血管扩张剂用于治疗高血压已多年,近年来又被公认治疗左室衰竭,新近报告口服肼苯哒嗪治疗原发性肺动脉高压症,可有效地降低肺动脉阻力和增加心排血量。本文旨在探讨血管扩张剂对继发于慢性肺部疾病导致的肺动脉高压的疗效,作者研究了肺心病患者口服肼苯哒嗪后休息 Vasodilator for the treatment of hypertension has been for many years, in recent years has been recognized as treatment of left ventricular failure, recently reported oral hydralazine treatment of primary pulmonary hypertension, can effectively reduce pulmonary artery resistance and increase cardiac output. This article aims to investigate the effect of vasodilators on pulmonary hypertension secondary to chronic lung disease. The authors studied patients with pulmonary heart disease who were given hydralazine for rest