Patients Selection
20 consecutive patients with HOCM and LVOT gradients of ≥50 mmHg at rest
and drug-refractory symptoms (NYHA class II or III) were sequentially
enrolled. The protocol was approved by the ethics committee of Sir Run
Run Shaw Hospital. All patients provided full informed consent. All
echocardiography and CMR data was anonymized, and no identifiable
patient data were used.