Selective Vulnerability of Cortical Border Zone to Microembolic Infarct
نویسندگان
چکیده
منابع مشابه
Selective Vulnerability of Cortical Border Zone to Microembolic Infarct.
BACKGROUND AND PURPOSE Endovascular procedures, including atrial fibrillation transcatheter ablation, may cause microembolization of brain arteries. Microemboli often cause small sized and clinically silent cerebral ischemias (SCI). These lesions are clearly visible on early postoperative magnetic resonance diffusion-weighted images. We analyzed SCI distribution in a population of patients subm...
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To test the hypothesis that alterations in electrical activation sequence contribute to depressed systolic function in the infarct border zone, we examined the anatomic correlation of abnormal electromechanics and infarct geometry in the canine post-myocardial infarction (MI) heart, using a high-resolution MR-based cardiac electromechanical mapping technique. Three to eight weeks after an MI wa...
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After myocardial infarction, a poorly contracting nonischemic border zone forms adjacent to the infarct. The cause of border zone dysfunction is unclear. The goal of this study was to determine the myofilament mechanisms involved in postinfarction border zone dysfunction. Two weeks after anteroapical infarction of sheep hearts, we studied in vitro isometric and isotonic contractions of demembra...
متن کاملStructural and electrophysiological changes in the epicardial border zone of canine myocardial infarcts during infarct healing.
Structural and electrophysiological properties of the epicardial muscle which survives on the surface of transmural infarcts of the canine heart (epicardial border zone) were studied at different times after occlusion of the left anterior coronary artery (LAD). Isolated preparations were superfused in vitro, transmembrane potentials recorded, and impulse propagation mapped. In preparations from...
متن کاملSpiral waves and reentry dynamics in an in vitro model of the healed infarct border zone.
RATIONALE Reentry underlies most ventricular tachycardias (VTs) seen postmyocardial infarction (MI). Mapping studies reveal that the majority of VTs late post-MI arise from the infarct border zone (IBZ). OBJECTIVE To investigate reentry dynamics and the role of individual ion channels on reentry in in vitro models of the "healed" IBZ. METHODS AND RESULTS We designed in vitro models of the h...
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ژورنال
عنوان ژورنال: Stroke
سال: 2015
ISSN: 0039-2499,1524-4628
DOI: 10.1161/strokeaha.114.008194