抑交感神经胺类药物异丙基肾上腺素,在呼吸系统疾病中作为支气管扩张剂。在心肌梗塞后心源性休克、循环衰竭、心脏传导阻滞、以及败血症性休克时作为心脏兴奋剂,已应用于临床。作为一种乙型受体的直接兴奋剂,它起到使平滑肌血管扩张的作用,并且可作为一种节律性和肌力性药物。然而,由于它能使心肌氧耗量剧烈增加,因此,对冠心病、严重二尖瓣或主动脉 The sympathomimetic amine isoproterenol is used as a bronchodilator in respiratory diseases. Has been used clinically as a cardiac stimulant in cardiogenic shock, circulatory failure, heart block, and septic shock after myocardial infarction. A direct stimulant of beta receptors, it acts to dilate smooth muscle vasculature and acts as a rhythmic and myotonic agent. However, due to its drastic increase in myocardial oxygen consumption, coronary heart disease, severe mitral or aortic