Key result
Unloaded reference modeling predicts softer and less anisotropic LV myocardium than early-diastolic configurations.
Why the study?
Computational modeling of cardiac mechanical properties requires an accurate unloaded reference configuration, but the beating heart rarely reaches zero pressure in vivo, complicating model accuracy.
Population
5 in vivo porcine left ventricles
Comparison
Unloaded reference configuration vs early-diastolic filling reference configuration in computational modeling
Design
Preclinical computational modeling study using MRI and pressure catheterization data
Authors
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Reference configuration choice impacts model-derived myocardial properties; leaves open standardization for translational cardiac biomechanics.
The choice of reference configuration in computational modeling of the heart significantly impacts the predicted mechanical response, with unloaded configurations yielding softer and less anisotropic properties.
Nikou et al. (2016) studied In vivo porcine left ventricle (n=5). Unloaded reference configuration vs. Early-diastolic filling reference configuration was evaluated on Predicted material properties for LV myocardium (stiffness and anisotropy). Using an unloaded reference configuration predicted softer and less anisotropic material properties for the left ventricular myocardium compared to an early-diastolic filling reference configuration.
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