HIGHLIGHTED TOPIC Hypoxia Hyperventilation, cerebral perfusion, and syncope
نویسندگان
چکیده
R. V. Immink, F. C. Pott, N. H. Secher, and J. J. van Lieshout Laboratory for Clinical Cardiovascular Physiology, Department of Anatomy, Embryology, and Physiology, AMC Center for Heart Failure Research, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands; Department of Anesthesiology, University Medical Center, Utrecht, the Netherlands; Department of Anesthesia, Bispebjerg Hospital, Copenhagen, Denmark; Department of Anesthesia, The Copenhagen Muscle Research Center, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Department of Internal Medicine, AMC, University of Amsterdam, Amsterdam, The Netherlands; and MRC/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham Medical School, Queen’s Medical Centre, Nottingham, United Kingdom
منابع مشابه
Hyperventilation, cerebral perfusion, and syncope.
This review summarizes evidence in humans for an association between hyperventilation (HV)-induced hypocapnia and a reduction in cerebral perfusion leading to syncope defined as transient loss of consciousness (TLOC). The cerebral vasculature is sensitive to changes in both the arterial carbon dioxide (PaCO2) and oxygen (PaO2) partial pressures so that hypercapnia/hypoxia increases and hypocapn...
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The Medical Journal of Australia ISSN: 0025729X 7 June 2010 192 11 663-664 ©The Medical Journal of Australia 2010 www.mja.com.au Lessons from Practice he seizure-like activity that occurred in the two university students was probably convulsions secondary to cerebral hypoxia induced by breath-holding. Anoxic convulsions result from interruption of the oxygen supply to metabolically active neuro...
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INTRODUCTION Near-drowning incidents and drowning deaths after accidental immersion in open waters have been linked to cold shock response. It consists of inspiratory gasps, hyperventilation, tachycardia, and hypertension in the first 2-3 min of cold-water immersion. This study explored the immediate changes in cerebral blood flow velocity (Vmean) during cold-water immersion since cold shock in...
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BACKGROUND Perioperative optimization of spatially resolved near-infrared spectroscopy determined cerebral frontal lobe oxygenation (scO2) may reduce postoperative morbidity. Norepinephrine is routinely administered to maintain cerebral perfusion pressure and, thereby, cerebral blood flow, but norepinephrine reduces the scO2. We hypothesized that norepinephrine-induced reduction in scO2 is infl...
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INTRODUCTION Insufficient pre-oxygenation before emergency intubation, and hyperventilation after intubation are mistakes that are frequently observed in and outside the operating room, in clinical practice and in simulation exercises. Physiological parameters, as appearing on standard patient monitors, do not alert to the deleterious effects of low oxygen saturation on coronary perfusion, or t...
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