Ruth Kam Heart & Arrhythmia Clinic
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Stress Perfusion Scan

Stress testing is used to detect the presence of coronary artery disease.
The patient is made to walk on a treadmill or pedal on a bicycle until he reaches at least 85% of his maximum predicted heart rate. When the exercise is stopped, an injection containing a radioactive substance is given. This radioactive substance is delivered by blood flowing through the arteries to the heart. If a vessel supplying blood to a particular part of the heart is blocked, less or none of this substance will reach that part of the heart. The patient is then scanned with a machine that detects the radioactive substance. Unequal distribution of the radioactive substance (perfusion defect) is indirect evidence that blockage is present in one or some of the arteries.
If the test is abnormal, a second scan is performed the next day to see if the perfusion defect is reversible. An irreversible defect indicates a scar or dead muscle is present. A reversible defect indicates that the muscle is alive but deprived of blood during exercise.
An abnormal test means that a coronary angiogram should be performed to confirm if blockage is present.

Opening Hours

Monday to Friday : 08:30 - 17:30 hours
Closed on Saturdays, Sundays and Public Holidays.

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Contact Info

Ruth Kam
Heart & Arrhythmia Clinic @ Farrer
1 Farrer Park Station Road, #07-11 Connexion
Farrer Park Medical Centre, Singapore 217562
Tel: 6443 0468 | Fax: 6443 0467
For Emergencies: 6535 8833