Key result
A real-time computed Windkessel model loading system increased mechanical work output in isolated rat cardiac trabeculae compared to a simplified isotonic work-loop protocol.
Why the study?
Mechanical loads imposed on isolated cardiac muscle tissue in vitro have been oversimplified and do not fully capture dynamic responses to variable loads experienced in vivo.
Population
Isolated rat left ventricular trabeculae
Comparison
Real-time computed Windkessel model-based loading vs typical simplified isotonic shortening work-loop system
Design
Controlled in vitro experimental study
Authors
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May enhance fidelity of isolated muscle mechanics studies; hypothesis-generating pending intact-heart validation.
A novel real-time Windkessel model-based loading system provides a more physiological load for isolated cardiac muscle, demonstrating greater mechanical work output than traditional isotonic systems.
Garrett et al. (2019) studied this question. Real-time computed Windkessel model loading system vs. Simplified isotonic shortening work-loop system was evaluated on Mechanical work output. A real-time computed Windkessel model loading system increased mechanical work output in isolated rat cardiac trabeculae compared to a simplified isotonic work-loop protocol.
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