Related Experiment Videos
[Relationship between right ventricular ejection fraction and pulmonary pressure in man]
Y Juillière1, J Anconina, P Buffet
1Cardiologie A et B, CHU Nancy-Brabois, Vandoeuvre-lès-Nancy.
Archives Des Maladies Du Coeur Et Des Vaisseaux
|September 1, 1992
Summary
This study found that increased pulmonary artery pressure negatively impacts right ventricular ejection fraction in patients with coronary artery disease and dilated cardiomyopathy. These findings highlight the crucial relationship between afterload and right ventricular function.
Area of Science:
- Cardiology
- Physiology
Context:
- Assesses right ventricular ejection fraction (RVEF) changes in response to altered right ventricular afterload.
- Utilizes a novel thermodilution catheter system for instantaneous RVEF measurements.
Purpose:
- To investigate the relationship between right ventricular afterload and RVEF in distinct patient cohorts.
- To evaluate RVEF response to acute increases and decreases in afterload.
Summary:
- In patients with single-vessel coronary artery disease and normal left ventricular ejection fraction, acute coronary occlusion (increasing afterload) was studied.
- In patients with dilated primary cardiomyopathy and reduced left ventricular ejection fraction, intravenous trinitrin (decreasing afterload) was administered.
- Significant negative linear correlations were observed between RVEF and mean pulmonary artery pressure under basal and altered afterload conditions (r = -0.72 to -0.82; p < 0.005).
Impact:
- Demonstrates a strong inverse relationship between pulmonary artery pressure and RVEF.
- Provides insights into right ventricular adaptation to afterload variations in cardiovascular disease.
- Highlights the clinical relevance of monitoring RVEF in conditions affecting pulmonary hemodynamics.