A case report of percutaneous intramyocardial septal radiofrequency ablation in an adult with re-obstruction after Morrow procedure

Abstract

Background Some patients with hypertrophic cardiomyopathy (HCM) reoccur with drug-refractory symptoms but are not eligible for reoperation after the morrow procedure. Traditional treatment options are limited. We present the first case of the use of ultrasound-guided percutaneous intramyocardial septal radiofrequency ablation (PIMSRA) for the treatment of a patient with HCM combined with congenital anatomically corrected malposition of the great arteries (MGA) after Morrow procedure. Case Summary A 61-year-old male patient with congenital MGA, who had been treated with the Morrow procedure for HCM, had worsening symptoms in recent years that were difficult to control medically. he was diagnosed with occult-obstructive HCM by stress echocardiography. After multidisciplinary discussion, this patient was treated with PIMSRA. The postoperative clinical outcome was remarkable, with a significant decrease in septal thickness and disappearance of left anterior branch conduction block. Conclusion PIMSRA is feasible and can be one of the options for the treatment of patients with HCM, especially those who can not choose Morrow procedure. However, it still needs a large sample of clinical trials to validate its clinical effectiveness.