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Chest pain due to a coronary artery spasm, a suddenAngina, Prinzmetal: Chest pain due to a coronary artery spasm, a suddenconstriction of one of the vessels that supply the heartmuscle with blood rich in oxygen. This deprives the heart muscle of blood and oxygen. Coronary artery spasm can be triggered by emotional stress, medicines, street drugs (cocaine) orexposure to cold. Treatments include beta-blocker medications and, classically, nitroglycerin to open up the coronary arteries.Named for the American cardiologist, Myron Prinzmetal (1908-87).