Evaluation of trans-isthmus conduction time percentile in predicting complete bidirectional conduction block of typical atrial flutter
10.3969/j.issn.1004-8812.2023.12.004
- VernacularTitle:术中峡部传导间期百分比对典型心房扑动导管消融终点判定的有效性评估
- Author:
Hua WANG
1
;
Bo LI
;
Jing-Xia HAO
;
Hui-Min ZHANG
;
Tao ZHANG
;
Ying-Qian ZHANG
Author Information
1. 050000 河北石家庄,河北省儿童医院心内科
- Keywords:
Atrial flutter;
Percentage of local conduction time;
Catheter ablation;
Cavotricuspid isthmus;
Bidirectional block
- From:
Chinese Journal of Interventional Cardiology
2023;31(12):911-914
- CountryChina
- Language:Chinese
-
Abstract:
Objective The purpose of this study was to evaluate the predictive strength using the percentile of trans-isthmus conduction time during ablation of cavotricuspid isthmus(CTI)-independent typical atrial flutter for complete bidirectional conduction block.Methods This study was conducted with data from patients with typical atrial flutter(AF)who underwent ablation between February 2021 and February 2023(35 cases in the Beijing Anzhen Hospital,2 cases in the Children's Hospital of Hebei Province).Atrial flutter was induced during the operation,and linear ablation along the tricuspid valve ring to inferior vena cava was performed by anatomic ablation.The data collected were baseline clinical characteristics,Tachycardia Cycle Length(TCL),local conduction interval under coronary sinus pacing before ablation(P-ABL1),local conduction interval under coronary sinus pacing after ablation(P-ABL2).The percentage of P-ABL2 to TCL after ablation was calculated to evaluate the value of post-ablation local conduction interval percentage in the diagnosis of AF ablation endpoint,and its effectiveness was verified by the post-ablation activation sequence.Results All enrolled patients underwent ablation,and CTI was linearly blocked by parallel activation marker test.The TCL was(310.00±46.32)ms.The P-ABL1 was(92.16±27.65)ms and the P-ABL2 was(173.65±16.35)ms.Results significant difference between the two groups(P＜0.001).The percentage of P-ABL2 to TCL was(0.81±0.12).The percentage is close to 1,which is higher for evaluating the specificity and effectiveness of CTI bidirectional block.Conclusions The ablation endpoint of CTI block can be predicted by using the P-ABL1 before surgery,combined with the percentage of local conduction time after ablation.
