myectomy in hypertrophic obstructive cardiomyopathy

例句：

1. 1.Myectomy is a surgical procedure used to treat certain types of heart disease.
   心肌切除术是一种用于治疗某些类型心脏病的手术程序。
2. 2.The patient underwent myectomy to relieve the pressure on his heart.
   患者接受了心肌切除术以减轻对他心脏的压力。
3. 3. Myectomy is often performed as a last resort in cases where other treatments have failed.
   在其它治疗方法失败的情况下，通常采用心肌切除术作为最后的手段。