myocardial weakness

例句：

1. 1. He was diagnosed with myocardial weakness, which made him feel extremely weak.
   他被诊断出心肌虚弱，这让他感到非常虚弱。
2. 2. The patient's condition worsened significantly after undergoing surgery, leading to myocardial weakness.
   患者在手术后病情明显恶化，导致心肌虚弱。
3. 3. Myocardial weakness can be a serious condition that requires immediate medical attention.
   心肌虚弱可能是一种严重的情况，需要立即医疗关注。