What it means
In imaging, MRA is magnetic resonance angiography: an magnetic resonance imagingmag-NET-ik REZ-uh-nunts IM-uh-jingAn imaging test that uses a strong magnet and radio waves to make detailed pictures of the inside of the body.Full entry scan that shows the blood vessels, often with an injected contrast agent. In pharmacology, MRA means a mineralocorticoid receptor antagonist, a drug such as spironolactone that blocks the hormone aldosterone; these drugs are used in heart failure and some kinds of high blood pressure. The setting tells you which one is meant.
For the nurse
Before an MRA scan, screen for metal in the body as for any MRI and ask about kidney function and allergies if contrast is planned. For MRA drugs, check the potassium level, since they can raise it.
Related terms
hyperkalemia
A blood potassium level above normal, over 5.0 mEq/L.
magnetic resonance imaging
An imaging test that uses a strong magnet and radio waves to make detailed pictures of the inside of the body.