Plasma Aldosterone-to-renin ratio (measured by immunoassay)

Why This Test Is Done

Your doctor may order this test if you have symptoms of high blood pressure (hypertension) that don’t respond to usual treatments, unexplained low potassium levels, or signs of kidney issues. It’s also used to evaluate conditions like primary aldosteroneism (Conn’s syndrome) or certain types of kidney disease.

How the Test Works

A blood sample is taken to measure both aldosterone and renin levels. The ratio helps determine if your kidneys are producing too much aldosterone relative to renin, which can indicate an overactive adrenal gland or kidney dysfunction.

What to Expect Before the Test

No special preparation is needed, but you may be asked to avoid certain medications or foods that could affect results (like salt or certain blood pressure drugs). Follow your doctor’s instructions carefully.

Possible Results and Next Steps

High ratios may suggest conditions like primary aldosteroneism, while low ratios could indicate kidney problems or other hormonal imbalances. Your doctor will discuss results and recommend further testing or treatments based on your symptoms and overall health.