Related Experiment Videos
[Applicability to exercise test of thermodilution technique for right ventricular ejection fraction]
1First Department of Internal Medicine, Kobe University School of Medicine.
Kokyu to Junkan. Respiration & Circulation
|April 1, 1993
Summary
The thermodilution technique reliably measures right ventricular ejection fraction (RVEF) during exercise in cardiac patients. Three measurements are sufficient for accurate RVEF assessment during exercise tests.
Area of Science:
- Cardiovascular physiology
- Diagnostic imaging techniques
- Hemodynamic monitoring
Context:
- Assessing right ventricular ejection fraction (RVEF) is crucial for managing cardiac disease.
- The thermodilution technique offers a potential method for measuring RVEF during exercise.
- Reliability of RVEF measurements during exercise needs validation.
Purpose:
- To evaluate the reliability of the thermodilution technique for measuring RVEF during exercise.
- To determine the optimal number of measurements for accurate RVEF assessment.
- To identify factors influencing RVEF measurements using a modified Swan-Ganz catheter.
Summary:
- Right ventricular ejection fraction (RVEF) was measured using thermodilution in 19 cardiac patients under various conditions.
- Injectate volume and breathing patterns did not affect RVEF or its variability.
- Postural changes decreased RVEF, while exercise increased it without affecting measurement variability; three measurements were sufficient for reliable exercise RVEF.
- Catheter tip position in the pulmonary artery influenced RVEF, and cardiac rhythm did not impact measurement variability.
Impact:
- The thermodilution technique is applicable for exercise testing in cardiac patients.
- Establishes that three measurements are adequate for determining average RVEF during exercise.
- Provides insights into optimizing RVEF measurement protocols during hemodynamic assessments.