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A coronary artery spasm is a tightening (contraction) of your heart’s arteries (coronary arteries). These spasms don’t usually last long, and you may not even notice them. But they can increase your risk of heart attack and other heart complications.

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A coronary artery spasm is a quick tightening of the blood vessels that deliver blood to your heart muscle. These spasms may cause chest pain, or you may not feel any symptoms. You often have coronary spasms late at night or early in the morning. Treatment focuses on relieving chest pain and preventing spasms.
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A coronary artery spasm is a sudden tightening of the arteries that send blood to your heart. The spasms are quick and may be painless, but they can increase your risk of a heart attack. Coronary artery spasms often happen in late-night or early-morning hours and may wake you up. Treatment focuses on relieving chest pain and preventing spasms.

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