نتایج جستجو برای: vasomotor reactivity
تعداد نتایج: 58494 فیلتر نتایج به سال:
Dysregulated psychophysiological responses have been observed in patients with fibromyalgia syndrome (FMS), although the results are inconsistent. Surface electromyographic (EMG), systolic and diastolic blood pressure, heart rate (HR), and skin conductance levels (SCLs) were continuously recorded at baseline, and during a series of stress and relaxation tasks in 90 FMS patients and 30 age and s...
BACKGROUND AND PURPOSE There is growing evidence that pharmacologic interference with the renin-angiotensin system may reduce risk of stroke, although the mechanism is unclear. Impaired reactivity of cerebral vessels has recently been recognized as a risk factor for stroke. We examined the effect of the angiotensin-converting enzyme (ACE) inhibitor perindopril on cerebral vasomotor reactivity t...
Background & Aim: Preeclampsia is the major cause of maternal and perinatal morbidity and mortality. Transcranial Doppler(TCD) as a noninvasive procedure is used to assess hemodynamic changes in middle cerebral artery(MCA). Knowing the influence of normal pregnancy and preeclampsia on brain hemodynamics is essential for proper management of anesthesia, labor and vasoactive drug usage in the...
BACKGROUND Evidence from epidemiological and neuroimaging studies suggests that cerebrovascular disease is associated with depressive disorders in the elderly, but the extent to which it contributes to the pathogenesis of late life depression is unclear. OBJECTIVE To investigate the relation between cerebral haemodynamics and depression in a population based study, using transcranial Doppler ...
Effects of Alpha Adrenergic Blockade on Autoregulation and Chemical Vasomotor Control of CBF in Stroke • Autoregulation and chemical vasomotor control of cerebral blood flow (CBF) were quantitatively tested in 19 patients with various types and sites of cerebral ischemia and infarction. The effect of alpha adrenergic blockade of cerebral vessels by phenoxybenzamine (PBZ) also was evaluated in m...
BACKGROUND AND PURPOSE Cerebral vasomotor reactivity (VMR) is a capability of cerebral vessels to dilate in response to hypercapnia. Transcranial direct current stimulation (tDCS) effects on cerebral hemodynamics have been poorly studied. METHODS Ten healthy subjects underwent anodal/cathodal tDCS on the left motor cortex. Before and after tDCS, VMR assessment by transcranial Doppler and an e...
BACKGROUND Reduced cerebral blood flow and microvascular abnormalities have been suggested as the vascular pathogenesis of Alzheimer's disease (AD). Transcranial Doppler sonography (TCD) can be used as a noninvasive method for measuring cerebral vasomotor reactivity (VMR) which represent the capability of arterioles to dilate and constrict in order to maintain cerebral blood flow. OBJECTIVE T...
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