Coronary vasospasm - Definition

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Coronary vasospasm is a type of spasm that occurs in the heart's blood vessels, notably in the coronary arteries. These spasms constrict the arteries, causing imperfect myocardial circulation that can induce symptoms such as angina pectoris. This last condition occurs when there is not enough oxygen in a certain area of the heart, and when coronary vasospasm is the cause, it is called variant angina, or coronary vessel spasm. This type of angina manifests as chest pain or discomfort that feels like it is constricted by something, localized in the region of the heart. Prinzmetal's angina is a sub-form characterized primarily by multiple violent and painful attacks that occur while at rest, usually in the second half of the night, sometimes making sufferers pass out from the pain. This condition can lead to cardiac rhythm disorders and must be investigated by electrocardiogram and angiogram.