Dynamic changes in microvascular flow conductivity and perfusion after myocardial infarction shown by image-based modeling

Gkontra, Polyxeni and El-Bouri, Wahbi K. and Norton, Kerri-Ann and Santos Lleo, Andres de and Popel, Aleksander S. and Payne, Stephen J. and Arroyo, Alicia G. (2019). Dynamic changes in microvascular flow conductivity and perfusion after myocardial infarction shown by image-based modeling. "Journal of the American Heart Association", v. 8 (n. 7); pp. 1-31. ISSN 2047-9980. https://doi.org/10.1161/JAHA.118.011058.

Description

Title: Dynamic changes in microvascular flow conductivity and perfusion after myocardial infarction shown by image-based modeling
Author/s:
  • Gkontra, Polyxeni
  • El-Bouri, Wahbi K.
  • Norton, Kerri-Ann
  • Santos Lleo, Andres de
  • Popel, Aleksander S.
  • Payne, Stephen J.
  • Arroyo, Alicia G.
Item Type: Article
Título de Revista/Publicación: Journal of the American Heart Association
Date: 2019
ISSN: 2047-9980
Volume: 8
Subjects:
Freetext Keywords: bloodflow; confocal microscopy; coronary microcirculation; mathematical modeling; myocardial infarction
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica y Bioingeniería
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Microcirculation is a decisive factor in tissue reperfusion inadequacy following myocardial infarction (MI). Nonetheless, experimental assessment of blood flow in microcirculation remains a bottleneck. We sought to model blood flow properties in coronary microcirculation at different time points after MI and to compare them with healthy conditions to obtain insights into alterations in cardiac tissue perfusion. Methods and Results. We developed an image‐based modeling framework that permitted feeding a continuum flow model with anatomical data previously obtained from the pig coronary microvasculature to calculate physiologically meaningful permeability tensors. The tensors encompassed the microvascular conductivity and were also used to estimate the arteriole–venule drop in pressure and myocardial blood flow. Our results indicate that the tensors increased in a bimodal pattern at infarcted areas on days 1 and 7 after MI while a nonphysiological decrease in arteriole–venule drop in pressure was observed; contrary, the tensors and the arteriole–venule drop in pressure on day 3 after MI, and in remote areas, were closer to values for healthy tissue. Myocardial blood flow calculated using the condition‐dependent arteriole–venule drop in pressure decreased in infarcted areas. Last, we simulated specific modes of vascular remodeling, such as vasodilation, vasoconstriction, or pruning, and quantified their distinct impact on microvascular conductivity. Conclusions. Our study unravels time‐ and region‐dependent alterations of tissue perfusion related to the structural changes occurring in the coronary microvasculature due to MI. It also paves the way for conducting simulations in new therapeutic interventions in MI and for image‐based microvascular modeling by applying continuum flow models in other biomedical scenarios.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainTEC2015-66978-RUnspecifiedUnspecifiedTecnología óptica para elastografía del tejido
FP7608027CardioNextCENTRO NACIONAL DE INVESTIGACIONES CARDIOVASCULARES CARLOS III (F.S.P.)Next generation training in cardiovascular research and innovation
Government of SpainSAF2017-83229-RUnspecifiedUnspecifiedFunciones de las MT-MMP dependientes de flujo vascular en condiciones de salud y enfermedad

More information

Item ID: 64272
DC Identifier: http://oa.upm.es/64272/
OAI Identifier: oai:oa.upm.es:64272
DOI: 10.1161/JAHA.118.011058
Official URL: https://www.ahajournals.org/doi/10.1161/JAHA.118.011058
Deposited by: Memoria Investigacion
Deposited on: 07 Oct 2020 15:01
Last Modified: 07 Oct 2020 15:01
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