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Transcranial pulsed Doppler analysis of blood velocity in the middle cerebral artery was performed in 120 healthy volunteers (age 20-70 y, 12 male and 12 female subjects per decade), meeting strict selection criteria. The intention was to create normative reference data, both at rest and during hyperventilation, for the assessment of abnormality in patients(More)
INTRODUCTION Seizures are common in Intensive Care Unit (ICU) patients, and may increase neuronal injury. PURPOSE To explore the possible value of synchronization likelihood (SL) for the automatic detection of seizures in adult ICU patients. METHODS We included EEGs from ICU patients with a variety of diagnoses. The gold standard for further analyses(More)
BACKGROUND AND PURPOSE We report the results of combined recording of hemodynamic and thromboembolic phenomena during carotid endarterectomy by means of computerized electroencephalography as well as transcranial Doppler ultrasonography. The study focuses on the additional value of transcranial Doppler to detect ischemia during surgery. METHODS Combined(More)
OBJECTIVES To compare stump pressure (SP), transcranial Doppler (TCD), electroencephalography (EEG) and selective shunting during carotid endarterectomy (CEA) with preoperative positron emission tomography (PET) parameters. MATERIALS AND METHODS Preoperative PET measurements and peroperative neuromonitoring were performed in ten patients undergoing CEA(More)
OBJECTIVES Carotid endarterectomy (CEA) is intended to prevent stroke and therefore to extend lifespan. Whether CEA also influences health-related quality of life (HRQOL) is largely unknown. This study aimed to assess HRQOL-changes after CEA. DESIGN Prospective study, data assessment within 1 week before and 3 months after CEA. MATERIALS Patient(More)
BACKGROUND The role of carotid endarterectomy (CEA) for asymptomatic carotid artery stenosis (aCAS) remains a matter of debate. It seems that not only the degree of stenosis, but also other factors have to be taken in account to improve patient selection and increase the benefit of CEA for aCAS. METHODS AND RESULTS The literature pertaining aCAS was(More)
OBJECTIVE Transcranial Doppler (TCD) measures blood flow velocities (BFV) and is an indirect method of assessing cerebral blood flow (CBF). Positron emission tomography (PET) is a direct method to measure CBF. This study evaluates the correlations between TCD and PET findings Methods: Nine patients with a symptomatic carotid artery stenosis, who underwent(More)
PURPOSE This open single-center prospective study aimed to determine the redistribution of blood flow within the circle of Willis and through collateral pathways after carotid endarterectomy. Blood flow velocity and flow direction in the major cerebral arteries were determined, both at rest and during CO(2) inhalation. METHODS Carotid endarterectomy was(More)
Transcranial pulsed Doppler (TCD) measurement of blood flow velocity in the middle cerebral artery was performed in 76 healthy children and adolescents (age 2-19 years), to obtain normative reference data, both at rest and during hyperventilation (from 10 years on). The Mean Flow Velocity (MFV) decreased with increasing age. Girls of 10 years or older(More)
The impact of circulatory arrest on EEG features during defibrillation threshold testing for implantation of a cardioverter defibrillator has been disputed. Cumulation of cerebral ischemic effects during threshold testing has been observed, and consequently the advice was given to avoid short intervals between tests and to limit the test number. This study(More)