Informativity of pulsatility index and cerebral autoregulation in hydrocephalus
نویسندگان
چکیده
منابع مشابه
Homocysteine and pulsatility index of cerebral arteries.
BACKGROUND AND PURPOSE A pulsatility index (PI) represents vascular resistance distal to an examined artery. The purpose of the present study was to evaluate an association between plasma total homocysteine (tHcy) and PIs of the cerebral arteries in patients with ischemic stroke. METHODS Consecutive patients with ischemic stroke referred to a neurovascular ultrasound laboratory were evaluated...
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BACKGROUND AND PURPOSE This study was designed to evaluate cerebral hemodynamic changes related to diabetes mellitus (DM) with transcranial Doppler ultrasonography (TCD). METHODS We measured the flow velocities and the Gosling pulsatility index (PI) of the middle cerebral artery (MCA), extracranial internal carotid artery (ICA), and basilar artery (BA) in 56 stroke-free, normotensive patients...
متن کاملPattern of white matter regional cerebral blood flow and autoregulation in normal pressure hydrocephalus.
The mean cerebral blood flow (CBF) has generally been demonstrated to be lower in normal pressure hydrocephalus (NPH) than in normal controls. We investigated the distribution of the regional peri- and paraventricular white matter CBF (WM CBF) in NPH at baseline and during a controlled rise in intracranial pressure (ICP). Twelve patients with idiopathic NPH (mean age 69 years) underwent a CSF i...
متن کاملPulsatility in CSF dynamics: pathophysiology of idiopathic normal pressure hydrocephalus.
BACKGROUND It is suggested that disturbed CSF dynamics are involved in the pathophysiology of idiopathic normal pressure hydrocephalus (INPH). The pulsatility curve describes the relationship between intracranial pressure (ICP) and the amplitude of cardiac related ICP pulsations. The position of baseline ICP on the curve provides information about the physiological state of the CSF dynamic syst...
متن کاملCerebrospinal fluid pulsatility and hydrocephalus: the fourth circulation.
The clinical problem of hydrocephalus, and its many associated paradoxes,5 has focused new attention on the nature of the pulsatile pressures and flows in the brain. The physiology of hydrocephalus may teach us about intracranial pressure and dynamics more generally, so it is difficult for any neurosurgeon to escape the implications of this seachange, which comes with a focus on waves. I would ...
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ژورنال
عنوان ژورنال: Perspectives in Medicine
سال: 2012
ISSN: 2211-968X
DOI: 10.1016/j.permed.2012.03.006