title: Left main coronary artery ostial stenosis: clinical markers, angiographic recognition and distinction from left main disease.
mesh_terms: D000328:Adult; D000368:Aged; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D004562:Electrocardiography; D005080:Exercise Test; D006439:Hemodynamics; D006801:Humans; D008875:Middle Aged; D005996:Nitroglycerin / Q000627:therapeutic use; D011859:Radiography; D013035:Spasm / Q000517:prevention & control
chemical_list: D005996:Nitroglycerin