Glyceryl trinitrate before coronary angiography.
D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging*; D003331:Coronary Vessels / Q000187:drug effects; D006801:Humans; D005996:Nitroglycerin / Q000494:pharmacology*; D014664:Vasodilation / Q000187:drug effects*
D005996:Nitroglycerin