The Aldosterone/Plasma Renin Direct Ratio (ARR) is a blood test that compares the levels of aldosterone, a hormone that helps regulate blood pressure and sodium balance, with direct renin concentration. It is primarily used to screen for primary aldosteronism, a condition in which the adrenal glands produce excessive aldosterone. The test is especially useful in evaluating individuals with difficult-to-control hypertension or unexplained low potassium levels.
Renin is an enzyme produced mainly by the kidneys that participates in regulating blood pressure and fluid balance through the renin-angiotensin-aldosterone system.
Aldosterone is a hormone produced by the adrenal glands. It helps regulate sodium, potassium, and fluid balance and plays an important role in maintaining blood pressure.
A high ratio may indicate that aldosterone production is disproportionately high compared with renin. It can suggest primary aldosteronism but does not confirm the diagnosis by itself.
No. The ratio is a screening test. An elevated result generally requires confirmation with additional testing and clinical evaluation before primary aldosteronism can be diagnosed.
Yes. Low potassium can suppress aldosterone production and potentially affect the test. Potassium levels may therefore need to be corrected before testing, according to medical advice.
OTP sent to your mobile number on whatsapp
Didn't recieved OTP Yet? Resend OTP
