chronic heart failure

例句：

1. 1. He wasdiagnosed with chronic heart failure and had to stop working.
   他被诊断出患有慢性心脏病，不得不停止工作。
2. 2. The patient's condition worsened, leading to chronic heart failure.
   患者的病情恶化，导致慢性心脏病。
3. 3. Chronic heart failure can be life-threatening if left untreated.
   未经治疗的慢性心脏病可能危及生命。