نتایج جستجو برای: hemodynamic response function
تعداد نتایج: 2085600 فیلتر نتایج به سال:
Hemodynamic response magnetic resonance imaging: application for renal hemodynamic characterization.
BACKGROUND The clinical use of iodinated radiocontrast agents or gadolinium for renal perfusion imaging is limited in the presence of renal dysfunction. We have previously demonstrated the feasibility of hemodynamic response imaging (HRI), a functional magnetic resonance imaging (MRI) method combined with hypercapnia and hypercapnic-hyperoxia, for monitoring changes in liver perfusion and hemod...
Brain activity can be monitored non-invasively by near-infrared spectroscopy (NIRS), which has several advantages in comparison with other imaging methods, such as flexibility, portability, low cost and biochemical specificity. Moreover, patients and children can be repetitively examined. Therefore, the objective of the study was to test the feasibility of NIRS for the event-related approach in...
Nine normal volunteers underwent assessment of renal, forearm, and hormonal responses to orthostasis (quiet standing) in the presence and absence of 1 week of oral propranolol (160 mg/day). This was done to test the hypothesis that physiologic decrements in renal function (glomerular filtration rate, effective renal plasma flow, and absolute urinary sodium excretion) are attenuated by propranol...
Background: Studies on hemodynamic changes in brain death are in vitro and in animal studies. And very few studies have been done on the hemodynamic changes of brain death. The aim of this study was to use advanced hemodynamic monitoring with echocardiography for evaluation of donated heart and to evaluate the moment by moment brain death patients with advanced hemodynamic monitoring tools and ...
In functional neuroimaging studies, the hemodynamic response to functional activation is used as a surrogate marker for neuronal activity, typically in response to task paradigms that use periodic stimuli. With use of a model system of electrical forepaw stimulation in rats (n = 14) with laser-Doppler (LD) monitoring of cerebral blood flow (CBF) changes in the somatosensory cortex, the effects ...
Spinal cord injured (SCI) individuals show an altered hemodynamic response to metaboreflex activation due to a reduced capacity to vasoconstrict the venous and arterial vessels below the level of the lesion. Exercise training was found to enhance circulating catecholamines and to improve cardiac preload and venous tone in response to exercise in SCI subjects. Therefore, training would result in...
Hemodynamic responses that control blood pressure and the distribution of blood flow to different organs are essential for survival. Shear forces generated by blood flow regulate hemodynamic responses, but the molecular and genetic basis for such regulation is not known. The transcription factor KLF2 is activated by fluid shear stress in cultured endothelial cells, where it regulates a large nu...
on next page. Subject terms on next page. 29 [email protected] 3 APR 2006 2 APR 2011 Final 01-05-2011 14. ABSTRACT Acute alcohol intoxication (AAI) impairs the hemodynamic counteregulatory response to trauma and hemorrhagic shock (HS), blunts the pressor response to fluid resuscitation (FR), suppresses the HS·induced neuroendocrine response, impairs pro-inflammatory cytokine expression and incr...
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