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Myocardial Perfusion Imaging

Myocardial Perfusion Imaging: Diagnosis | National Heart Centre Singapore

Myocardial Perfusion Imaging - What it is

What is a Myocardial Perfusion Imaging (MPI)?

A MPI is a non-invasive test that allows us to assess the function and blood flow of your heart at stress and rest by injecting a radioactive tracer, followed by taking images of the heart using a gamma camera. The findings from this test will help the doctor to plan your future treatment route for your heart condition.

Preparations before the test

Please stop any medications as instructed by your doctor prior to the scan. Do remember to bring the medications along so that you can consume it after the test.

You may have a light meal before your appointment if you do not have any fasting blood tests scheduled on the same day. However, it is crucial that you do not drink or consume the following:
  • Caffeinated drinks such as coffee and all types of tea
  • Carbonated soft drinks
  • Other drinks like Milo, Horlicks and Ovaltine
  • Food and drinks containing chocolate
You may drink plain water for this test.

Please wear or bring along exercise attire for exercising on the treadmill. Patient lockers are available for use.

Test information

The reporting doctor will review the scan. Upon completion of one part of the test, the doctor will decide if a continual test is required and to be done on the same day or on a separate day. Please be informed that appointments which are scheduled in the afternoon and require a continual test, MPI can only be completed on a separate day.

Stress scan

  • This will take up to 3 hours, inclusive of waiting time.
Stress test will be performed either through exercising on the treadmill or lie down on a couch with a special medication injected if you are unable to exercise. After the stress test, you will need to wait for ½ hour to 2 hours before doing the scan.

Rest scan

  • This will take up to 3 hours, inclusive of waiting time.
Radioactive tracer will be injected for imaging purposes and the scan will be done about an hour after injection. Some patients may be required to wait for more than an hour to allow the tracer to completely perfuse (circulate through) the blood vessels of the heart.

Radiation safety

MPI requires the injection of radioactive tracer; patient is advised to refrain from having close contact with infants under the age of 1 year old and pregnant ladies for 24 hours after the test.

For mothers who are breastfeeding, please resume 24 hours after the test.

Is the test safe?

There is some radiation during the test however the amount is well within the accepted safety levels.

For stress test, your heart rate, blood pressure and electrocardiogram (ECG) will be monitored closely by a doctor during the test.

Can I undergo the MPI test if I am feeling unwell?

You will be examined by a doctor to ensure that you are fit to undergo the test. If you are having flu with fever, infectious disease such as sore eye or chicken pox, feeling lethargic or maybe pregnant, you should not undergo the test. Please contact us to reschedule the appointment.


You can use cash, NETS or any major credit cards to pay for your test.

Contact us

For any enquiries or rescheduling of appointment, please call (65) 6704 8181 between 8am to 5pm (Monday to Friday) or 8am to 12pm (Saturday).

Myocardial Perfusion Imaging - Symptoms

Myocardial Perfusion Imaging - How to prevent?

Myocardial Perfusion Imaging - Causes and Risk Factors

Myocardial Perfusion Imaging - Diagnosis

Myocardial Perfusion Imaging - Treatments

Myocardial Perfusion Imaging - Preparing for surgery

Myocardial Perfusion Imaging - Post-surgery care

Myocardial Perfusion Imaging - Other Information


The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth
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