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An Isolated Working Heart System for Large Animal Models
Published on: June 11, 2014
Comparison between left and right heart function in the isolated biventricular working rat heart
Gerhard Müller-Strahl1, Jan Hemker, Heinz-Gerd Zimmer
1Institut für Geschichte der Medizin, Ruhr-Universität Bochum, Bochum and.
Experimental and Clinical Cardiology
|August 1, 2009
Summary
This study characterizes the isolated rat heart model, finding partial similarities in left (LV) and right (RV) ventricle function. A new concept unifies RV and LV relaxation data, suggesting a link to cellular calcium handling.
Area of Science:
- Cardiovascular physiology
- Cardiac mechanics
- Isolated organ perfusion models
Background:
- The isolated perfused heart model is crucial for studying cardiac function.
- Understanding biventricular mechanics is essential for comprehending overall cardiac performance.
Purpose of the Study:
- To characterize the crystalline perfused isolated rat heart in a biventricular working mode.
- To compare the functional parameters of the left ventricle (LV) and right ventricle (RV) under various loading conditions.
Main Methods:
- Utilized 110 isolated biventricular rat heart preparations.
- Applied 24 and 28 distinct loading conditions to the LV and RV, respectively.
- Measured flows and intraventricular pressures to assess ventricular function.
Main Results:
- LV and RV flows demonstrated analogous responses to loading, adhering to the Frank-Starling principle.
- Ventricular function was quantitatively similar when unloaded but diverged under loading.
- Relaxation data provided a unifying concept for both LV and RV function, potentially linked to cellular calcium handling.
Conclusions:
- Common functional parameters between LV and RV in the isolated rat heart model show only partial similarity.
- A proposed functional interdependence of relaxation data offers a unifying description for both LV and RV function.
