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慢性主动脉瓣关闭不全(简称慢性主闭)患者,虽然静息时左心室喷血分数多为正常,但常在运动时呈异常反应。由于慢性主闭时心脏负荷状态有明显改变,故对运动时左心室功能异常反应的机理难以确定。本文目的旨在用门电路心血池造影法研究慢性主闭患者心肌收缩性与左心室功能的关系。方法:14例无临床症状的慢性主闭患者(男性13例,女性1例,平均年龄36岁)和6例正常人(男性5例,女性1例,平均年龄44岁)均进行静息时和握拳及卧位脚踏车运动时左心室功能测定(包括左心室喷血分数,舒张末期和收缩末期容量)。休息一小时后,各例受试者均给予静脉滴注血管紧张素Ⅱ,
Patients with chronic aortic regurgitation (referred to as chronic main closure), although the left ventricular ejection fraction at rest more than normal, but often showed abnormal reaction during exercise. Because of chronic heart failure when the main load state has changed significantly, so the movement of left ventricular dysfunction mechanism is difficult to determine. The purpose of this paper is to study the relationship between myocardial contractility and left ventricular function in patients with chronic obstructive pulmonary disease using portal circuit cardioplegia. Methods: Fourteen patients without clinical symptoms (13 males, 1 females, mean age 36 years) and 6 normal subjects (5 males and 1 females, mean age 44 years) were enrolled in the study. Left ventricular function test (including left ventricular ejection fraction, end-diastolic and end-systolic volume) during clenching and lying exercise. After an hour of rest, subjects were given intravenous infusion of angiotensin II,