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作用特点:本品系直接血管扩张剂。药理作用类似硝酸甘油,不仅扩张阻力血管,也降低静脉张力,从而使血压下降,心脏前后负荷减低;在心脏功能不全病人,随着左室舒张末期压降低,心搏出指数和心排出量增加,而血压不变或稍下降,在左室功能改善的同时,因心脏总负荷减低使心肌需氧量减少,这优于正性收缩能药物和β阻滞剂。本品起效快(几秒钟),停药后作用消失快(5分钟左右),是目前抢救急性心肌梗塞并有泵衰竭病人较理想的血管
Features: This product is a direct vasodilator. Pharmacological effects similar to nitroglycerin, not only to expand resistance blood vessels, but also reduce venous tension, so that blood pressure, heart load before and after reduced; in patients with cardiac insufficiency, as left ventricular end diastolic pressure decreased, cardiac output index and cardiac output increased , While the blood pressure unchanged or slightly decreased, in improving left ventricular function at the same time, due to reduced total cardiac load to myocardial oxygen demand, which is better than positive systolic and beta blockers. The rapid onset of the product (a few seconds), the disappearance of the role of fast disappearance (about 5 minutes), is the rescue of acute myocardial infarction and pump failure patients ideal blood vessels