Renin Assay

Plasma Renin Activity (PRA) Test

Why It Is Done

A renin test is done to find the cause of high blood pressure (hypertension), especially when potassium levels in the blood are low.

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Author:	Jan Nissl, RN, BS	Last Updated: September 15, 2006
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism
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