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Clinical investigation of the durability of the lesions created by left atrial linear ablation with a cryoballoon
Author(s) -
Shigeta Takatoshi,
Okishige Kaoru,
Nishimura Takuro,
Aoyagi Hideshi,
Yoshida Hiroshi,
Nakamura Rena,
Hirao Tatsuhiko,
Sasano Tetsuo,
Hirao Kenzo,
Yamauchi Yasuteru
Publication year - 2020
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/jce.14379
Subject(s) - medicine , ablation , atrial fibrillation , pulmonary vein , roof , cardiology , line (geometry) , geometry , structural engineering , mathematics , engineering
Pulmonary vein isolation (PVI) and linear ablation with a roof line and bottom line on the left atrial (LA) posterior wall (LAPW) can be achieved with a cryoballoon (CB). This study sought to investigate the long‐term durability of these linear lesions. Methods and results Among 290 persistent patients with atrial fibrillation (AF) who had undergone linear ablation with a CB on the roof and bottom line of the LAPW in addition to the PVI, we analyzed those patients who underwent a re‐do AF ablation. Arrhythmia recurrence was confirmed in 70 (24%) out of 290 patients, and 47 (16%) patients underwent re‐do sessions. At the beginning of the re‐do ablation, we examined the reconnection sites of the linear lesions on the LAPW and PVI. Maintenance of the conduction block on the LAPW roof and bottom lines was observed in 35 out of 47 patients (74.5%), and 16 out of 35 patients (45.7%), respectively. The length of the roof line was significantly shorter in patients with preservation of the conduction block on the LAPW roof than in those without (36.2 ± 6.5 mm vs 41.6 ± 4.7 mm, P = .02). Conclusion Durable lesions could be obtained after linear ablation with the CB for the LAPW roof line, especially in those with a relatively short LAPW roof line. However, patients requiring touch‐up ablation with radiofrequency were included, and that was associated with a potential financial implication.