Indications for and results of surgery for preinfarction unstable angina and Prinzmetal's variant angina.
D000787:Angina Pectoris / Q000601:surgery*; D000788:Angina Pectoris, Variant / Q000601:surgery* / Q000628:therapy; D000789:Angina, Unstable / Q000601:surgery* / Q000628:therapy; D000800:Angioplasty, Balloon; D006328:Cardiac Catheterization; D002986:Clinical Trials as Topic; D006801:Humans