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The clinical, angiographic, and Doppler findings are reported for two young patients with recurrent syncope induced by neck hyperextension during stretching. Transcranial Doppler monitoring of both posterior cerebral arteries was performed during head manoeuvres. There were reproducible rapid decreases in blood flow velocities in both patients to an average(More)
BACKGROUND AND PURPOSE Transcranial Doppler sonography has recently been used to describe cerebral hemodynamics during the Valsalva maneuver in normal human subjects. Since some changes in flow velocity during the Valsalva maneuver seem to reflect the brain's autoregulatory response to a decrease in cerebral perfusion pressure during the strain, we(More)
BACKGROUND Carotid duplex ultrasonography (CDUS) is an established non-invasive tool for assessing patients with suspected carotid bifurcation disease. Current trends show an increased dependence on CDUS in recommending patients for stroke prevention surgery. The aim of the study was to evaluate routine practice in vascular laboratories across 26 countries(More)
OBJECTIVE The aim of this study was to evaluate the efficacy and tolerability of a single 4-mg dose of sumatriptan SC for the acute treatment of adult patients experiencing a migraine attack with moderate to severe pain. METHODS In this randomized, double-blind, placebo-controlled study, subjects included men and women aged 18 to 60 years who had migraine(More)
OBJECTIVE This study was conducted to evaluate the prevalence of migraine and its responsiveness to migraine-specific therapy in patients with self-reported tension-type headache. METHODS Patients were adults (n = 423) consulting one of 54 North American study sites including primary care clinics, neurology clinics, and headache clinics. The study(More)
The objectives of the present study were to evaluate the relationship between the fractional amplitudes of the EEG derived from power spectral analysis (PSA) of the electroencephalogram (EEG) and depth of coma measured clinically with the Glasgow Coma Score, and to assess the accuracy of PSA in predicting long-term outcome. Thirty-two patients rendered(More)
BACKGROUND The underlying factors of reversion from cognitive impairment to normal cognitive functioning in stroke are not well understood. We compare demographic, cognitive and imaging factors in Vascular Cognitive Impairment, No Dementia (Vascular CIND) patients who revert to normal cognitive functioning to Vascular CIND patients who do not revert. (More)
BACKGROUND The ACST has randomised over 1670 patients to determine if carotid endarterectomy (CEA) prolongs stroke free survival versus best medical treatment alone. Some patients have had contralateral symptoms to the side under investigation, for which CEA may have been performed. This study aims to determine the prevalence of hemispheric cerebral(More)