Key result
Modeling shows moderate stenosis at elevated heart rates reduces perfusion comparably to severe resting stenosis.
Why the study?
The temporal behavior of pressure in stenotic arteries is not well reported for realistic pulsatile flows.
How do stenosis severity and elevated heart rate affect coronary hemodynamics and myocardial oxygen balance in a computational model?
Population
Left coronary artery model
Comparison
Different degrees of stenotic severity and heart rates
Design
Computational investigation
Authors
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May warrant heart rate control in moderate stenosis; leaves open prospective human validation.
How do stenosis severity and elevated heart rate affect coronary hemodynamics and myocardial oxygen balance in a computational model?
Computational modeling suggests that the hemodynamic impact of moderate coronary stenosis during tachycardia is equivalent to severe stenosis at rest.
Kumar et al. (2024) studied Coronary artery stenosis. Varying stenosis severity and elevated heart rate vs. Resting heart rate / lower stenosis severity was evaluated on Coronary perfusion pressure (CPP) and endocardial viability ratio (EVR). Computational modeling demonstrated that moderate coronary stenosis at an elevated heart rate causes reductions in coronary perfusion pressure and endocardial viability ratio comparable to severe stenosis at rest.
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