This paper presented the levels of plasma renin activity(PRA) and angiotensin Ⅱ(ATⅡ)in 70 cases of normals and 128 cases of essential hypertension(EH). The results showed that normal plasma PRA(70 cases) and ATⅡ (40 cases) were 0.432±0.236 μg/(L·h)
and 31.7±7.4 ng/L respectively.In 128 cases of EH plasma PRA increased
normal and decreased in 18.0%
71.8% and 10.2% of cases; while ATⅡ in 14%
64.2% and 14.9% respectively. It was concluded that grouping of EH by plasma.PRA and AT Ⅱlevel may provide a good indices for treatment.