COMPLICATIONS OF LOW-DOSE, ECHO-GUIDED ALCOHOL …
COMPLICATIONS OF LOW-DOSE, ECHO-GUIDED ALCOHOL SEPTAL ABLATIONS FOR OBSTRUCTIVE HYPERTROPHIC CARDIOMYOPATHY
J. Veselka, D. Zemanek, P. Tomasov, S. Homolova, R. Adlova
CardioVascular Center, University Hospital Motol, Prague, Czech Republic
Background: Alcohol septal ablation (ASA) is a catheter-based intervention that has been used as an alternative to surgical myectomy in highly symptomatic patients with hypertrophic obstructive cardiomyopathy (HOCM).
Methods: This retrospective study was designed to evaluate the incidence of major complications in the mid-term follow-up of low-dose (≤2.5 ml of ethanol), echo-guided alcohol septal ablation.
Results: A total of 101 consecutive patients (56±15 years) with highly symptomatic HOCM were enrolled. At 6 months, there was a significant decrease in resting outflow gradient accompanied by reduction in basal septal diameter and improvement in symptoms (p < 0.01). Two patients (2%) experienced procedural ventricular tachycardias terminated by electrical cardioversion. A total of 87 patients (86%) underwent an uneventful post-procedural hospital stay. The post-procedural complete heart block occurred in 10 patients (10%), and subsequent permanent pacemaker was implanted in 4 cases (4%). Sustained ventricular arrhythmias requiring electrical cardioversion occurred in 4 patients (4%) within post-procedural hospital stay. Subsequently, ICD was not implanted in any of these cases. The patients were repeatedly examined by Holter ECG monitoring, and in the mid-term follow-up (6-50 months) they stayed asymptomatic and without any ventricular arrhythmias.
Conclusions: The present study demonstrates the same early incidence of complete heart block requiring permanent pacemaker implantation (4%) and sustained ventricular arrhythmias following low-dose, echo-guided ASA.
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