the effect of sublingually administered nitroglycerin ( 0.5 mg ) on distribution of blood volume in 16 patients with congestive heart failure ( nyha class ii and iii ) , randomly assigned to placebo ( n = 8 ) or nitroglycerin ( n = 8 ) was studied 20 minutes after in vivo labelling of red blood cells with 99m-tc pertechnetate .
C0018802
congestive heart failure
C0017887
nitroglycerin