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About the Nuclear Cardiology Lab

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The Dr. Robert Burns Nuclear Cardiology Lab has two locations within the UHN.​ ​All outpatients are seen at Toronto Western Hospital.​

​​​​​​​​​​Toronto Western Hospital | map iconMaps & Directions
East Wing - 5th Floor, Room 403 at the Dr. Robert Burns Nuclear Cardiology Lab

​​​​​​​​​​Toronto General Hospital | map iconMaps & Directions
Gerrard Building - 1st Floor, R​oom 525 at the Dr. Robert Burns Nuclear Cardiology Lab.
​Clinic Directions​

Hours & Contact

​Toronto General Hospital
Monday – Friday
7:45 am – 4:15 pm

Phone: 416 340 4800 ext. 5966
Fax: 416 603 6756

Toronto Western Hospital
Monday – Friday
7:45 am – 4:15 pm

Phone: ​​416 603 5658
Fax: 416 603 6756​

What We Do

​​​We're a diagnostic clinic that examines the changing states of your heart and your blood flow. Our procedures involve injecting a small amount of radioactive ​material that will allow doctors to see how the heart contracts and dilates and how the blood flows, both when you're under stress and are at rest. 

Using radioactive tracers, we are able to see how the heart is working, not just how it looks. Our scans are three-dimensional pictures of a moving, beating heart that can be observed at many different angles and views. This is a non-invasive diagnostic tool which allows your doctor insight into your heart health. ​


Patients are most often referred to us because they experience chest pain or are at risk because of their family history or smoking, diabetes, high blood pressure and high cholesterol.

You might also be referred to us to check for coronary artery disease and to check how a heart procedure such as angioplasty or bypass surgery has improved your health.  We might also check to see if your heart is healthy enough for surgery, to determine the effects of chemotherapy on your heart and to find out how well your heart is pumping.  Our tests include:

Pharmacological and exercise stress testing, using radioactive tracers:


​The following slideshow shows the steps involved in having anPDF icon imageexercise myocar​dial perfusion scan.​​

 Health Information

​The Patient & Family Education Program at UHN offers valuable resources to help you understand your condition.​

Visit our health information section.​​​​​