title: Medical versus surgical intervention and the natural history of severe angina pectoris.
mesh_terms: D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000188:drug therapy / Q000601:surgery / Q000628:therapy*; D005260:Female; D006801:Humans; D007548:Isosorbide Dinitrate / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D011433:Propranolol / Q000627:therapeutic use
chemical_list: D011433:Propranolol; D007548:Isosorbide Dinitrate