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Acute haemodynamic effects of intravenous administration of trapidil in man
Insights
Trapidil significantly impacts coronary artery disease patients by reducing systemic and pulmonary pressures and vascular resistance. This medication also decreased end-diastolic volume and pressure, improving peripheral and pulmonary circulation.
Area of Science:
- Cardiology
- Pharmacology
- Hemodynamics
Background:
- Coronary artery disease (CAD) poses significant cardiovascular risks.
- Understanding the hemodynamic effects of novel therapeutic agents is crucial for managing CAD.
Purpose of the Study:
- To investigate the hemodynamic effects of trapidil in patients with coronary artery disease.
- To assess trapidil's impact on systemic and pulmonary circulation.
Main Methods:
- Six patients with coronary artery disease underwent right and left heart catheterization.
- Hemodynamic parameters were measured at rest and after intravenous trapidil (100 mg).
- Left ventricular angiography was performed pre- and post-trapidil administration.
Main Results:
- Trapidil administration led to increased heart rate.
- Significant reductions were observed in systemic systolic pressure, pulmonary artery pressure, and systemic/pulmonary vascular resistances.
- End-diastolic volume and end-diastolic pressure significantly decreased.
Conclusions:
- Trapidil demonstrates a notable effect on peripheral and pulmonary circulation in CAD patients.
- The drug's vasodilatory properties may benefit patients with coronary artery disease.
Abstract:
In 6 patients affected by coronary artery disease, undergoing right and left heart catheterization, under resting conditions and after intravenous injection of 100 mg trapidil, the following haemodynamic parameters were recorded: heart rate, cardiac output, right atrial pressure, pulmonary artery pressure, capillary wedge pressure, aortic and left ventricular pressure. Furthermore, left ventricular angiography was performed before and after trapidil administration and the end-diastolic and systolic images were digitized on a computer. After administration of trapidil, an increase of the heart rate, a significant decrease of the systemic systolic pressure and of the pulmonary artery pressure together with a reduction of the systemic and pulmonary vascular resistances were noticed. Even end-diastolic volume and end-diastolic pressure significantly decreased. The results point out a remarkable effect of trapidil on the peripheral and pulmonary circulation.