Linking intermittent hypoxia, sympathetic response and metabolic disturbances
نویسندگان
چکیده
منابع مشابه
Chronic intermittent hypoxia increases sympathetic responsiveness to hypoxia and hypercapnia.
We sought to determine whether chronic exposure to intermittent hypoxia (CIH) increases sympathetic responsiveness to subsequent chemoreflex stimulation. Sprague-Dawley rats were exposed to 30 days of CIH: exposure chamber %O2 [fractional concentration of chamber O2 (FcO2)] nadir 6.5-7% with return to 21% each minute for 8 h/day during the diurnal sleep period (Exp group). Sham controls (SC gro...
متن کاملIntermittent hypoxia modulates nNOS expression and heart rate response to sympathetic nerve stimulation.
Nitric oxide (NO) decreases norepinephrine (NE) release and the heart rate (HR) response to sympathetic nerve stimulation (SNS). We tested the hypothesis that the enhanced HR response to sympathetic activation following chronic intermittent hypoxia (IH) results from a peripheral modulation of pacemaking by NO. Isolated guinea pig double atrial/right stellate ganglion preparations were studied f...
متن کاملLong-term intermittent hypoxia increases sympathetic activity and chemosensitivity during acute hypoxia in humans.
We determined the effects of 10 daily exposures of intermittent hypoxia (IH; 1 h day(-1); oxyhaemoglobin saturation = 80%) on muscle sympathetic nerve activity (MSNA, peroneal nerve) and the hypoxic ventilatory response (HVR) before, during and after an acute 20 min isocapnic hypoxic exposure. We also assessed the potential parallel modulation of the ventilatory and sympathetic systems followin...
متن کاملHypobaric Intermittent Hypoxia Attenuates Hypoxia-induced Depressor Response
BACKGROUND Hypobaric intermittent hypoxia (HIH) produces many favorable effects in the cardiovascular system such as anti-hypertensive effect. In this study, we showed that HIH significantly attenuated a depressor response induced by acute hypoxia. METHODOLOGY/PRINCIPAL FINDINGS Sprague-Dawley rats received HIH in a hypobaric chamber simulating an altitude of 5000 m. The artery blood pressure...
متن کاملPattern Recognition Approach for Analysis of Metabolic Response to Intermittent Hypoxia
Intermittent hypoxia (IH) elicits two forms of respiratory plasticity, which are initiated during and after exposure to IH, i.e. a long-term facilitation and a progressive augmentation of respiratory motor output. IH is often used as a model of sleep apnea and/or respiratory plasticity in humans and animals. Procedures of IH are also applied in sport medicine and rehabilitation of respiratory d...
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ژورنال
عنوان ژورنال: Acta Physiologica
سال: 2013
ISSN: 1748-1708
DOI: 10.1111/apha.12137