positive inotropic drug

例句：

1. 1. The positive inotropic drug has been shown to improve heart function.
   这种正性肌松药已被证明可以改善心脏功能。
2. 2. The patient was given a positive inotropic drug to help with his breathing.
   患者被给予一种正性肌松药来帮助他呼吸。
3. 3.The positive inotropic drug is used to treat conditions such as hypertension and heart failure.
   这种正性肌松药用于治疗高血压和心脏病等疾病。