What Is MPS Test?

Myocardial perfusion scan is a medical test that uses a radioactive substance, known as a tracer, to assess the flow of blood to the heart muscle.

It produces images of the heart muscle during periods of exercise (or stress) and at rest.

How is MPS diagnosed?

To diagnose MPS I, a doctor will typically first do a urine test to look for abnormally high levels of glycosaminoglycans (GAGs). A urine test is only one of the first steps in diagnosing MPS I; definitive diagnosis requires a test to measure enzyme activity levels in the blood or skin cells.

What is MPS test in medical terms?

Myocardial perfusion imaging (MPI) is a non-invasive imaging test that shows how well blood flows through (perfuses) your heart muscle. It can show areas of the heart muscle that aren’t getting enough blood flow. This test is often called a nuclear stress test. It can also show how well the heart muscle is pumping.

What happens during a myocardial perfusion scan?

A myocardial perfusion scan uses a tiny amount of a radioactive substance, called a radioactive tracer. The tracer travels through the bloodstream and is absorbed by the healthy heart muscle. On the scan, the areas where tracer has been absorbed look different from the areas that do not absorb it.

Is a myocardial perfusion scan dangerous?

You will be exposed to some radiation during the test; however it is a small amount and is considered safe. There are usually no side effects or complications from a myocardial perfusion scan, and you can normally drive home afterwards.