Meccanica

, Volume 52, Issue 3, pp 563–576

Clinical assessment of intraventricular blood transport in patients undergoing cardiac resynchronization therapy

  • Lorenzo Rossini
  • Pablo Martinez-Legazpi
  • Yolanda Benito
  • Candelas Pérez del Villar
  • Ana Gonzalez-Mansilla
  • Alicia Barrio
  • María-Guadalupe Borja
  • Raquel Yotti
  • Andrew M. Kahn
  • Shawn C. Shadden
  • Francisco Fernández-Avilés
  • Javier Bermejo
  • Juan C. del Álamo
Advances in Biomechanics: from foundations to applications

DOI: 10.1007/s11012-015-0322-x

Cite this article as:
Rossini, L., Martinez-Legazpi, P., Benito, Y. et al. Meccanica (2017) 52: 563. doi:10.1007/s11012-015-0322-x

Abstract

In the healthy heart, left ventricular (LV) filling generates different flow patterns which have been proposed to optimize blood transport by coupling diastole and systole. This work presents a novel image-based method to assess how different flow patterns influence LV blood transport in patients undergoing cardiac resynchronization therapy (CRT). Our approach is based on solving the advection equation for a passive scalar field from time-resolved blood velocity fields. Imposing time-varying inflow boundary conditions for the scalar field provides a straightforward method to distinctly track the transport of blood entering the LV in the different filling waves of a given cardiac cycle, as well as the transport barriers which couple filling and ejection. We applied this method to analyze flow transport in a group of patients with implanted CRT devices and a group of healthy volunteers. Velocity fields were obtained using echocardiographic color Doppler velocimetry, which provides two-dimensional time-resolved flow maps in the apical long axis three-chamber view of the LV. In the patients under CRT, the device programming was varied to analyze flow transport under different values of the atrioventricular conduction delay, and to model tachycardia (100 bpm). Using this method, we show how CRT influences the transit of blood inside the left ventricle, contributes to conserving kinetic energy, and favors the generation of hemodynamic forces that accelerate blood in the direction of the LV outflow tract. These novel aspects of ventricular function are clinically accessible by quantitative analysis of color-Doppler echocardiograms.

Keywords

Blood transport Intracardiac flow Intraventricular flow patterns Blood filling waves Cardiac resynchronization therapy Echocardiography 

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Lorenzo Rossini
    • 1
  • Pablo Martinez-Legazpi
    • 1
    • 2
  • Yolanda Benito
    • 2
  • Candelas Pérez del Villar
    • 2
  • Ana Gonzalez-Mansilla
    • 2
  • Alicia Barrio
    • 2
  • María-Guadalupe Borja
    • 1
  • Raquel Yotti
    • 2
  • Andrew M. Kahn
    • 3
  • Shawn C. Shadden
    • 4
  • Francisco Fernández-Avilés
    • 2
    • 5
  • Javier Bermejo
    • 2
    • 5
  • Juan C. del Álamo
    • 1
    • 6
  1. 1.Mechanical and Aerospace Engineering DepartmentUniversity of California San DiegoLa JollaUSA
  2. 2.Department of Cardiology, Instituto de Investigación Sanitaria Gregorio MarañónHospital General Universitario Gregorio MarañónMadridSpain
  3. 3.Department of MedicineUniversity of California San DiegoLa JollaUSA
  4. 4.Mechanical Engineering DepartmentUniversity of California BerkeleyBerkeleyUSA
  5. 5.Facultad de MedicinaUniversidad Complutense de MadridMadridSpain
  6. 6.Institute for Engineering in MedicineUniversity of California San DiegoLa JollaUSA

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