[Unstable angina].
D000787:Angina Pectoris / Q000503:physiopathology*; D000789:Angina, Unstable / Q000503:physiopathology* / Q000628:therapy; D003329:Coronary Vasospasm / Q000150:complications; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D011379:Prognosis; D013997:Time Factors