Cerebral blood flow responses to hypocapnia during hypotension.
نویسندگان
چکیده
منابع مشابه
Cerebral blood flow responses to hypocapnia during hypotension.
Cerebral vascular responses to hypocapnia during hypotension to a mean arterial blood pressure (MAP) = 50 mm Hg induced with sodium nitroprusside (SNP, n = 12) or trimethaphan (TMP, n = 12) were examined in dogs. Cerebral vascular resistance (CVR) and cerebral blood flow (CBF) at PaCO2 = 40 mm Hg, and PaCO2 = 20 mm Hg were examined first at normal MAP then at hypotension in six dogs in the SNP ...
متن کاملCerebral blood flow velocity underestimates cerebral blood flow during modest hypercapnia and hypocapnia.
To establish the accuracy of transcranial Doppler ultrasound (TCD) measures of middle cerebral artery (MCA) cerebral blood flow velocity (CBFV) as a surrogate of cerebral blood flow (CBF) during hypercapnia (HC) and hypocapnia (HO), we examined whether the cross-sectional area (CSA) of the MCA changed during HC or HO and whether TCD-based estimates of CBFV were equivalent to estimates from phas...
متن کاملTotal and regional cerebral blood flow during hypotension, hypertension, and hypocapnia. Effect of sympathetic denervation in dogs.
22. Grimson BS, Robinson SC, Danford ET, Tindall GT, Greenfield JC Jr: Effect of serotonin on internal and external carotid artery blood flow in the baboon. Am J Physiol 216: 50-55, 1969 23. Abboud FM, Eckstein JW: Comparative changes in segmental vascular resistance in response to nerve stimulation and to norepinephrine. Circ Res 18: 263-277, 1966 24. Abboud FM: Vascular responses to norepinep...
متن کاملAutoregulation of cerebral blood flow during controlled hypotension in baboons.
The effect of graded, progressive hypotension on the autoregulation of cerebral blood flow was studied in anaesthetised baboons. Progressive hypotension was produced over a period of four to five hours, either by graded haemorrhage or by the administration of increasing concentrations of hypotensive drugs. During haemorrhagic hypotension autoregulation was maintained until the mean arterial pre...
متن کاملCerebral blood flow during dihydralazine-induced hypotension in hypertensive rats.
The cerebrovascular effects of graded, controlled dihydralazine-induced hypotension were studied in rats with renal hypertension (RHR) and spontaneous hypertension (SHR). Repeated measurements of cerebral blood flow (CBF) were made using the intraarterial 133Xenon injection technique in anaesthetised normocapnic animals. Dihydralazine was administered in single increasing i.v. doses (0.1 to 2 m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Stroke
سال: 1984
ISSN: 0039-2499,1524-4628
DOI: 10.1161/01.str.15.5.878