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The severity of microstrokes depends on local vascular topology and baseline perfusion

doi: 10.1101/2020.07.05.188565 , 10.7554/elife.60208 , 10.3929/ethz-b-000492836 , 10.5167/uzh-209316
pmid: 34003107
pmc: PMC8421069
doi: 10.1101/2020.07.05.188565 , 10.7554/elife.60208 , 10.3929/ethz-b-000492836 , 10.5167/uzh-209316
pmid: 34003107
pmc: PMC8421069
The severity of microstrokes depends on local vascular topology and baseline perfusion
1AbstractCortical microinfarcts are caused by blood flow disturbances and are linked to pathologies like cerebral amyloid angiopathy and dementia. Despite their relevance for disease progression, microinfarcts often remain undetected and the smallest scale of disturbance has not yet been identified. We employ blood flow simulations in realistic microvascular networks from the mouse cortex to quantify the impact of single capillary occlusions. We reveal that the severity of a microstroke is strongly affected by the local vascular topology and the baseline flow rate in the occluded capillary. The largest changes in flow rate are observed in capillaries with two in- and two outflows. Interestingly, this specific topological configuration only occurs with a frequency of 8%, while the majority of capillaries are likely designed to efficiently supply oxygen and nutrients. Taken together, microstrokes likely induce a cascade of local disturbances in the surrounding tissue, which might accumulate and impair energy supply locally.
- University of Zurich Switzerland
- University of Zurich Switzerland
- Institute of Porous Flow and Fluid Mechanics China (People's Republic of)
- University of Vermont United States
- University of Vermont United States
QH301-705.5, Science, 10050 Institute of Pharmacology and Toxicology, 610 Medicine & health, Genetics and Molecular Biology, occlusion, energy supply, Models, Biological, Severity of Illness Index, capillary, Mice, 1300 General Biochemistry, Genetics and Molecular Biology, 2400 General Immunology and Microbiology, blood flow, Animals, Biology (General), General Immunology and Microbiology, General Neuroscience, Q, R, Hemodynamics, 2800 General Neuroscience, Brain, General Medicine, stroke, Capillaries, Oxygen, Perfusion, Stroke, General Biochemistry, Microvessels, 570 Life sciences; biology, Medicine, microvasculature, Neuroscience
QH301-705.5, Science, 10050 Institute of Pharmacology and Toxicology, 610 Medicine & health, Genetics and Molecular Biology, occlusion, energy supply, Models, Biological, Severity of Illness Index, capillary, Mice, 1300 General Biochemistry, Genetics and Molecular Biology, 2400 General Immunology and Microbiology, blood flow, Animals, Biology (General), General Immunology and Microbiology, General Neuroscience, Q, R, Hemodynamics, 2800 General Neuroscience, Brain, General Medicine, stroke, Capillaries, Oxygen, Perfusion, Stroke, General Biochemistry, Microvessels, 570 Life sciences; biology, Medicine, microvasculature, Neuroscience
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