients undergoing CA for focal arrhythmias between October 2018 and January 2020 guided by MPM were compared with PbyP mapping with the ablation catheter over a similar period. Demographics, procedural features, and outcomes were compared. Result(s): A total of 54 patients (27 in MPM vs. 27 in PbyP mapping) underwent CA for 68 focal arrhythmias (26 atrial and 42 ventricular). In the MPM group, the electrogram at the successful site was significantly earlier (39 +/- 11 ms) than in the PbyP group (33 +/- 7 ms; p =.02). In the MPM group, the mapping time (35 +/- 24 vs. 53 +/- 31 min in PbyP; p =.03) and procedural duration (126 +/- 42 vs. 153 +/- 39 min in PbyP; p =.02) were significantly shorter. There was no significant difference in radiofrequency and fluoroscopy times, acute procedural success, and arrhythmia recurrence. Conclusion(s): MPM with the HDG catheter for focal tachycardias identified earlier activation times and was associated with shorter mapping and procedure duration with equivalent success to PbyP mapping.Copyright © 2020 Wiley Periodicals LLC

Published
2020

46. Atrial Fibrillation Structural Substrates: Aetiology, Identification and Implications

Author

Al-Kaisey, AM, Parameswaran, R, Kalman, JM, Al-Kaisey, AM, Parameswaran, R, and Kalman, JM

Abstract

Atrial remodelling in AF underlines the electrical, structural and mechanical changes in the atria of patients with AF. Several risk factors for AF contribute to the development of the atrial substrate, with some evidence that atrial remodelling reversal is possible with targeted intervention. In this article, the authors review the electrophysiological changes that characterise the atrial substrate in patients with AF risk factors. They also discuss the pitfalls of mapping the atrial substrate and the implications for developing tailored ablation strategies to improve outcomes in patients with AF.

Published
2020

47. Multipolar mapping with the high-density grid catheter compared with conventional point-by-point mapping to guide catheter ablation for focal arrhythmias

Author

Chieng, D, Lahiri, A, Sugumar, H, Al-Kaisey, A, Parameswaran, R, Anderson, RD, Prabhu, S, Ling, L-H, Morton, JB, McLellan, AJ, Lee, G, Kalman, JM, McGavigan, AD, Kistler, PM, Chieng, D, Lahiri, A, Sugumar, H, Al-Kaisey, A, Parameswaran, R, Anderson, RD, Prabhu, S, Ling, L-H, Morton, JB, McLellan, AJ, Lee, G, Kalman, JM, McGavigan, AD, and Kistler, PM

Abstract

BACKGROUND: Multipolar catheters provide high-density mapping which may reduce the procedural duration and improve the success of catheter ablation (CA) for focal arrhythmias. The high-density grid (HDG) catheter is a 16 electrode mapping catheter with bipole recordings at orthogonal splines. The aim of this study is to compare the clinical and procedural features from a cohort who underwent CA for focal arrhythmias using multipolar mapping (MPM) with age and case-matched cohort using point-by-point (PbyP) mapping. METHODS: Consecutive patients undergoing CA for focal arrhythmias between October 2018 and January 2020 guided by MPM were compared with PbyP mapping with the ablation catheter over a similar period. Demographics, procedural features, and outcomes were compared. RESULTS: A total of 54 patients (27 in MPM vs. 27 in PbyP mapping) underwent CA for 68 focal arrhythmias (26 atrial and 42 ventricular). In the MPM group, the electrogram at the successful site was significantly earlier (39 ± 11 ms) than in the PbyP group (33 ± 7 ms; p = .02). In the MPM group, the mapping time (35 ± 24 vs. 53 ± 31 min in PbyP; p = .03) and procedural duration (126 ± 42 vs. 153 ± 39 min in PbyP; p = .02) were significantly shorter. There was no significant difference in radiofrequency and fluoroscopy times, acute procedural success, and arrhythmia recurrence. CONCLUSION: MPM with the HDG catheter for focal tachycardias identified earlier activation times and was associated with shorter mapping and procedure duration with equivalent success to PbyP mapping.

