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Hemodynamic effects of prostacyclin in man
Advances in Prostaglandin and Thromboxane Research
|January 1, 1980
Summary
Prostacyclin infusion significantly reduced vascular resistance and blood pressure in healthy individuals. This finding suggests potential therapeutic applications for prostacyclin in managing conditions like heart failure and myocardial necrosis.
Area of Science:
- Cardiovascular Pharmacology
- Hemodynamics
- Vascular Physiology
Background:
- Prostacyclin is a potent vasodilator with potential cardiovascular effects.
- Understanding its impact on vascular resistance and cardiac function is crucial for therapeutic development.
Purpose of the Study:
- To investigate the hemodynamic effects of prostacyclin infusion in humans.
- To assess the impact of prostacyclin on peripheral, pulmonary, and cardiac pressures and outputs.
Main Methods:
- Intraarterial or intravenous infusion of prostacyclin at varying doses (2, 5, 10 ng/kg/min).
- Hemodynamic parameters monitored in 5 healthy subjects without cardiac disease.
- Measurements included blood pressure, heart rate, cardiac output, stroke volume, and various vascular resistances.
Main Results:
- Marked reduction in peripheral, total pulmonary, and capillary wedge resistances.
- Moderate decrease in intraarterial blood pressure with a compensatory increase in heart rate and cardiac output.
- Stroke volume and mean right atrial pressure remained unchanged; no adverse effects reported.
Conclusions:
- Prostacyclin primarily affects vascular resistance vessels.
- Hemodynamic effects suggest potential clinical utility in treating conditions with high vascular resistance and heart failure.
- Potential role in limiting infarct size during acute myocardial necrosis warrants further investigation.