LAKE CHAMPLAIN CARDIOLOGY ASSOCIATES, LLP

CARDIAC NUCLEAR IMAGING

Before Your Test

Knowing what to expect can help you stay relaxed. Although you will exercise for just a short while, the entire test will take a few hours. For best results, prepare for your test as directed.

• When you schedule the test, be sure to mention all the medications you take. Ask if you should stop taking any of them the day of the test.

• Before your test, avoid caffeine, even decaf coffee and tea, for at least 48 hours.

• Don't eat or drink for 4 to 6 hours before the test. Sips of water are okay.

• On the day of the test, dress for ease and comfort. Wear a two-piece outfit, top and bottoms. Be sure to wear walking shoes for the test.

During Your Test

You may be asked to change into a hospital gown for the test. At some point, scanning pictures will be taken while you rest. This may be done before you exercise. Or, you might have to return for resting scans later that day or the next. During the actual test:

• You will be attached to EKG and blood pressure monitors. An IV (intravenous) line will be started in your arm.

• You will exercise on a treadmill for a few minutes. This increases the rate of blood flow to your heart muscle.

• Speak up when you cannot exercise for even 1 more minute. At this point, the tracer is given to you through the IV.

• If you cannot exercise, special medications can be used to increase heart rate.

• After you have received the tracer, you will be positioned on the scanning bed.

A scanning camera takes pictures of blood flow through the heart muscle.

• You must lie very still for up to 30 minutes. During this time, a scanning camera will be taking pictures. The images will show where blood flows through your heart muscle.

Let the Technologist Know

• What medicines you take.

• If you have diabetes, knee or hip problems, arthritis, asthma, or chronic lung disease.

• If you have had a stroke or have vascular disease of the leg.

• If you are pregnant, think you might be, or are nursing.

Report Any Symptoms

Be sure to tell the doctor if you feel any of the following during the test:

Chest, arm, or jaw discomfort
Severe shortness of breath
Dizziness or lightheadedness
Leg cramps or pain

What Is Cardiac Nuclear Imaging?

Tracking Blood Flow Through Your Heart Muscle

Illustration of a normal scan. This shows the heart muscle is getting enough blood

Cardiac nuclear imaging is also called a perfusion scan. It's a way of checking blood flow through the muscle (or walls) of the heart. To do this, a tracer (a small amount of radioactive matter) is delivered into the bloodstream. Then a camera scans the tracer in the blood as it flows through the heart muscle. The tracer leaves your body within hours.

Illustration of an abnormal scan.The area within the circle shows heart muscle that is not getting enough blood. Your Test Results

Your doctor will discuss the test results with you during a future office visit. The test results help the doctor plan your treatment and any other tests that are needed.

After Your Test

Before going home, ask when you may eat. Also, find out when to resume taking any medications you were told to skip before the test. If youneed to return for resting scans, follow any instructions. Most people can go back to their normal routine as soon as all parts of the test are finished.