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Prevalence and Characteristics of Left Atrial Tachycardia Following Left Atrial Catheter Ablation
Author(s) -
HASHIMOTO TORU,
TADA HIROSHI,
NAITO SHIGETO,
MIYAJI KOHEI,
YAMADA MINORU,
TADOKORO KAZUYOSHI,
KASENO KENICHI,
OSHIMA SHIGERU,
TANIGUCHI KOICHI
Publication year - 2007
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.2007.00614.x
Subject(s) - medicine , ablation , catheter ablation , atrial tachycardia , tachycardia , atrial fibrillation , complication , cardiology , ejection fraction , ventricular tachycardia , catheter , surgery , heart failure
Background: Left atrial tachycardia (AT) is a complication of left atrial catheter ablation (LACA) of atrial fibrillation (AF). However, its prevalence and characteristics have not been sufficiently clarified.Methods: We divided 121 patients who underwent LACA into 2 groups based on the results of AT occurrence after LACA (follow‐up period; 12 ± 7 months): an AT+ group and AT– group.Results: New‐onset left AT occurred in 30 patients (25%) 31 ± 51 days after LACA. Among the 26 patients with an early onset of AT, 4 underwent a second ablation for AT, and 21 became free of AT within 6 months without a repeat ablation procedure. Among the 4 patients with a late onset of AT (>2 months after the LACA), the tachycardia remitted without a repeat ablation procedure in a single patient within 6 months. Among 71 patients who underwent LACA with additional ablation lines, 22 (31%) developed new‐onset left AT. Among 50 patients who underwent LACA alone, 8 (16%) developed new‐onset left AT (P = 0.02).Conclusions: New‐onset left AT is a frequent complication of LACA for AF, especially in men and in patients with a low left ventricular ejection fraction. Early (<2 months) onset AT does not require a repeat ablation because it often represents a transient phenomenon and disappears spontaneously.