OBJECTIVES The aim of this meta-analysis was to compare long-term outcomes after myectomy and alcohol septal ablation (ASA) in patients with hypertrophic cardiomyopathy (HCM). BACKGROUND Surgical myectomy and ASA are both accepted treatment options for medical therapy-resistant obstructive HCM. Previous meta-analyses only evaluated short-term outcomes. METHODS A systematic review was conducted for eligible studies with a follow-up of at least 3 years. Primary outcomes were all-cause mortality and (aborted) sudden cardiac death (SCD). Secondary outcomes were periprocedural complications, left ventricular outflow tract gradient, and New York Heart Association functional class after ≥3 months, and reintervention. Pooled estimates were calculated using a random-effects meta-analysis. RESULTS Sixteen myectomy cohorts (n = 2,791; mean follow-up, 7.4 years) and 11 ASA cohorts (n = 2,013; mean follow-up, 6.2 years) were included. Long-term mortality was found to be similarly low after ASA (1.5% per year) compared with myectomy (1.4% per year, p = 0.78). The rate of (aborted) SCD, including appropriate implantable cardioverter defibrillator shocks, was 0.4% per year after ASA and 0.5% per year after myectomy (p = 0.47). Permanent pacemaker implantation was performed after ASA in 10% of the patients compared with 4.4% after myectomy (p < 0.001). Reintervention was performed in 7.7% of the patients who underwent ASA compared with 1.6% after myectomy (p < 0.001). CONCLUSIONS Long-term mortality and (aborted) SCD rates after ASA and myectomy are similarly low. Patients who undergo ASA have more than twice the risk of permanent pacemaker implantation and a 5 times higher risk of the need for additional septal reduction therapy compared with those who undergo myectomy.

Alcohol septal ablation, Hypertrophic cardiomyopathy, Myectomy, Septal reduction therapy, Sudden cardiac death
dx.doi.org/10.1016/j.jchf.2015.06.011, hdl.handle.net/1765/82490
JACC: Heart Failure
Department of Cardiology

Liebregts, M, Vriesendorp, P.A, Mahmoodi, B.K, Schinkel, A.F.L, Michels, M, & ten Berg, J.M. (2015). A systematic review and meta-analysis of long-term outcomes after septal reduction therapy in patients with hypertrophic cardiomyopathy. JACC: Heart Failure (Vol. 3, pp. 896–905). doi:10.1016/j.jchf.2015.06.011