论文部分内容阅读
治疗左心衰竭的目的是,在保持动脉压不致过低的基础上,增加心排出量,降低左室充盈压。一般情况下,当动脉压正常或梢高时,选用扩张血管药,动脉压处于边缘水平时则宜选用正性收缩剂。但是,因为动脉压=心排出量×阻力,通过校正扩张血管药物的剂量,常可使心排出量增加而血压则不变甚或稍有增加。扩张血管药能使高阻力-低排出量变为低阻力-高排出量状态。因此,在边缘性血压的左室衰竭患者,并不一定忌用扩张血管药治疗。然而,在滴注硝普钠时,即使血压轻度下降,特别是在有冠心病的患者,应该注意。这些患者以用正性收缩剂或正性收缩剂与扩张血管药合用较为妥当。
The purpose of treatment of left heart failure is to maintain the arterial pressure is not too low on the basis of increased cardiac output and reduce left ventricular filling pressure. Under normal circumstances, when the normal arterial pressure or tip high, the choice of dilated blood vessels, arterial pressure at the edge of the level should be used when positive shrinkage agent. However, because of arterial pressure = cardiac output × resistance, cardiac output can often be increased by correcting the dose of vasodilator medication without any change or even a slight increase in blood pressure. Dilated vascular drugs can make high resistance - low discharge into low resistance - high discharge status. Therefore, marginal blood pressure in patients with left ventricular failure does not necessarily avoid the use of dilation of vascular medicine. However, when sodium nitroprusside is instilled, even a slight drop in blood pressure, especially in patients with coronary heart disease, should be noted. These patients with positive or positive contraction of the contraction of drugs and dilation of blood vessels more appropriate.