Surgical intervention for preinfarction angina.
D000787:Angina Pectoris / Q000503:physiopathology / Q000601:surgery* / Q000628:therapy; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D004562:Electrocardiography; D006439:Hemodynamics; D006801:Humans; D009203:Myocardial Infarction / Q000401:mortality / Q000517:prevention & control*; D014481:United States