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一、啊些疾病对血管扩张剂效果最佳? 1.急性心肌梗塞并发心力衰竭:急性心肌梗塞时,洋地黄类药物加重心肌耗氧,使梗塞范围扩大,且易诱发心律失常,6小时内绝对禁用。血管扩张剂减轻心脏前,后负荷,增加心排血量,改善冠脉灌流,使心肌张力下降,梗塞范围缩小。 2.扩张型心肌病及心肌炎并发心力衰竭:扩张型心肌病及心肌炎(病毒性、风湿性、中毒性等)对洋地黄类药物耐受性差,且易出现中毒反应。血管扩张减轻心脏前、后负荷增加心排血量。
First, ah, some diseases on vasodilator best? 1. Acute myocardial infarction complicated by heart failure: acute myocardial infarction, digitalis drugs increase myocardial oxygen consumption, the infarct to expand, and easy to induce arrhythmia, within 6 hours Absolutely disabled. Vasodilators reduce pre-and post-cardiac load, increase cardiac output, improve coronary perfusion, reduce cardiac tension, and reduce infarct size. 2. Dilated cardiomyopathy and myocarditis complicated by heart failure: dilated cardiomyopathy and myocarditis (viral, rheumatic, toxic, etc.) to digitalis poor tolerance, and prone to toxic reactions. Vasodilation to reduce the heart before and after cardiac load increased cardiac output.