Key result
RCA computational models show curvature changes affect blood flow more than torsion changes during contraction.
In a computational model of the right coronary artery, blood flow was more affected by changes in curvature than torsion during simulated cardiac contraction.
Curvature dynamics warrant priority in coronary flow models; leaves open translation to human hemodynamics or outcomes.
A computational fluid dynamics study was conducted using a simplified model of the right coronary artery, which deforms with contraction of the heart. The right coronary artery was modeled using an ordinary helix, whose torsion and curvature changed in time with the contraction and dilatation of the heart which was modeled as a cylinder. In the computational result, the flow in the model right coronary artery was thought to be more affected by the change of the curvature compared to that of the torsion.
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Hayashi et al. (2002) studied this question. Temporal change of curvature and torsion was evaluated on Blood flow. In a computational model of the right coronary artery, blood flow was more affected by the temporal change of curvature than by the change of torsion during heart contraction.
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