In 10 percent of the patients with high blood pressure and around 20 percent of the patients with therapy resistant hypertonia, the underlying cause is primary hyper-aldosteronism (PHA). It can be detected by estimation of serum aldosterone and renin levels. The ratio helps to differentiate it from secondary hyper-aldosteronism. Furthermore, it’s important to rule out another differential causing sodium retention and hypertension:
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|568||ELISA||Plasma Renin Activity (PRA)|| antibody-coated