原发性高血压(青～中年)患者颈动脉窦和主动脉弓区域的高压压力感受器的敏感性随着年龄的增长而降低,然而,心肺低压压力感受器的敏感性是否随年龄增长而降低,尚不清楚。本文通过递增下胶负压(LBNP)降低胸腔内容量,选择性激活心肺低压反射,比较中年和老年原发性高血压患者的激素和血流动力学反应。对象和方法:选择28例无并发症的轻～中型原发性高血压男性患者:中年组15例,年龄<55岁 However, the sensitivity of cardiorespiratory or pulmonary baroreceptor decreases with age, and the sensitivity of the baroreceptor in the carotid sinus and aortic arch region to essential hypertension (young to middle age) decreases with age Not clear. In this paper, LBNP was used to decrease the contents of the thorax and selectively activate cardiopulmonary hypobaric reflex to compare the hormonal and hemodynamic responses of middle-aged and elderly patients with essential hypertension. PARTICIPANTS AND METHODS: Twenty-eight male patients with mild to moderate essential hypertension without complications were selected: 15 middle-aged, aged <55 years old