Journal article
Dynamic changes in microvascular flow conductivity and perfusion after myocardial infarction shown by image-based modeling
- Abstract:
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Background
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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 3.3MB, Terms of use)
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- Publisher copy:
- 10.1161/JAHA.118.011058
Authors
- Publisher:
- Wiley
- Journal:
- Journal of the American Heart Association More from this journal
- Volume:
- 8
- Issue:
- 7
- Article number:
- e011058
- Publication date:
- 2019-03-22
- Acceptance date:
- 2019-02-19
- DOI:
- EISSN:
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2047-9980
- Language:
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English
- Keywords:
- Pubs id:
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pubs:978317
- UUID:
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uuid:60e1fd21-65e7-4a9a-81ef-b404057b4886
- Local pid:
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pubs:978317
- Source identifiers:
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978317
- Deposit date:
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2019-03-01
Terms of use
- Copyright holder:
- Gkontra, P et al
- Copyright date:
- 2019
- Notes:
- © 2019 Gkontra, P et al. Published on behalf of the American Heart Association, Inc., by Wiley Blackwell. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- Licence:
- CC Attribution (CC BY)
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