Coronary artery spasm.
D000788:Angina Pectoris, Variant / Q000503:physiopathology; D003329:Coronary Vasospasm / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy; D003645:Death, Sudden / Q000209:etiology; D006801:Humans; D009203:Myocardial Infarction / Q000209:etiology