Why the study?
Continuous flow LVADs generate non-physiological blood flow that may cause neurological complications, prompting evaluation of altered cerebral and vertebrobasilar blood flow during support.
Does HeartMate 3 CF-LVAD support improve vertebrobasilar arterial blood flow, velocities, and wall shear stress parameters compared to unassisted heart failure with reduced ejection fraction in a 3D computational fluid dynamics model?
Does HeartMate 3 CF-LVAD support improve vertebrobasilar arterial blood flow, velocities, and wall shear stress parameters compared to unassisted heart failure with reduced ejection fraction in a 3D computational fluid dynamics model?
Computational fluid dynamics simulations demonstrate that HeartMate 3 CF-LVAD support restores average vertebrobasilar arterial blood flow rates, pressures, time-averaged wall shear stress, and relative residence times in HFrEF to levels comparable to healthy physiological conditions, despite dampening peak systolic blood velocities and shear stress variations.
Answers are grounded in this paper and cite their sources.
Supports LVAD hemodynamic modeling; leaves open clinical translation to patient cerebrovascular outcomes.
Continuous Flow Left Ventricular Assist Devices (CF-LVADs) are used to support the failing left ventricle in patients with end-stage heart failure. CF-LVADs unload the left ventricle continuously and generate non-physiological blood flow in the cardiovascular system, which may cause major complications, including neurological events such as haemorrhagic strokes. Therefore, quantifying the blood velocities and analysing altered blood flow in the cerebral circulation during CF-LVAD support will help to understand the effects of mechanical circulatory support on cerebral blood flow. The aim of this study is to evaluate blood flow in the vertebrobasilar arteries in a healthy condition and heart failure with reduced ejection fraction and during HeartMate 3 CF-LVAD support. Blood velocities and wall shear stresses in the vertebrobasilar arteries were evaluated using Computational Fluid Dynamics analyses for a healthy condition, heart failure with reduced ejection fraction and during HeartMate 3 support. Simulation results showed that time-averaged wall shear stress and relative residence time decrease in the vertebrobasilar arteries in heart failure. HeartMate 3 support provides comparable cerebral arterial average blood flow rates, pressures, time-averaged wall shear stresses and relative residence times to healthy conditions, although wall shear stresses and blood velocities are altered.
No takes yet. Share an insight, caveat, or question.
Selim Bozkurt (2025) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: