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Related Experiment Video

Updated: May 14, 2026

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
09:20

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Published on: February 13, 2021

Fluid structure interaction simulation of left ventricular flow dynamics under left ventricular assist device

C W Ong1, B T Chan, E Lim

  • 1Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
Summary

Left ventricular assist device (LVAD) cannula placement impacts blood flow and vortex dynamics. Deeper insertion may reduce thrombus risk, while simulated suction causes significant left ventricular wall displacement near the cannula.

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Computational Modeling

Background:

  • Mechanical circulatory support with left ventricular assist devices (LVADs) is critical for end-stage heart failure.
  • LVAD malfunction and cannula malposition pose life-threatening risks to patients.
  • Understanding intraventricular flow patterns and pressure is crucial for LVAD optimization.

Purpose of the Study:

  • To investigate the impact of LVAD cannula placement on left ventricular (LV) vortex dynamics.
  • To simulate and analyze suction events within the LV during LVAD operation.
  • To characterize fluid-structure interactions within the LV under simulated LVAD conditions.

Main Methods:

  • Development of a 2D axisymmetric fluid-structure interaction (FSI) model of the passive left ventricle.
  • Incorporation of an LVAD cannula into the FSI model to simulate varying insertion depths.
  • Simulation of LVAD operation, including normal flow and simulated suction events (inlet closure).

Main Results:

  • Increasing cannula insertion depth led to larger recirculation areas at the cannula tip, potentially reducing thrombus formation.
  • Simulated suction events significantly altered vortex patterns within the LV.
  • The greatest LV wall displacement occurred closest to the cannula tip during suction events.

Conclusions:

  • LVAD cannula placement significantly influences intraventricular hemodynamics and vortex dynamics.
  • The study provides insights into mitigating thrombus formation through optimal cannula positioning.
  • The FSI model effectively simulates adverse events like LV suction, aiding in the design and management of LVAD therapy.