Septal myectomy after failed septal alcohol ablation

Area of Science:

• Cardiology
• Cardiovascular Surgery

Background:

• Septal myectomy is the gold standard for hypertrophic obstructive cardiomyopathy (HOCM).
• Alcohol septal ablation (ASA) is disproportionately used worldwide despite variable efficacy.
• Residual left ventricular outflow tract (LVOT) obstruction after ASA is linked to poor clinical outcomes.

Purpose of the Study:

• To evaluate the outcomes of rescue septal myectomy following failed alcohol septal ablation (ASA) in patients with hypertrophic obstructive cardiomyopathy (HOCM).
• To compare the risks and outcomes of rescue myectomy after ASA versus primary septal myectomy.

Main Methods:

• Review of clinical data for patients with HOCM undergoing ASA and subsequent rescue myectomy.
• Comparison of perioperative complication rates and long-term outcomes between rescue myectomy and primary myectomy groups.

Main Results:

• A substantial proportion of patients treated with ASA experience residual LVOT obstruction.
• Rescue septal myectomy after ASA is associated with increased perioperative complications.
• Outcomes after rescue myectomy, even with complete obstruction resolution, are compromised by prior ASA.

Conclusions:

• Alcohol septal ablation (ASA) frequently results in incomplete resolution of left ventricular outflow tract obstruction in hypertrophic obstructive cardiomyopathy (HOCM).
• Rescue septal myectomy following ASA carries higher risks and leads to compromised outcomes compared to primary myectomy.
• Septal myectomy remains the preferred initial treatment for significant HOCM obstruction.