Is surgery for ventricular tachycardia too risky?

Area of Science:

• Cardiology
• Cardiac Surgery
• Electrophysiology

Background:

• Recurrent symptomatic ventricular tachycardia (VT) post-myocardial infarction (MI) carries a poor prognosis, with high mortality rates.
• Conventional drug therapy often fails to suppress VT, leading to consideration of cardiac surgery, though its efficacy has been debated.
• Previous studies reported high in-hospital mortality (5-23%) and limited 5-year survival (33-71%) after VT surgery.

Purpose of the Study:

• To evaluate the efficacy and safety of cardiac surgery for managing recurrent symptomatic VT after acute MI.
• To assess the impact of selecting surgical candidates based on left ventricular function.
• To compare surgical outcomes with medical therapy and implantable defibrillators.

Main Methods:

• Retrospective analysis of patients undergoing cardiac surgery for recurrent VT post-MI.
• Patient selection based on residual left ventricular function as a key operability criterion.
• Comparison of in-hospital mortality, long-term survival, and arrhythmia recurrence rates.

Main Results:

• Surgical intervention, when selecting patients based on left ventricular function, resulted in a significantly reduced in-hospital mortality of 1.3%.
• Four-year actuarial survival reached 85% in the surgical group.
• Approximately 75% of patients remained free from arrhythmia without anti-drug therapy four years post-surgery.

Conclusions:

• Cardiac surgery is a highly acceptable alternative therapy for selected patients with recurrent VT post-MI, especially those with risk factors.
• Improved patient selection criteria, focusing on left ventricular function, dramatically enhance surgical outcomes.
• Arrhythmia surgery offers a promising therapeutic option, improving survival and quality of life in this high-risk patient population.