Objective:To investigate the relationship among essential hypertension, plasma renin activity (PRA) and angiotensinogen(AO).

目的：分析血浆肾素活性（PRA）、血浆血管紧张素原（AO）浓度与原发性高血压的关系。

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Objective To observe the changes of plasma renin activity (PRA)in cirrhotic patients with ascites after portacaval shunt.

目的探讨合并腹水的门静脉高压症患者门腔静脉分流术前后肾素活性（PRA）水平的变化。

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Plasma renin activity (PRA) is usually normal in patients with primary hypertension but is suppressed in about 25% and elevated in about 15%.

原发性高血压病人的血浆肾素活性（PRA）通常是正常的， 但约25%受抑制， 约15%也许升高。

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