sixty-one patients with moderate to severe congestive heart failure underwent simultaneous central and regional hemodynamic measurements before and after the intravenous or oral administration of one of a number of vasoactive agents including nitroglycerin , nitroprusside , isosorbide dinitrate , hydralazine , prazosin , clonidine , indoramin , and nifedipine .
C0018802
congestive heart failure
C0020223
hydralazine