The effect of hyperventilation on postural balance was investigated. Voluntary hyperventilation increased body sway in normal subjects, particularly in the sagittal plane. The possibility that this hyperventilation-induced unsteadiness is due to interference with lower limb somatosensory input, vestibular reflexes or cerebellar function was assessed. (i) The effect of hyperventilation on periph...

Cerebral Hemispheric "Counter-Steal" Phenomenon During Hyperventilation in Cerebrovascular Diseases • Use of hyperventilation (HV) was recently suggested for the treatment of acute cerebrovascular insufficiency. There is indeed no general agreement on the effectiveness of hyperventilation even though clinical and experimental findings could support its value in clinical use. During carotid surg...

Chronic fatigue syndrome (CFS) is characterized by severe fatigue, lasting for at least 6 months, for which no somatic explanation can he found. Because hyperventilation can produce substantial fa­ tigue, it seems worthwhile to investigate the relationship between it and CFS. It might be hypothesized that hyperventilation plays a causal or perpetuating role in CFS. CFS patients, non-CFS patient...

A patient who presented with "hyperventilation syndrome" was initially mis-treated as severe crush injury, illustrating the need for thorough assessment of all casualties whilst on exercise prior to arranging casualty treatment and evacuation.

The overall aim of the present investigation was to examine the association between the subscales of the ASI and emotional responding to voluntary hyperventilation challenge in a panic disorder population. Based on findings from [J. Abnorm. Psychol. 110 (2001) 372.], we predicted that the AS-Physical Concerns subscale would best predict the fear response to hyperventilation. We also examined th...

PURPOSE To examine the possibility that hyperventilation, commonly used to prevent or treat increased intracranial pressure in patients with acute brain lesions, may induce significant cerebral ischemia. METHODS Local cerebral blood flow and vascular reactivity were measured before and after hyperventilation using xenon-enhanced CT in 12 patients with acute brain lesions. RESULTS Five patie...

Chronic fatigue syndrome (CFS) is characterized by severe fatigue, lasting for at least 6 months, for which no somatic explanation can he found. Because hyperventilation can produce substantial fa­ tigue, it seems worthwhile to investigate the relationship between it and CFS. It might be hypothesized that hyperventilation plays a causal or perpetuating role in CFS. CFS patients, non-CFS patient...

Chronic fatigue syndrome (CFS) is characterized by severe fatigue, lasting for at least 6 months, for which no somatic explanation can he found. Because hyperventilation can produce substantial fa­ tigue, it seems worthwhile to investigate the relationship between it and CFS. It might be hypothesized that hyperventilation plays a causal or perpetuating role in CFS. CFS patients, non-CFS patient...

The medical literature presents two major groups of disorder in which hyperventilation is a presenting feature. Disorders of mood, notably panic disorder, and disorders of brain stem function—developmental, vascular, traumatic, toxic, metabolic, degenerative or neoplastic. References to the underlying brain morphology leading to these conditions are few and imprecise, perhaps reflecting the ina...

Thirty-six adult, male unanesthetized goats were hyperventilated to a PaCO2 level of 16-18 mm Hg for 6 hours. Arterial and sagittal sinus blood and cerebrospinal fluid were analyzed for pH, blood gases, bicarbonate, lactate, and pyruvate before hyperventilation, during hyperventilation, and after the termination of hyperventilation. Total cerebral blood flow, regional brain blood flows, and cer...