TITLE

Effect of Intravenous Nitroglycerin on Hemodynamics of Congestive Heart Failure

AUTHOR(S)
Pitt, William A.; Friedman, Richard G.; Gross, Sleven A.; Glassman, Jerrold; Keating, Hdward C.; Mazur, John H.
PUB. DATE
May 1982
SOURCE
Angiology;May1982, Vol. 33 Issue 5, p294
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Intravenous nitroglycerin (IV-NTG) has gained wide use in the management of critically ill patients. Yet little is known regarding dose-response hemodynamics in man. Therefore, we studied 10 patients, all Class III oral New York Heart Association Classification with pulmonary artery wedge pressures of 15 torr or greater. A special delivery system designed to prevent drug absorption Nitrostat� IV Infusion Kit was used and assessed. Multiple hemodynamic values were recorded before, during, and after the infusion. Administration of IV-NTG was started at 0.125 meg/kg/min. The infusion was stopped if the pulmonary artery wedge pressure dropped below 10 torr, or arterial pressure dropped below 90/60 torr, or if the mean artery pressure fell more than 10 torr, or if significant side effects occurred. Samples for blood levels were collected. Only one patients noted any untoward effects and he recovered quickly upon cessation of infusion. The mean infusion rate was 0.3125 meg/kg/min. A significant drop in mean arterial blood pressure, mean pulmonary artery pressure, mean pulmonary artery wedge pressure, heart rate, and arterial oxygenation was noted. Cardiac output did not change significantly. Pulmonary vascular resistance index, as well as several other indices, decreased significantly in all patients. Nitrostat IV*� appears to be very safe and to work by dilating preload capacitance vessels, followed by a drop in arterial pressure without an adverse lowering of cardiac output.
ACCESSION #
16406674

 

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