twenty-two patients with class ii or iii chf performed bicycle exercise to symptomatic maximum before and 90 minutes after random double-blind administration of oral hydralazine ( 100 mg ) and isosorbide dinitrate ( 40 mg ) ( 11 patients , group 1 ) or placebo ( 11 patients , group 2 ) .
C0018802
chf
C0020223
hydralazine