Published
2020

49. Poster display II clinical general

Author

Gurgenyan, S. V. Svetlana, Vatinyan, S. K. H., Nikogosyan, K. G., Edilyan, L. B., Chobanyan, B. G., Lacourcière, Y., Marcel Dumont, M., Lefebvre, J., Poirier, L., Côté, C., Peix, A. Amalia, Alonso, O., Chae, I. H., Chung, J. K., Gutierrez, C., Kropp, J., Onsel, C., Silvasi, I., Llerena, L., Padhy, A. K., Garcia-Barreto, D., Trapaga, A., Asen, L., Infante, O., Ponce, F., Cabrera, L. O., Valiente, J., Tornes, F., Guerrero, I., Zayas, R., ones, M. A. Quin, Castro, J., Fayad, Y., Carrillo, R., Paz, A. De, Mehlsen, J. Jesper, Hædersdal, C., Daou, D. Doumit, Benada, A., Lebtahi, R., Idy-Peretti, I., Guludec, D. Le, Coaguila, C., Vilain, D., Leenhardt, A., Heinicke, N. Norbert, Benesch, B., Kaiser, T., Seegmüller, M., Schönberger, J., Eilles, C., Riegger, G. A. J., Holmer, S., Luchner, A., Kouris, N. T. Nikos, Kontogianni, D. D., Goranitou, G. S., Sifaki, M. D., Kalkandi, E. M., Grassos, H. E., Papoulia, E., Babalis, D. K., Moralidis, E. Efstratios, Spyridonidis, T., Arsos, G., Karakatsanis, K., Karatzas, N., Parameswaran, R. V. Ramanathapuram, Sundaram, P. S. Palaniswamy Shanmuga, Padma, S., Haridas, K. K., Zachariah, M., Kumar, S., Feola, M. Mauro, Leonardi, G., Peano, S., Bianchi, A., Dutto, P., Guala, E., Biggi, A., Uslenghi, E., Filardi, P. Pasquale Perrone, Pace, L., Dellegrottaglie, S., Corrado, L., Cafiero, M., Camerino, R., Maglione, A., Polimeno, M., Zarrilli, A., Chiariello, M., Giorgetti, A. Assuero, Gimelli, A., Marini, C., Schluter, M., Kusch, A., D’Aragona, I., Marzullo, P., Gimelli, A. Alessia, Stanislao, M., Zanco, P., Inglese, E., Bertelli, P., Valle, G., Tassone, F., Pepino, R., Francini, A., Garrone, O., Occelli, M., Merlano, M., Florimonte, L. Luigia, Pagani, L., Piatti, L., Butti, I., Maffioli, L. S., Casorelli, E., Dottore, F. Del, Gentili, G., Agostini, M., Pieri, P. L. Pierluigi, Milan, E., Giubbini, R. Raffaele, Mazzanti, M. Marco, Serenelli, M., Perna, G. P., Ferro, A., Duilio, C., Santomauro, M., Salvatore, M., Cuocolo, A. Alberto, Bertagna, F., Bosio, G., Terzi, A., Paghera, B., Kaneta, T. Tomohiro, Otani, H., Hakamatsuka, T., Fukuda, H., Nakazato, R. Ryo, Moroi, M., Kunimasa, T., Furuhashi, T., Sugi, K., Yasuhi, W. Watanabe, Akihiro, S., Yukawa, A., Ryu, K., Kimio, T., Yasuhiko, T., Nariaki, E., Yasunori, W., Akashi, Y. J. Yoshihiro, Musha, H., Kida, K., Itoh, K., Inoue, K., Kawasaki, K., Hashimoto, N., Nakazawa, K., Miyake, F., Fukuzawa, S. Shigeru, Ozawa, S., Inagaki, M., Sugioka, J., Okino, S., Matsuo, S. Shinro, Matsumoto, T., Nakae, I., Masuda, D., Horie, M., Mori, Y. Yoshitomo, Takahashi, K., Masai, M., Kawasaki, D., Kanemori, T., Okuda, S., Tanabe, K., Ohyanagi, M., Takahashi, K. Keiko, Masai, M., Mori, Y., Tanabe, K., OKuda, S., Toyama, T. Takuji, Hoshizaki, H., Seki, R., Isobe, N., Kawaguchi, R., Oshima, S., Taniguchi, K., Nakagawa, K. Keiichi, Sekine, T., Yamazaki, M., Komuro, I., Kim, K. M. Kyeong