.

Keeping this in consideration, can a stress test show a blockage?

A normal stress test result only shows that there is not a significant coronary artery blockage. For example, a nuclear stress test may be inaccurate if someone has severe blockages in all three main coronary arteries. The test looks for differences in blood flow between areas of the heart.

Also, how many minutes is good on a stress test? A stress test will last no more than 15 minutes. The doctor needs to work the heart harder than normal for 8 to 12 minutes.

Herein, what does a positive stress test mean?

A positive exercise test result is a better predictor of the subsequent development of angina than the occurrence of a major event is. Even when subsequent angina is considered an event, a minority of patients with a positive test result experience cardiac events.

Can a stress test show a previous heart attack?

Stress tests can detect when arteries have 70 percent or more blockage. This severe narrowing is what causes the severe chest pain called angina. But normal results from a stress test do not rule out the possibility of a future heart attack. This is because a plaque can still rupture, form clots and block an artery.