Effects of different radiofrequency ablation methods on atrioventricular block in patients with atrioventricular nodal reentrant tachycardia
- VernacularTitle:不同射频消融方法对房室传导阻滞的影响
- Author:
Ping LI
;
Hui CAI
;
Qigao ZHANG
;
Ruihua CHEN
;
Shisen JIANG
- Publication Type:Journal Article
- Keywords:
Dual Atrioventricular nodal pathway;
Atrioventricular nodal reentrant tachycardia;
Radiofrequency catheter ablation
- From:
Journal of Medical Postgraduates
2003;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:Atrioventricular nodal reentrant tachycardia(AVNRT) is a common type of arrhythmia,for which radiofrequency ablation(RFCA) is the first therapeutic option.This study is to investigate the causes of 16 cases of temporary atrioventricular block(AVB) during RFCA and 2 cases of permanent AVB after RFCA in common and refractory AVNRT.Methods: We performed RFCA for 77 AVNRT patients by gradually increasing the ablation time,energy and frequency.Generally we chose the lower zone as the first position of ablation and,if invalid,moved the catheter gradually up to the middle or upper zone.Then we analyzed the correlation of AVB with A/V and H-wave in different positions.Results: The AVB risk was increased with the upward movement of the ablation zone and increase of A/V or H-wave(P 0.05). Conclusion: The method of gradually increasing the ablation time,energy and frequency can prevent temporary from permanent AVB.In the common AVNRT group,the middle and lower zone ablation,the multiple-peak A wave,small A wave and big V wave(A/V ≤ 0.45?0.37) with no H wave or H≤0.003?0.01 mV could significantly decrease the risk of RFCA related AVB,but the risk of AVB remains among the refractory AVNRT patients with CSO abnormality or expansion,even if with ablation in the lower zone.
