Coronary artery stenosis (>50%) under hyperemic conditions resulted in a recirculation zone, highest wall shear stress across the stenosis, and decreased downstream pressure versus healthy arteries.
How does stenosis influence hemodynamic parameters (velocity, wall shear stress, pressure drop) under hyperemic flow in 3D coronary artery models?
Computational fluid dynamics demonstrates that coronary stenosis >50% significantly alters local hemodynamics under hyperemic conditions, increasing wall shear stress and causing downstream pressure drops.
The current study investigates the hyperemic flow effects on heamodynamics parameters such as velocity, wall shear stress in 3D coronary artery models with and without stenosis. The hyperemic flow is used to evaluate the functional significance of stenosis in the current era. Patients CT scan data of having healthy and coronary artery disease was chosen for the reconstruction of 3D coronary artery models. The diseased 3D models of coronary artery shows a narrowing of >50% lumen area. Computational fluid dynamics was performed to simulate the hyperemic flow condition. The results showed that the recirculation zone was observed immediate to the stenosis and highest wall shear stress was observed across the stenosis. The decrease in pressure was found downstream to the stenosis as compared to the coronary artery without stenosis. Our analysis provides an insight into the distribution of wall shear stress and pressure drop, thus improving our understanding of hyperemic flow effect under both conditions.
Kamangar et al. (Fri,) conducted a other in Coronary artery disease. Coronary artery stenosis (>50% lumen area) vs. Coronary artery without stenosis was evaluated on Hemodynamic parameters (velocity, wall shear stress, pressure drop). Coronary artery stenosis (>50%) under hyperemic conditions resulted in a recirculation zone, highest wall shear stress across the stenosis, and decreased downstream pressure versus healthy arteries.