A normal stress test can often provide reassurance that there are no severely narrowed segments in the heart’s arteries. But many people with normal stress tests may still have plaque buildup in the coronary arteries that is too small to show up on a stress test. This is known as non-obstructive coronary artery disease, and it can lead to heart attack or death, especially if there are many areas of plaque or multiple coronary arteries are affected. Recognizing and treating this condition with medicines and lifestyle changes can reduce heart attack risk.
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