Hypertension - developinganaesthesia

Patients should have a fasting morning plasma renin activity test along with a serum aldosterone to help determine the cause of their hypertension if it is not known. If they are taking an ACEI, ARB, or beta-blocker, they must first be switched to a different drug class (preferably reserpine or a CCB) for 6 wk before a valid test can be determined. ................
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