TITLE

Enhancement of Phentolamine by Nitrates in Patients with Congestive Heart Failure

AUTHOR(S)
Gould, Lawrence; Reddy, C. V. R.; Zen, Bujung; Singh, B. K.
PUB. DATE
September 1981
SOURCE
Angiology;Sep1981, Vol. 32 Issue 9, p595
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Phentolamine dilates the resistance bed and to a lesser degree the capacitance bed, while the nitrates have the opposite action. Therefore, in 7 patients with congestive heart failure due to congestive cardiomyopathy, hemodynamic measurements were made using a Swan Ganz thermodilution catheter and cardiac output computer. The patients received 5 mg of an IV infusion of phentolamine administered at 0.3 mg/minute. At the end of the infusion, the pressures and cardiac output were obtained. Then, 2½ inches of nitroglycerin ointment was applied to the chest, and the hemodynamic parameters were obtained 30 minutes later. Phentolamine produced a significant reduction in the right and left ventricular filling pressures and a significant increase in the cardiac output. The hemodynamic effects of phentolamine are known to persist for an hour or longer. The addition of nitroglycerin ointment led to a further reduction in the right and left ventricular filling pressures. Thus, the combination of phentolamine and nitrates can be effectively used in the treatment of congestive heart failure.
ACCESSION #
16395107

 

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