Ask the doctor: What is Prinzmetal's angina?
Coronary artery spasms occur unpredictably, up to several times a day. Unlike typical angina, the symptoms do not always happen during or after physical activity. Diagnosis is tricky: the person has to take a drug to provoke a spasm and then undergo a coronary angiogram, an X-ray image of the heart's arteries. As a result, doctors often simply treat people whom they suspect have the condition with nitroglycerin and calcium-channel blockers—the same medications many people take for typical angina.
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