Peer-reviewed veterinary case report
Modeling blood damage from mitral valve leaks in the heart
By Truchel K et al.·2025·Faculty of Chemical and Process Engineering·View original on Europe PMC →
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Original publication title: Numerical validation of the applicability of the simplified ventricular model in the analysis of hemolysis in the mitral paravalvular leak.
Plain-English summary
This study looked at how blood flow changes during heart contractions when there is a leak around the mitral valve, which is a common heart issue. Researchers created a detailed computer model of the heart using imaging data to see how blood moves and to test different ways of simplifying the model for easier use. They found that using simpler models still gave similar results regarding the risk of hemolysis (destruction of red blood cells) caused by high blood flow stresses. This means that doctors might not need to rely on detailed imaging for every patient, which could save time and make it easier to diagnose heart problems. Overall, the findings suggest that simpler models can be effective for routine heart assessments.
Abstract
In this paper, we explore various approaches to model the hemodynamic changes during cardiac contraction in the presence of a mitral paravalvular leak. Using computational fluid dynamics and large deformation diffeomorphic metric mapping, we conducted simulations that represented ventricular motion in four distinct ways. Taking tomography data into account, we developed a heart model that accurately reproduced the actual heart structure. Two simplifications for ventricular geometry to streamline the modeling process were proposed: a static mesh and a universal geometry. The simulation results from the most intricate variant, the CT-based, real model with dynamic mesh, were compared with the outcomes from the simplified approaches, universal geometry and static mesh. The simulations described unsteady flow dynamics during contraction, using a non-Newtonian Carreau-Yasuda blood rheological model. As expected, the hemodynamic conditions and parameter values derived from the hemolysis criterion (shear stresses exceeding 300 Pa) demonstrated no significant discrepancies between the various models under scrutiny. This suggests that the analysis of this phenomenon can be simplified to employ a static and universal ventricular mesh, eliminating the necessity for patient-specific medical imaging of the ventricle. Such a simplification can significantly reduce preprocessing and computational time, making this model more practical for routine medical diagnostics.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41602462