BACKGROUND Water ingestion raises blood pressure substantially in patients with perturbed autonomic control and more modestly in older subjects. It is unclear whether prophylactic water drinking improves orthostatic tolerance in normal healthy adults. METHODS AND RESULTS Twenty-two healthy subjects, 18 to 42 years of age, with no history of syncope underwent head-up tilt-table testing at 60 d...

The tilt aftereffect (TAE) is a visual illusion in which prolonged adaptation to an oriented stimulus causes shifts in the perceptions of subsequent stimuli. Historically, the TAE has been attributed to response suppression of neurons tuned to the adapting orientation. Recent physiological studies of neurons in primary visual cortex (V1) have identified two effects of adaptation: a response sup...

BACKGROUND G-tolerance assessment is an essential element of both military pilot and pilot candidate evaluation. AIMS Attempt at prediction of individual relaxed + Gz tolerance on the basis of head-up tilt (HUT) testing. SETTINGS AND DESIGN In two stages, 20 healthy men at the mean age 21.5 years took part in this study. The first stage, a 45 min, HUT test was performed using the Westminste...

BACKGROUND Functional alterations of the autonomic nervous system have been described in relation to chronic hypoxemia in chronic obstructive pulmonary diseases. Aim of the present study was to investigate the occurrence of neuro-vegetative dysfunction during active tuberculosis in the absence of hypoxemia. MATERIALS AND METHODS Fifteen patients affected by pulmonary tuberculosis under standa...

We studied the difference in head-up tilt test responses between patients suffering from syncope who had hypertension and those who did not. A total of 338 consecutive patients with syncope underwent head-up tilt testing in our department from January 2003 to October 2004. Of these, 243 did not have hypertension (group A), whereas 95 did (group B). There were significant differences between the...

BACKGROUND prolonged head-up tilt testing and sublingual nitrate provocation are increasingly used in the diagnosis of neurocardiogenic syncope. However there are few data regarding the results of these tests in asymptomatic older subjects. OBJECTIVE to assess the responses to the prolonged head-up tilt test followed by sublingual glyceryl trinitrate provocation in asymptomatic subjects over ...

BACKGROUND The benefits of triangle tilt surgery in children with OBPI have been previously validated through measurements of statistical improvements in Mallet scores and in glenohumeral congruity. The purpose of the current study was to evaluate the effectiveness of triangle tilt surgery through the application of the Pediatric Outcomes Data Collection Instrument, a well validated questionnai...

background, aims, methods, results) max 200 words: Low frequency vertical accelerations can provoke motion sickness and nausea in ships and aeroplanes and probably, combined with horizontal (lateral) acceleration, also in cars and buses. However, tilting trains and banking aeroplanes generate roll motions, which may provoke motion sickness in motion sickness sensitive humans. Some seventy healt...

Fidelity of tomographic reconstructions is improved and reconstruction artifacts are reduced, without increasing the number of projections, by combining tilt series taken around two orthogonal axes. Test reconstructions were made from high-voltage EM of rat liver mitochondria in a 0.6 micron thick plastic section. A number of schemes for selecting tilt angles for the projections are compared. A...

A 28-year-old female with a history of situational syncope and a new-onset right sided hemiparesis is described. Tilt-up table test revealed the postural orthostatic tachycardia syndrome followed by vasovagal syncope. Neurological and internal medicine tests showed no particular disorders. The patient underwent autonomic physical training and the tilt-up test performed three months later showed...