Mapping and ablation of left atrial roof-dependent tachycardias using an ultra-high resolution mapping system

被引:1
|
作者
Miyazaki, Shinsuke [1 ]
Hasegawa, Kanae [1 ]
Yamao, Kazuya [2 ]
Ishikawa, Eri [1 ]
Mukai, Moe [1 ]
Aoyama, Daisetsu [1 ]
Nodera, Minoru [1 ]
Yamaguchi, Junya [1 ]
Shiomi, Yuichiro [1 ]
Tama, Naoto [1 ]
Ikeda, Hiroyuki [1 ]
Fukuoka, Yoshitomo [1 ]
Ishida, Kentaro [1 ]
Uzui, Hiroyasu [1 ]
Iesaka, Yoshito [2 ]
Tada, Hiroshi [1 ]
机构
[1] Univ Fukui, Fac Med Sci, Dept Cardiovasc Med, Eiheiji Cho,23-3 Shimo Aiduki, Matsuoka, Fukui 9101193, Japan
[2] Tsuchiura Kyodo Gen Hosp, Cardiovasc Ctr, Tsuchiura, Ibaraki, Japan
关键词
Atrial tachycardia; Roof line; Ultra-high resolution mapping; Catheter ablation; FIBRILLATION; ACTIVATION;
D O I
10.1186/s12872-022-02505-z
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background Left atrial roof-dependent tachycardias (LARTs) are common macroreentrant atrial tachycardias (ATs). We sought to characterize clinical LARTs using an ultra-high resolution mapping system. Methods This study included 22 consecutive LARTs in 21 patients who underwent AT mapping/ablation using Rhythmia systems. Results Three, 13, 4, and 2 LART patients were cardiac intervention naive (Group-A), post-roof line ablation (Group-B), post-atrial fibrillation ablation without linear ablation (Group-C), and post-cardiac surgery (Group-D), respectively. The mean AT cycle length was 244 +/- 43 ms. Coronary sinus activation was proximal-to-distal or distal-to-proximal in 16 (72.7%) ATs. The activation map revealed 13 (59.1%) clockwise and 9 (40.9%) counter-clockwise LARTs. A 12-lead synchronous isoelectric interval was observed in 10/19 (52.6%) LARTs. The slow conduction area was identified on the LA roof, anterior/septal wall, and posterior wall in 18, 6, and 2 ATs, respectively. Twenty concomitant ATs among 13 procedures were also eliminated, and peri-mitral AT coexisted in 7 of 9 non-group-B patients. In group-B, the conduction gap was predominantly located on the mid-roof. Sustained LARTs were terminated by a single application and linear ablation in 6 (27.3%) and 9 (40.9%), while converting to other ATs in 7 (31.8%) LARTs. Complete linear block was created without any complications in all, however, ablation at the mid-posterior wall was required to achieve block in 4 (18.2%) procedures. During 14.0 (6.5-28.5) months of follow-up, 17 (81.0%) and 19 (90.5%) patients were free from any atrial tachyarrhythmias after single and last procedures. Conclusions The LART mechanisms were distinct in individual patients, and elimination of all concomitant ATs was required for the management.
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页数:12
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