Objective: To report a case of severe obstructive hypertrophic cardiomyopathy (HOCM) managed with percutaneous alcohol septal ablation (ASA) and to review current diagnostic and therapeutic updates.
Methods: A single case report (CARE guideline) combined with a narrative literature review of current guidelines and trials through July 2026.
Results: A 76-year-old woman with severe HOCM and an invasively measured resting peak-to-peak left ventricular outflow tract gradient of 170 mmHg and severe SAM-related mitral regurgitation underwent ASA (4 mL absolute alcohol into the first septal branch), reducing the gradient to 31 mmHg immediately, with no high-grade atrioventricular block and discharge on day 5.
Conclusion: In an elderly patient at high surgical risk with favorable septal anatomy, ASA is a feasible and hemodynamically effective septal-reduction option at experienced centers, requiring close surveillance for conduction complications and long-term outcomes.