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Side 1 fra 116 resultater
Effect of Intermittent Hypoxia Training for Dizziness: A Randomized Controlled Trial.
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OBJECTIVE
To study the effect of intermittent hypoxia training (IHT) for dizziness.
METHODS
A single-blind, randomized controlled trial. All participants were recruited from a rehabilitation department in an acute university-affiliated hospital.
METHODS
Participants with dizziness were randomly
[Cardiorespiratory responses of animals to passive orthostasis after intermittent hypoxia during head-down tilt].
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Cardiorespiratory responses induced by upright tilt before and after intermittent hypoxia during head-down tilt, were investigated in rabbits. Arterial blood pressure, heart rate, central venous pressure, transmural filling pressure of the heart (calculated as the product of esophageal and central
Recurrent hypoxemia and dizziness in an elderly adult associated with a patent foramen ovale.
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Characteristics and analysis of right-to-left shunt-related dizziness in patients without hypoxemia.
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Physical and physiological effects on otoacoustic emissions in hypobaric hypoxia.
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Tinnitus and dizziness are symptoms of acute mountain sickness. We investigated the mechanism by which high altitude (i.e. hypobaric hypoxia) affects inner ear function by measuring transient evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emissions (DPOAE) under conditions
In-flight hypoxia events in tactical jet aviation: characteristics compared to normobaric training.
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BACKGROUND
Hypoxia continues to be a significant threat in military aviation. In an attempt to counter the hypoxia threat, military jet aviators receive periodic training using a reduced oxygen breathing device (ROBD). This study explored the characteristics of in-flight hypoxia events among
In-flight hypoxia incidents in military aircraft: causes and implications for training.
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BACKGROUND
Hypoxia has long been recognized as a significant physiological threat at altitude. Aircrew have traditionally been trained to recognize the symptoms of hypoxia using hypobaric chamber training at simulated altitudes of 25,000 ft or more. The aim of this study was to analyze incidents of
Comparison of hypobaric hypoxia symptoms between a recalled exposure and a current exposure
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Background: Aircrew members are required to attend hypoxia awareness training regularly to strengthen their memory of their personal hypoxia symptoms by undergoing training inside a hypobaric chamber. The aim of this study was to examine
Autonomic cardiovascular response to acute hypoxia and passive head-up tilting in humans.
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Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability (HRV), arterial blood pressure (MAP), and respiratory sinus arrhythmia (RSA) were recorded during supine (SUP) and passive head up tilt (HUT) in eight healthy humans, spontaneously breathing either
Dizziness.
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Dizziness is a term that means different things to different people. In this paper, dizziness from inner ear difficulties shall be taken as synonymous with vertigo, a sense of spinning in space coupled with being unsteady afoot, nauseated, and usually in a spacey, distracted state of mind. Dizziness
Orthostatic cardiovascular regulation during hypoxia and hyperoxia in patients with juvenile hypertension.
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10 patients with juvenile hypertension were investigated during normoxia, hypoxia and hyperoxia in comparison to 10 healthy volunteers. The results of heart rate, stroke volume, cardiac output and blood pressure in supine position as well as in passive orthostasis are significantly different in both
Reduced cerebral blood flow with orthostasis precedes hypocapnic hyperpnea, sympathetic activation, and postural tachycardia syndrome.
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Hyperventilation and reduced cerebral blood flow velocity can occur in postural tachycardia syndrome (POTS). We studied orthostatically intolerant patients, with suspected POTS, with a chief complaint of upright dyspnea. On the basis of our observations of an immediate reduction of cerebral blood
Protective effects of gastrodin on hypoxia-induced toxicity in primary cultures of rat cortical neurons.
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The phenolic glucoside gastrodin is the main component extracted from the rhizome of Gastrodia elata (Orchidaceae), a Chinese herbal medicine, which has long been used for treating dizziness, epilepsy, stroke and dementia. The present study aims to investigate the effect of gastrodin on
Symptom progression in acute mountain sickness during a 12-hour exposure to normobaric hypoxia equivalent to 4500 m.
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The diagnosis and quantification of severity of acute mountain sickness (AMS) continue to be problematic. What symptoms should be included in a score and how to weigh any given symptom in the total score remain matter of debate. Seventy seven healthy male (n=43) and female (n=34) volunteers, aged
Severe Hypotension, Hypoxia, and Subcutaneous Erythema Induced by Indigo Carmine Administration during Open Prostatectomy.
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Indigo carmine (also known as 5,5'-indigodisulfonic acid sodium salt or indigotine) is a blue dye that is administered intravenously to examine the urinary tract and usually is biologically safe and inert. Indigo carmine rarely may cause adverse reactions. We treated a 66-year-old man who had
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