TY - JOUR
T1 - The role of superior vena cava in catheter ablation of long-standing persistent atrial fibrillation
AU - Xu, Kai
AU - Wang, Yuanlong
AU - Wu, Shaohui
AU - Zhou, Li
AU - Zhao, Liang
AU - Jiang, Weifeng
AU - Zhang, Xiaodong
AU - Liu, Xu
N1 - Publisher Copyright:
© Published on behalf of the European Society of Cardiology. All rights reserved.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - Aims The superior vena cava (SVC) has been established as an important source of atrial fibrillation (AF). The role of SVC in long-standing persistent AF and the efficacy of empiric electrical isolation of the SVC are still unclear. The purpose of this study was to judge the role of SVC in catheter ablation of long-standing persistent AF. Methods and results A total of 102 consecutive patients with long-standing persistent AF were enrolled. All patients underwent circumferential pulmonary vein isolation, complex fractionated atrial electrograms ablation, and linear ablation during the index procedure. Superior vena cava-triggered AF and an SVC associated with the maintenance of AF were evaluated by mapping catheters during the procedure. The arrhythmogenicity of the SVC was confirmed in only 1 of the patients (0.98%). At the end of 12 months follow-up, the arrhythmia-free survival rate after a single procedure was 43.1%. After the last procedure (mean 1.47 ± 0.58 procedures), sinus rhythm was maintained in 71 (69.6%) patients, 63 of whom without antiarrhythmic drugs. The patients in AF recurrence group had higher rates of right atrium enlargement (71 vs. 34%, P = 0.03), ≥2 procedures (65 vs. 34%, P < 0.05), longer AF duration (84 ± 46 vs. 45 ± 34 months, P < 0.05), and larger left atrium diameter (50 ± 5 vs. 45 ± 6 mm, P < 0.05). In the multivariate analysis, left atrium diameter and AF duration were independent predictors of AF recurrence. Conclusion The arrhythmogenic SVC is rarely detected in patients with long-standing persistent AF. Empiric SVC electrical isolation in the stepwise approach of long-standing persistent AF seems unnecessary.
AB - Aims The superior vena cava (SVC) has been established as an important source of atrial fibrillation (AF). The role of SVC in long-standing persistent AF and the efficacy of empiric electrical isolation of the SVC are still unclear. The purpose of this study was to judge the role of SVC in catheter ablation of long-standing persistent AF. Methods and results A total of 102 consecutive patients with long-standing persistent AF were enrolled. All patients underwent circumferential pulmonary vein isolation, complex fractionated atrial electrograms ablation, and linear ablation during the index procedure. Superior vena cava-triggered AF and an SVC associated with the maintenance of AF were evaluated by mapping catheters during the procedure. The arrhythmogenicity of the SVC was confirmed in only 1 of the patients (0.98%). At the end of 12 months follow-up, the arrhythmia-free survival rate after a single procedure was 43.1%. After the last procedure (mean 1.47 ± 0.58 procedures), sinus rhythm was maintained in 71 (69.6%) patients, 63 of whom without antiarrhythmic drugs. The patients in AF recurrence group had higher rates of right atrium enlargement (71 vs. 34%, P = 0.03), ≥2 procedures (65 vs. 34%, P < 0.05), longer AF duration (84 ± 46 vs. 45 ± 34 months, P < 0.05), and larger left atrium diameter (50 ± 5 vs. 45 ± 6 mm, P < 0.05). In the multivariate analysis, left atrium diameter and AF duration were independent predictors of AF recurrence. Conclusion The arrhythmogenic SVC is rarely detected in patients with long-standing persistent AF. Empiric SVC electrical isolation in the stepwise approach of long-standing persistent AF seems unnecessary.
KW - Atrial fibrillation
KW - Catheter ablation
KW - Superior vena cava
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U2 - 10.1093/europace/euw167
DO - 10.1093/europace/euw167
M3 - Article
C2 - 28073882
AN - SCOPUS:85031930752
SN - 1099-5129
VL - 19
SP - 1670
EP - 1675
JO - Europace
JF - Europace
IS - 10
ER -