Surgical Ablation Supplemented by Ethanol Injection for Ventricular
Tachycardia Refractory to Percutaneous ablation
Abstract
Background: Combination of endocardial and epicardial approach has
improved the overall success rate of ventricular tachycardia (VT)
ablation in patients with cardiomyopathy. However, the origins of some
VTs are truly intramural or close to coronary arteries, which make this
combined strategy either prone to failure or too risky. Objectives: This
observational study aimed to explore the feasibility and efficacy of
direct epicardial ablation combined with intramural ethanol injection
via surgical approach for such VTs. Methods: Six consecutive patients
with recurrent sustained VT refractory to combined endocardial and
epicardial radiofrequency ablation were included. Direct epicardial
access was achieved through limited left thoracotomy in 3 patients and
median sternotomy in other 3 patients. Ablation was performed using
irrigation catheter guided by electroanatomic mapping. Ethanol was
injected in all patients to reinforce transmural lesions. The primary
outcome was freedom of sustained VT determined by device interrogation
and periodical 24h-holter recordings subsequently. Results: Over a
median follow-up of 22 months (range, 6~65), all
patients remained free of sustained VT. One patient died of pulmonary
infection one year after the procedure. Conclusions: A hybrid strategy
of surgical ablation combined with intramural ethanol injection is
feasible and effective in patients with multiple failed percutaneous
ablation attempts.