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Previous Volume 293:1008-1012 November 13, 1975 Number 20 Next

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Abstract

Nitroglycerin reduces ischemic injury during acute myocardial infarction (AMI) in dogs--an effect that is potentiated when drug-induced hypotension and tachycardia are prevented with phenylephrine. To determine the effectiveness of nitroglycerin, alone or with phenylephrine, during AMI in man, 12 patients (five or whom had left heart failure) were evaluated by summing ST-segment abnormalities (sigmaST) from 35 precordial electrodes. The seven patients without heart failure did not benefit consistently from nitroglycerin alone; however, addition of phenylephrine to abolish nitroglycerin-induced arterial pressure reduction uniformly diminished sigmaST (4.9 to 3.2 mv; P less than 0.05). In patients with heart failure, nitroglycerin alone consistently reduced ischemia (5.8 to 4.4 mv, P less than 0.05); addition of phenylephrine often partially reversed this effect. Thus, administration of nitroglycerin, alone or with phenylephrine, can reduce myocardial ischemic injury during AMI in man; however, the response to phenylephrine depends on the presence or absence of left ventricular failure before treatment.

This article has been cited by other articles:

• Curling, P. E., Kaplan, J. A. (1982). Indications and Uses of Intravenous Nitroglycerin During Cardiac Surgery. ANGIOLOGY 33: 302-312  
• Cody, R. (1982). Use of Intravenous Nitroglycerin in the Coronary Care Unit. ANGIOLOGY 33: 313-318  
• Cecena-Seldner, F. A., Villarreal, J. (1980). Effect of the Kallikrein Inhibitor Aprotinin on Myocardial Ischemia and Necrosis in Man. ANGIOLOGY 31: 488-496 [Abstract]