This test measures levels of the hormones aldosterone and renin in your blood.
Aldosterone and renin play important roles in the body. Aldosterone regulates your levels of potassium, sodium, and overall blood volume. High levels of aldosterone can result from a condition called primary aldosteronism (PA), which causes high blood pressure. PA can then lead to a variety of other health conditions.
A high level of aldosterone typically causes a dip in renin level. The aldosterone and renin test looks at the ratio between these two hormones to help your healthcare provider make a diagnosis.
This test is ordered if it is suspected that you have a high aldosterone level or PA. Besides high blood pressure, high aldosterone levels can damage your heart and vascular system as well as your brain and kidneys.