title: Refractory angina pectoris.
mesh_terms: D000787:Angina Pectoris / Q000188:drug therapy* / Q000517:prevention & control; D004361:Drug Tolerance; D006801:Humans; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000627:therapeutic use; D011433:Propranolol / Q000627:therapeutic use
chemical_list: D011433:Propranolol; D005996:Nitroglycerin