title: Operative risk factors associated with unstable angina pectoris.
abstract: We performed a prospective study in 207 patients with unstable angina pectoris (UA) to identify factors associated with operative mortality (OM) and perioperative myocardial infarction (MI) from myocardial revascularization. The OM was 3.9% (8/207) and the incidence of MI was 11% (23/207). Clinical variables (age, prior MI, electrocardiographic evidence, symptoms, left ventricular function) and operative variables (incomplete revascularization, cardiopulmonary bypass time, cross-clamp time) did not correlate with OM or MI. Operative mortality was associated with critical triple-vessel disease, but not left main coronary artery disease, and accounted for seven of the eight deaths (P less than .01). Myocardial infarction was associated with elective surgery (22/167) as opposed to urgent surgery (1/40) (P less than .01). Therefore, patients with critical triple-vessel disease are the highest risk group for OM, and urgent operation seems to reduce the incidence of MI in patients with UA.
mesh_terms: D000368:Aged; D000787:Angina Pectoris / Q000601:surgery*; D000789:Angina, Unstable / Q000473:pathology / Q000601:surgery*; D001026:Coronary Artery Bypass / Q000009:adverse effects* / Q000401:mortality; D004630:Emergencies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology* / Q000401:mortality; D011183:Postoperative Complications; D011446:Prospective Studies; D012306:Risk