Keyword search (3,448 papers available)


Energy loss associated with in-vitro modeling of mitral annular calcification.

Author(s): Wiener PC, Darwish A, Friend E, Kadem L, Pressman GS

INTRODUCTION: Study aims were to compare hemodynamics and viscous energy dissipation (VED) in 3D printed mitral valves-one replicating a normal valve and the other a valve with severe mitral annular calcification (MAC). Patients with severe MAC develop tran...

Article GUID: 33591991
Proper Orthogonal Decomposition Analysis of the Flow Downstream of a Dysfunctional Bileaflet Mechanical Aortic Valve.

Author(s): Darwish A, Di Labbio G, Saleh W, Kadem L

PURPOSE: Aortic valve replacement remains the only viable solution for symptomatic patients with severe aortic valve stenosis. Despite their improved design and long history of successful operation, bileaflet mechanical heart valves are still associated wit...

Article GUID: 33469847
Impact of Mitral Regurgitation on the Flow in a Model of a Left Ventricle.

Author(s): Papolla C, Darwish A, Kadem L, Rieu R

PURPOSE: Mitral regurgitation (MR) is the second most common valve disease in industrialized countries. Despite its high prevalence, little is known about its impact on the flow dynamics in the left ventricle (LV). Because of the interdependence between val...

Article GUID: 33000444
Color Doppler Splay: A Clue to the Presence of Significant Mitral Regurgitation.

Author(s): Wiener PC, Friend EJ, Bhargav R, Radhakrishnan K, Kadem L, Pressman GS

J Am Soc Echocardiogr. 2020 Jul 22;: Authors: Wiener PC, Friend EJ, Bhargav R, Radhakrishnan K, Kadem L, Pressman GS

Article GUID: 32712051
Effects of Hemodynamic Conditions and Valve Sizing on Leaflet Bending Stress in Self-Expanding Transcatheter Aortic Valve: An In-vitro Study.

Author(s): Stanová V, Zenses AS, Thollon L, Kadem L, Barragan P, Rieu R, Pibarot P

Artif Organs. 2020 Jan 29;: Authors: Stanová V, Zenses AS, Thollon L, Kadem L, Barragan P, Rieu R, Pibarot P

Article GUID: 31995230
Experimental Investigation of the Effect of Heart Rate On Flow in the Left Ventricle in Health and Disease -- Aortic Valve Regurgitation.

Author(s): Di Labbio G, Ben-Assa E, Kadem L

J Biomech Eng. 2019 Nov 01;: Authors: Di Labbio G, Ben-Assa E, Kadem L

Article GUID: 31701119
Jet collisions and vortex reversal in the human left ventricle.

Author(s): Di Labbio G, Kadem L

J Biomech. 2018 09 10;78:155-160 Authors: Di Labbio G, Kadem L

Article GUID: 30049450
Response to letter to the editor: 'Left ventricular flow in the presence of aortic regurgitation'.

Author(s): Di Labbio G, Kadem L

J Biomech. 2019 Apr 18;87:212-214 Authors: Di Labbio G, Kadem L PMID: 30871721 [PubMed - in process]

Article GUID: 30871721
Experimental investigation of the flow downstream of a dysfunctional bileaflet mechanical aortic valve.

Author(s): Darwish A, Di Labbio G, Saleh W, Smadi O, Kadem L

Artif Organs. 2019 May 08;: Authors: Darwish A, Di Labbio G, Saleh W, Smadi O, Kadem L

Article GUID: 31066923
Title:Jet collisions and vortex reversal in the human left ventricle.
Authors:Di Labbio G,  Kadem L
Link:https://www.ncbi.nlm.nih.gov/pubmed/30049450?dopt=Abstract
Category:J Biomech
PMID:30049450
Dept Affiliation: ENCS
1 Laboratory of Cardiovascular Fluid Dynamics (LCFD), Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, Québec, Canada. Electronic address: g_dilabb@encs.concordia.ca.
2 Laboratory of Cardiovascular Fluid Dynamics (LCFD), Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, Québec, Canada.

Description:

Jet collisions and vortex reversal in the human left ventricle.

J Biomech. 2018 09 10;78:155-160

Authors: Di Labbio G, Kadem L

Abstract

Unnatural dynamics of the notorious vortex in the left ventricle is often associated with cardiac disease. Understanding how different cardiac diseases alter the flow physics in the left ventricle may therefore provide a powerful tool for disease detection. In this work, the fluid dynamics in the left ventricle subject to different severities of aortic regurgitation is experimentally investigated by performing time-resolved particle image velocimetry in a left heart duplicator. Diastolic vortex reversal was observed in the left ventricle accompanied by an increase in viscous energy dissipation. Vortex dynamics and energy dissipation may provide useful insights on sub-optimal flow patterns in the left ventricle.

PMID: 30049450 [PubMed - indexed for MEDLINE]