[Prognostic impact of heart block during transcatheter closure of ventricular septal defect].
OBJECTIVE
To investigate the prognostic impact of heart block during the transcatheter closure of ventricular septal defect (VSD).


METHODS
Forty three patients developed complete left or right bundle branch block (CLBBB, CRBBB), incomplete left or right bundle branch block (ILBBB, IRBBB), and atrioventricular block (AVB) during and within 1 week post procedure were followuped at 1, 6, 12, 24, 36, 48 and 60 months post procedure. Electrocardiogram, dynamic electrocardiogram and transthoracic echocardiography were made.


RESULTS
Bundle branch block and atrioventricular block were detected in 26 patients (CLBBB n = 4, CRBBB n = 5, ILBBB n = 2, IRBBB n = 10 and third-degree AVB n = 5) during the transcatheter closure of VSD, and in 17 patients (CLBBB n = 5, CRBBB n = 2, first-degree AVB n = 3, second-degree I-type AVB n = 1 and third-degree AVB n = 6) within 1 week post procedure. Heart block disappeared in 33 patients (76.7%) before discharge, in 37 patients (86.1%) at 1 month and in 41 patients (95.4%) at 6 months post procedure. CLBBB or CRBBB was seen in two cases at 24 months after closure. There was no heart failure and serious cardiac dilatation during follow up.


CONCLUSIONS
The heart block occurred during the periprocedure period of transcatheter closure of VSD was a benign phenomenon without prognostic importance.
Song
Zhi-Yuan
ZY
Department of Cardiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China. zysong@public.cta.cq.cn
Li
Yong-Hua
YH
Chai
Hong
H
Li
Hua-Kang
HK
Yao
Qing
Q
Zhong
Li
L
Jing
Tao
T
Ran
Bo-Li
BL
Tong
Shi-Fei
SF
Liu
Jian-Ping
JP
D006328:Cardiac Catheterization / Q000009:adverse effects*; D004452:Echocardiography; D005500:Follow-Up Studies; D006327:Heart Block / Q000209:etiology*; D006345:Heart Septal Defects, Ventricular / Q000628:therapy*; D006801:Humans; D011379:Prognosis; D016896:Treatment Outcome