原发性高血压的发病,一般均经过下列4个阶段:第一阶段,年龄可从10~30岁开始,血压逐渐升高,称为高血压前期(prehypertension)。现有不少研究证实,在“高血压前期”已有自主交感迷走神经调节功能(autonomic sympathovagal modulation)的异常[1],其特点是交感神经张力增高,心搏出量增加。美国将此阶段的血压定义为:收缩压120~139和(或)舒张压80~89mm Hg(1mm Hg=0.133kPa),欧洲和我国 The incidence of essential hypertension, generally after the following four stages: The first stage, age from 10 to 30 years old, the blood pressure gradually increased, known as prehypertension. There are many studies have confirmed that in the “prehypertension” has autonomic sympathovagal modulation dysfunction [1], which is characterized by increased sympathetic tone, increased cardiac output. The United States at this stage of blood pressure is defined as: systolic blood pressure 120 ~ 139 and (or) diastolic blood pressure 80 ~ 89mm Hg (1mm Hg = 0.133kPa), Europe and China