肺源性心脏病降低肺动脉高压最关键的是（） ["利尿剂","呼吸兴奋剂","纠正缺氧","支气管扩张剂","强心剂"]
肠鸣音
心电图中，正常QTc的最高值为（） ["0.12s","0.20s","0.32s","0.40s","0.44s"]
肺源性心脏病患者，因呼吸微弱，应用气管插管及机械通气。3小时后PaO2自40mmHg升至80mmHg，PaCO2自75mmHg降至25mmHgpH7.55，BE-0.5，应考虑（） ["原发性呼吸性酸中毒，代偿期","原发性代谢性碱中毒","原发性呼吸性碱中毒合并原发性代谢性碱中毒","原发性呼吸性碱中毒，失代偿期","原发性呼吸性酸中毒合并原发性代谢性碱中毒"]
心电图中，T波的振幅不应低于同导联R波的（） ["1/2","1/4","1/6","1/8","1/10"]
板状腹
