Morgan等选择舒张期血压在95～109毫米汞柱的高血压病人124名,按不同疗法分为四组(每组31人),观察其在2年当中的血压变化,以考察低盐疗法对高血压的疗效。A组不加治疗;B组给予低盐饮食,每天钠摄入量限制在70～100毫摩尔以下;C组口服氯噻嗪500毫克,每天二次;D组口服心得安480毫克,每天一次。 Morgan and other selected 124 patients with diastolic blood pressure in the 95 ~ 109 mmHg hypertensive patients, divided into four groups (31 in each group) according to different therapies to observe its changes in blood pressure in 2 years to investigate the effect of low salt therapy Efficacy of hypertension. A group without treatment; B group given low-salt diet, daily sodium intake limit of 70 to 100 mmol; C group oral chlorothiazide 500 mg twice daily; D group oral propranolol 480 mg once a day .