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Energy cost minimization in left ventricular ejection: an optimal control model
Journal of Applied Physiology (Bethesda, Md. : 1985)
|November 1, 1986
Summary
This study introduces an optimization model for left ventricular ejection patterns, suggesting energy minimization controls this process. The model accurately predicts ejection patterns and parameter changes, supporting the energy cost minimization principle.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Computational Biology
Background:
- Left ventricular ejection patterns are crucial for cardiac function.
- Understanding the control mechanisms behind these patterns is essential for diagnosing and treating cardiovascular diseases.
Purpose of the Study:
- To develop a novel optimization model for explaining observed left ventricular ejection patterns.
- To investigate the principle of energy cost minimization in regulating ventricular ejection.
Main Methods:
- A system model incorporating a modified Windkessel load for arterial load was developed.
- Ventricular O2 consumption was minimized to predict ejection patterns for fixed cardiac output, stroke volume, and ejection duration.
Main Results:
- The model's predicted ejection patterns closely matched observed patterns.
- Model predictions for system parameter changes were qualitatively accurate.
- Results support the hypothesis that energy cost minimization governs ejection pattern control.
Conclusions:
- The proposed optimization model effectively explains left ventricular ejection patterns.
- Energy minimization appears to be a fundamental principle controlling cardiac ejection dynamics.