کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1916276 | 1535205 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cerebral blood supply with aging: Normal, stenotic and recanalized
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
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چکیده انگلیسی
Results: in the range of 21-92Â years PSV in CCA decreases by 7Â mm/s/year, while in ICA only by 2.31Â mm/s/year. The decrease of EDV in carotid arteries occurs between 1.72 and 2.28Â mm/s/year. PSV in VA drops down by 0.91Â mm/s/year, EDV by 0.86Â mm/s/year. PI and RI increase with age in all vessels, but not significantly. Stenotic ICAs are associated with increased PSV in the range of 0.7-2.9Â m/s, but also with an increasing PSV variability along the growing stenosis in individual patients. In all degrees of stenoses some patients preserve normal velocities. In average the increment for each 10% of the stenosis below 50% makes 8Â cm/s, while above 50% it makes already 50Â cm/s. In persons with bilateral stenoses the increment with growing stenosis is steeper. The restoration of normal ICA lumen by means of carotid endarterectomy or by angioplasty with stenting results in an average drop by 1.23Â m/s in PSV and by 0.4Â m/s in EDV. We have investigated the ophthalmic artery and other substitution supplies and deduce, that the remarkable differences in blood flow velocity reactions to a compromised carotid lumen depend on the formation of collaterals in mutual interplay with peripheral resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Neurological Sciences - Volume 257, Issues 1â2, 15 June 2007, Pages 143-148
Journal: Journal of the Neurological Sciences - Volume 257, Issues 1â2, 15 June 2007, Pages 143-148
نویسندگان
Pavel Kalvach, Daniela Gregová, OndÅej Å koda, TomáÅ¡ Peisker, Radka Tůmová, Jana Termerová, Jaroslav Korsa,