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May 8, 2019Artificial Organs

Experimental investigation of the flow downstream of a dysfunctional bileaflet mechanical aortic valve

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Why the study?

Thrombus and pannus formations commonly cause bileaflet mechanical heart valve leaflet dysfunction, a life-threatening complication whose induced downstream aortic flow disturbances and detection methods required investigation.

Can analysis of normalized axial velocity profiles detect and differentiate configurations of bileaflet mechanical heart valve dysfunction in an experimental model?

Population

Experimental model of the ascending aorta with a bileaflet mechanical heart valve

Comparison

Several configurations of leaflet dysfunction vs normal valve function

Design

Experimental in vitro study using time-resolved planar particle image velocimetry

Authors

ADAhmed DarwishGLGiuseppe Di LabbioWSWael Saleh

Discussion

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Overview

Normalized axial velocity analysis may enable noninvasive detection of mechanical valve dysfunction; leaves open clinical translation from this animal model.

Structured PICO

Can analysis of normalized axial velocity profiles detect and differentiate configurations of bileaflet mechanical heart valve dysfunction in an experimental model?

P
Population
Experimental model of a dysfunctional bileaflet mechanical heart valve in the ascending aorta
I
Intervention
Several configurations of leaflet dysfunction
C
Comparator
Normal bileaflet mechanical heart valve
O
Outcome
Flow characteristics in the ascending aorta (velocity fields, viscous energy dissipation, wall shear stress, and accumulation of viscous shear stresses)surrogate

Analysis of normalized axial velocity profiles in the ascending aorta can detect and differentiate configurations of bileaflet mechanical heart valve dysfunction in an experimental model, suggesting a potential approach using phase-contrast MRI.

Cite This Study

Darwish et al. (2019) studied this question.

synapsesocial.com/papers/6a855d1a7fcf0fdb395e1ad3https://doi.org/10.1111/aor.13483
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Adverse Hemodynamic Conditions Associated with Mechanical Heart Valve Leaflet Immobility2018 · 25 citations
  2. 2Vorticity dynamics of a bileaflet mechanical heart valve in an axisymmetric aorta2007 · 181 citations
  3. 3Dysfunction of mechanical heart valve prosthesis: experience with surgical management in 48 patients.2015 · 37 citations
  4. 4Artificial aortic valve dysfunction due to pannus and thrombus – different methods of cardiac surgical management2015 · 4 citations