Transapical Beating-Heart Septal Myectomy for Obstructive Hypertrophic Cardiomyopathy After Failed Septal Reduction...

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Devices

Background:

• Obstructive hypertrophic cardiomyopathy (oHCM) poses significant challenges, often requiring interventions.
• Septal reduction therapy (SRT) aims to alleviate symptoms but can fail in some patients.
• Transapical beating-heart septal myectomy (TA-BSM) is an alternative surgical approach.

Purpose of the Study:

• To evaluate the efficacy of TA-BSM in patients with oHCM who previously underwent unsuccessful SRT.
• To compare the clinical outcomes of TA-BSM in patients with prior SRT versus those undergoing primary TA-BSM.
• To assess the safety and effectiveness of TA-BSM as a secondary intervention for oHCM.

Main Methods:

• A retrospective study matched 40 patients who underwent TA-BSM after failed SRT with patients who had primary TA-BSM.
• The primary outcome was procedural success, defined by left ventricular outflow tract gradient and mitral regurgitation severity at 3-month follow-up.
• Preoperative and postoperative clinical data, including arrhythmias and quality of life, were analyzed.

Main Results:

• Procedural success was achieved in 85% of patients with prior SRT and 88% in the primary TA-BSM group.
• Both groups showed significant reductions in left ventricular outflow tract gradients and improvements in mitral regurgitation.
• Patients with prior SRT had higher incidences of preoperative conduction abnormalities and ventricular tachycardia.

Conclusions:

• TA-BSM, guided by transesophageal echocardiography, yields satisfactory outcomes in oHCM patients.
• The comparable results support TA-BSM's use in symptomatic patients following failed SRT.
• TA-BSM is a viable option for managing oHCM after unsuccessful prior interventions.