Key result
In 4 patient-specific models, coronary stenosis >50% caused a significant pressure drop, increased velocity, and increased wall shear stress with a post-stenosis recirculation zone.
Why the study?
The study aimed to investigate the effect of stenosis on hemodynamics using patient-specific left coronary artery reconstructions in suspected coronary artery disease.
Observational (n=4)
Patient-specific 3D computational simulations demonstrate significant pressure drops, increased velocity, and altered wall shear stress at coronary stenosis sites, providing insight into coronary physiology and stenosis progression.
Highlights hemodynamic changes in modeled stenoses; leaves open clinical validation before guiding practice.
BACKGROUND: The most common cause of coronary artery disease (CAD) is vascular damage with the cholesterol built-up and other materials on the inner arterial wall, known as atherosclerosis. OBJECTIVE: This paper aims to investigate the effect of stenosis on the hemodynamics in the four suspected coronary artery disease patients. Computer tomography (CT) data was acquired from patients of suspected coronary artery disease to reconstruct left coronary artery. METHODS: The 3D computational simulation was carried out with four patient-specific models with area stenosis >50% located at the left anterior descending (LAD) and left circumflex (LCX) branches. RESULTS: The pressure, velocity and wall shear stress were calculated during the cardiac cycle. A significant pressure drop across the stenosis and increase in the velocity at the stenosis were observed at LAD and LCX branches. An increase in the wall shear stress in the region of stenosis also observed with the prevalence of the recirculation zone at the post stenosis region which results in the formation of stenosis. CONCLUSIONS: Our analysis provides an insight into the progression of stenosis and wall rupture, thus improving our understanding the flow behavior patient-specific realistic artery models.
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Kamangar et al. (2019) conducted an observational in Coronary artery disease (n=4). Coronary artery stenosis >50% was evaluated on Hemodynamics (pressure, velocity, and wall shear stress). In 4 patient-specific models, coronary stenosis >50% caused a significant pressure drop, increased velocity, and increased wall shear stress with a post-stenosis recirculation zone.
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