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Franceschi F, Bonan R, Khairy P, Dubuc M, Thibault B, Macle L, Talajic M, Roy D, Koutbi L, Virmani R, Guerra PG. Histopathological effects and evolution of transvenous -radiation applications in right and left atria: an animal study. Europace 2011; 14:745-51. [DOI: 10.1093/europace/eur351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Guerra PG, Talajic M, Thibault B, Dubuc M, Roy D, Macle L, Leung TK, Arsenault A, Harel F, Grégoire J, Bonan R. β-Radiation for the Creation of Linear Lesions in the Canine Atrium. Circulation 2004; 110:911-4. [PMID: 15302779 DOI: 10.1161/01.cir.0000139865.39885.03] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Creating linear lesions is important for the treatment of arrhythmias such as atrial flutter and fibrillation. Making these lesions with standard radiofrequency catheters can be difficult and may result in charring and thrombosis. The purpose of this study was to evaluate β-radiation as a novel energy source for creating linear myocardial lesions.
Methods and Results—
Eight dogs with intact conduction across the cavotricuspid isthmus were studied. The isthmus was irradiated (25 to 50 Gy) with strontium/yttrium-90 delivered via a deflectable 7F catheter (Novoste Corporation). There were no immediate effects, but bidirectional conduction block developed during follow-up studies in 7 of 8 dogs. The dog without conduction block received 25 Gy. After the animals were euthanized, histology revealed transmural, linear areas of fibrosis without any thrombus.
Conclusions—
β-Radiation can safely and effectively create linear lesions that are contiguous and nonthrombogenic. This energy source may become an interesting adjunct to radiofrequency for the treatment of atrial flutter and fibrillation.
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Affiliation(s)
- Peter G Guerra
- Department of Medicine and Research Center, Montreal Heart Institute, 5000 Belanger East, Montreal, Quebec, Canada H1T 1C8.
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