Letter: Cardiac failure.
D006333:Heart Failure / Q000188:drug therapy*; D006801:Humans; D007548:Isosorbide Dinitrate / Q000627:therapeutic use; D009573:Nitrites / Q000627:therapeutic use; D005996:Nitroglycerin / Q000627:therapeutic use
D009573:Nitrites; D005996:Nitroglycerin; D007548:Isosorbide Dinitrate