If you’ve been scheduled for a heart perfusion test (sometimes called a myocardial perfusion scan), feeling a little nervous is normal. But with a bit of preparation, you can help make the day go as smoothly as possible.
This test gives important information about how well blood flows through your heart muscle, especially when it’s working harder during stress. Here’s a simple guide to what you should eat, wear, and expect to feel during the test.
What You Can and Cannot Eat Before the Test
One of the key instructions you’ll likely receive is no caffeine before your heart perfusion scan, even if it’s just a small amount.
Here’s why and what you need to know:
Avoid caffeine for at least 24 hours before the test. This includes coffee, tea (even decaffeinated versions), energy drinks, soft drinks like cola, and chocolate. Caffeine can interfere with the medication used during the stress part of the test and affect the results.
You may be asked not to eat or drink for a few hours before the scan, especially if a stress agent is used instead of exercise. Always check the specific instructions from your doctor.
Stick to water unless told otherwise. Some centres may allow light meals earlier in the day if your appointment is later, but heavy meals are usually discouraged.
Medications – Take your usual medications unless your doctor says otherwise. Some heart medications might need to be paused, so double-check.
Tip: Prepare meals ahead if you’re worried about missing your morning coffee or breakfast. Having something ready for after the scan can be a good idea too, you might be hungry!
What to Wear for Comfort and Ease
Comfort is key during your heart perfusion test, especially during the stress portion where you might be asked to walk on a treadmill.
Here’s what to wear:
Loose, comfortable clothing – Think of what you’d wear to exercise or relax at home.
Flat, sturdy shoes – Trainers or walking shoes are ideal.
Two-piece outfits – It’s easier for the technician to place ECG leads on your chest if you’re wearing a top and bottom rather than a dress or jumpsuit.
You might also be given a hospital gown for part of the test, but wearing suitable clothes underneath will still make you feel more comfortable.
What to Expect During the Stress Portion
Depending on your health and physical ability, the “stress” part of the test will involve either walking on a treadmill or receiving a medication that simulates exercise. Here’s what you might experience:
If you exercise: You’ll start at an easy pace and gradually increase speed and incline. You may feel a little breathless, sweaty, or tired, which is normal, it shows your heart is working.
If you have medication: You might feel flushed, lightheaded, or notice a warm feeling in your chest. Some people describe feeling like they’ve been exercising even though they’re resting. These sensations usually pass quickly once the medication wears off.
During and after the stress phase, a small amount of a safe radioactive tracer is injected into a vein. This allows the scanner to pick up clear images of blood flow in your heart muscle.
The scan itself is painless, but you’ll need to lie still for short periods while the camera takes images.
How Long Does It All Take?
A heart perfusion test is usually completed in one day, but it can take a few hours in total. Some parts involve waiting between the stress and rest phases to allow the tracer to circulate properly. Bringing a book or something to pass the time can help.
Taking Care of Yourself Afterwards
Drink plenty of fluids to help flush the tracer out of your system. Ease back into your routine – most people feel fine afterwards and can return to normal activities unless instructed otherwise. Follow any further instructions – your doctor will let you know when you can expect results and whether you need a follow-up appointment.
Have Questions About Your Heart Test?
Preparing properly can make your heart perfusion test much less stressful. If you have any concerns about your symptoms, heart health, or upcoming tests, Dr Paul Ong at Heart Specialist International is here to support you. Book a consultation with Dr Paul Ong today to discuss your heart health journey and get personalised advice to help you feel confident every step of the way.
