If stress thallium test showed that i was normal, what are my chances of getting a heart attack?

A normal stress thallium indicates a low like hood of severe coronary artery narrowing and is thus a predictor of a good outlook over the next 5 years. However a plaque with a 30 per cent narrowing could rupture and the ensuing clot could cause a coronary occlusion resulting in a heart attack. The chances of this are lower in a person without severe disease. But no test is perfect.

Check with your doc: Depends your risk factors such as smoking, cholesterol, blood pressure, family history, glucose levels and sleep apnea.