Min, Teramoto, N., Jino, H., Ohta, Y., Watabe, H., Hayashi, T., Iida, H., Nishimura, T. Tohru, Nagae, A., Morishima, K., Shigeyama, T., Shimoyama, K., Yoshino, H., Kawai, Y. Yuko, Jeong, S. Y., Lee, J. Jae-Tae, Seo, J. H., Bae, J. H., Ahn, B. C., Chae, S. C., Lee, K. B., Cho, I. Ihnho, Chun, K., Won, K., Lee, H., Hong, G., Park, J., Shin, D., Kim, Y., Shim, B., Pavlovic, J. Maksimovic, Peovska, I. Irena, Vavlukis, M., Gorceva, D. Pop, Majstorov, V., Alexanderson, E. Erick, Meave, A., Ricalde, A., Teresinska, A. Anna, Sliwinski, M., Konieczna, S., Szymanska, M., Hendzel, P., Juraszynski, Z., Debski, A., Szumilak, B., Kostkiewicz, M. Magdalena, Wilkolek, P., Pasowicz, M., Klimeczek, P., Pieniazek, P., Przewlocki, T., Pieculewicz, M., Tracz, W., Szot, W., Trebacz, J., Zmudka, K., Podolec, P., Dziuk, M. Miroslaw, Kazmierczak, A., Kot, E., Pietrzykowski, J., Cholewa, M., Coutinho, M. C. Maria Azevedo, Correia, M. J., Cantinho, G., Conceição, I., Bernardes, A., Silva, A., Gaspar, F., Cunha, J. A. Correia da, Lourenço, C. Cândida, Roque, C., Ferrer-Antunes, A., Ferreira, M., Providência, L. A., Lima, J., Abreu, A. Ana, Castillejos, L., Henriksson, I., Oliveira, L., Rosário, L., Geão, A., Pereira, E., Colarinha, P., Romero-Farina, G., Candell-Riera, J., Aguadé-Bruix, S. Santiago, Leon, G. De, Caresia, A. P., Mila-Lopez, M., Garcia-Alonso, C., Pifarre-Montaner, P., Negre-Buso, M., Castell-Conesa, J., Mestre-Fusco, A., Porta-Biosca, F., Aguadé-Bruix, S. Santiago, Muxi, A. Africa, Paredes, P., Ortin, J., Duch, J., Diaz-Infante, E., Fuertes, S., Orus, J., Mont, L. L., Pons, F., Pollack, C., Hellermann, J. P., Namdar, M., Siegrist, P. T. Patrick, Koepfli, P., Bartenstein, N., Schurr, U., Jenni, R., Kaufmann, P. A., Hassad, R. Rim, Hamami, H., Sellem, A., Brahim, H. Ben, Caglar, M. Meltem, Mahmoudian, B., Aytemir, K., Kahraman, S., Arýcý, M., Kabakcý, G., Karabulut, E., Akincioglu, C. Cigdem, Berman, D. S., Nishina, H., Hayes, S. W., Kavanagh, P. B., Friedman, J. D., Slomka, P. J., Germano, G., Entok, E. Emre, Cavusoglu, Y., Vardareli, E., Timuralp, B., Cheetham, A., Naylor, V., Ghiotto, F., McGhie, J., Al-Housni, M. B., Kelion, A. D. Andrew, Hutchings, F., Hinton-Taylor, S., Birkbeck, P., Thatikonda, S., Feldkamp, M., Rosamond, T. Thomas, Raza, M., Panjrath, G. S. Gurusher, Haider, A., Jain, D., Yang, A., Schumacher, R., Reynolds, J., Clark, E., Speiser, D., Schindel, M., Hackney, T., Vacek, J., Jindal, V. Vikas, Dim, U. Uzodinma, Hamburg, L. M., Mouradian, V., Nichols, K. J., Akinboboye, O. O., Snyder, K., Polepalle, D., DePuey, G. Gordon, Khattak, H., Friedman, M., Thompson, L., Thompson, R. C. Randall, McGhie, A. I., Moser, K., O’Keefe, J. H., Fritsch, N., Bateman, T. M., Mut, F., Vidal, I., Rener, A., Nuñez, M., Alvarez, B., and Beretta, M. Mario

Published
2005
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50. P-wave Morphology in Focal Atrial Tachycardia: An Updated 2021 Algorithm to Predict Site of Origin

Author

Kistler, P., primary, Chieng, D., additional, Tonchev, I., additional, Sugumar, H., additional, McLellan, A., additional, Prabhu, S., additional, Voskoboinik, A., additional, Schwartz, L., additional, Parameswaran, R., additional, Anderson, R., additional, Al-Kaisey, A., additional, Ling, L., additional, Lee, G., additional, and Kalman, J., additional

Published
2021
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