title: When "refractory" angina has an unsuspected cause.
mesh_terms: D000368:Aged; D000787:Angina Pectoris / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy / Q000601:surgery / Q000628:therapy; D000792:Angiography; D003327:Coronary Disease / Q000150:complications / Q000628:therapy; D005112:Extracorporeal Circulation; D005260:Female; D006333:Heart Failure / Q000150:complications; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D006973:Hypertension / Q000209:etiology; D007238:Infarction / Q000150:complications; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000627:therapeutic use; D009941:Organomercury Compounds / Q000627:therapeutic use; D013315:Stress, Psychological / Q000150:complications; D013927:Thrombosis / Q000150:complications
chemical_list: D006454:Hemoglobins; D009941:Organomercury Compounds; D005996:Nitroglycerin