Detection of reverse flow by duplex ultrasonography in orthostatic hypotension.
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چکیده
منابع مشابه
Detection of reverse flow by duplex ultrasonography in orthostatic hypotension.
BACKGROUND AND PURPOSE The aim of this study is to elucidate the effect of orthostatic hypotension on changes in cerebral blood flow. METHODS Blood flow velocities of both the common carotid artery and vertebral artery were measured using duplex ultrasonography in 12 patients: 6 with familial amyloidotic polyneuropathy, 3 with Shy-Drager syndrome, 2 with pandysautonomia, and 1 with senile ort...
متن کاملOrthostatic hypotension.
A 29-year-old white woman (weight, 1211b; height, 5 ft 6 in.) was referred to the Hypertension Unit of Massachusetts General Hospital in December 1984. She had been athletic and apparently in excellent health until September 1979 when she contracted an upper respiratory tract infection associated with wheezing. She was treated with prednisone for 5 days with resolution of the symptoms but later...
متن کاملAutoregulation of cerebral blood flow in orthostatic hypotension.
BACKGROUND AND PURPOSE We sought to evaluate cerebral autoregulation in patients with orthostatic hypotension (OH). METHODS We studied 21 patients (aged 52 to 78 years) with neurogenic OH during 80 degrees head-up tilt. Blood flow velocities (BFV) from the middle cerebral artery were continuously monitored with transcranial Doppler sonography, as were heart rate, blood pressure (BP), cardiac ...
متن کاملPrognosis of Orthostatic Hypotension
Orthostatic hypotension is defined as a fall of 20 mm or more in systolic blood pressure or of 10 mm or more in diastolic blood pressure within 3 minutes of standing [1]. All persons receiving antihypertensive drugs routinely should have their blood pressure measured in the sitting position and within 3 minutes of standing [2]. Blood pressure should not be taken immediately after eating as post...
متن کاملNeurogenic Orthostatic Hypotension
n engl j med 358;6 www.nejm.org february 7, 2008 615 A 65-year-old man reports a 6-month history of dizziness, light-headedness, weakness, and fatigue while upright. He takes no medication and has no personal or family history of neurologic disease. On physical examination, his supine blood pressure is 160/100 mm Hg, with a heart rate of 72 beats per minute; on standing, his blood pressure fall...
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ژورنال
عنوان ژورنال: Stroke
سال: 1994
ISSN: 0039-2499,1524-4628
DOI: 10.1161/01.str.25.12.2407