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近年来国内外进一步研究证明,血管扩张剂能降低心脏的前后负荷,从而使心血排出量增加,明显改善心功能,治疗急慢性心力衰竭。通过临床实践证明,血管扩张剂在肺心病治疗中,具有特殊地位,现略加讨论。一、血管扩张剂治疗心力衰竭的主要机理心泵排血功能受下列因素调节:1、前负荷,即回心血量或心室舒张末期容量;2、心肌收缩力;3、后负荷,即心室射血的阻抗或外周血管阻力;4、心率;5、心室收缩的协
In recent years, further studies at home and abroad proved that vasodilators can reduce the heart before and after the load, so that increased cardiac output, significantly improve cardiac function, the treatment of acute and chronic heart failure. Proved by clinical practice, vasodilators in the treatment of pulmonary heart disease, has a special status, is slightly discussed. First, the main mechanism of vasodilator treatment of heart failure Cardiac pump blood flow by the following factors: 1, before the load, that is, back to the amount of blood or ventricular end-diastolic volume; 2, myocardial contractility; 3, after the load, Blood resistance or peripheral vascular resistance; 4, heart rate; 5, systolic ventricular systolic