[Prognostic value of acute heart block after alcohol septal ablation in patients with hypertrophic obstructive cardiomyopathy].
OBJECTIVE
To investigate the prognostic value of acute heart block (AHB) after percutaneous transluminal septal myocardial ablation (PTSMA) in patients with hypertrophic obstructive cardiomyopathy (HOCM).


METHODS
Ninety-four HOCM patients underwent PTSMA were included in this study. Twelve-lead electrocardiograms were obtained during and post PTSMA. Association between clinic events and incidence of post-PTSMA AHB was analyzed.


RESULTS
AHB was induced in 26 patients by PTSMA and disappeared in 11 patients shortly post PTSMA, subacute intraventricular conduction disturbances was seen in 11 (42.3%), subacute I degrees AVB in 2 (7.7%) and subacute III degrees AVB in another 2 (7.7%) patients. Among 68 patients without AHB during PTSMA, intraventricular conduction disturbances was evidenced in 14 patients (20.6%), I degrees AVB in 2 (2.9%) and III degrees AVB in 1 patient (1.5%) after PTSMA. AHB patients with subacute heart block were associated with poor prognosis (conduction block duration was 42.00 h) while patients without AHB was associated with benign prognosis even with new onset of subacute heart block (conduction block duration was 7.33 h, P < 0.01).


CONCLUSIONS
Patients with AHB during PTSMA are at higher risk for subacute heart block, especially intraventricular conduction disturbances. AHB patients with subacute heart block were associated with poor prognosis and longer recovery time of conducting system.
Hou
Ai-Jie
AJ
Department of Cardiology, Liaoning Provincial People's Hospital, Shenyang 110016, China. houaijie@medmail.com.cn
Duan
Na
N
Yang
Lin
L
Li
Hui-Jun
HJ
Li
Zhan-Quan
ZQ
Yuan
Long
L
Guan
Ru-Ming
RM
Liu
Ying
Y
D000328:Adult; D002312:Cardiomyopathy, Hypertrophic / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects*; D005260:Female; D006327:Heart Block / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D011379:Prognosis