Percutaneous Intramyocardial Septal Radiofrequency Ablation for Obstructive Hypertrophic Cardiomyopathy in Children

Percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) is an innovative minimally invasive ablation treatment. Under the real-time transthoracic echocardiography guidance, a radiofrequency electrode needle is introduced into the hypertrophied interventricular septum via the percutaneous intramyocardial approach. Then the needle tip is pushed to the target region of the interventricular septal (IVS) basal segment 8 to 10 mm from the subaortic valve. The main objective of PIMSRA is to reduce ventricular septal hypertrophy and left ventricular outflow tract obstruction by means of thermal ablation.