Four possible mechanisms that cause a lacunar infarct (from bottom to top): (A) an embolus from the big arteries or cardiac sources goes up to MCA and.

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Presentation transcript:

Four possible mechanisms that cause a lacunar infarct (from bottom to top): (A) an embolus from the big arteries or cardiac sources goes up to MCA and ends up entering and occluding lenticulostriate arteries, resulting in a lacunar lesion in basal ganglia; (B) if the atheroma in the parent artery (ie, MCA) is positioned at the opening of its penetrating branches, it could lead to an acute occlusion of one or several penetrating arteries, hence causing a lacunar infarct; (C) a lacunar infarct could also be due to atheroma in the perforating artery if an acute occlusion happens; (D) intrinsic small vessel disease may lead to diffused disrupted blood–brain barrier. Four possible mechanisms that cause a lacunar infarct (from bottom to top): (A) an embolus from the big arteries or cardiac sources goes up to MCA and ends up entering and occluding lenticulostriate arteries, resulting in a lacunar lesion in basal ganglia; (B) if the atheroma in the parent artery (ie, MCA) is positioned at the opening of its penetrating branches, it could lead to an acute occlusion of one or several penetrating arteries, hence causing a lacunar infarct; (C) a lacunar infarct could also be due to atheroma in the perforating artery if an acute occlusion happens; (D) intrinsic small vessel disease may lead to diffused disrupted blood–brain barrier. If this happens at an arteriolar level, plasma fluid components would enter and deposit in the vessel wall, resulting in narrowing of the arteriolar lumen, vessel wall thickening and eventually a secondary luminal occlusion and traditional infarct. MCA, middle cerebral arteries. Yulu Shi, and Joanna M Wardlaw Stroke Vasc Neurol 2016;svn-2016-000035 Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/