OBJECTIVE Complex regional pain syndromes (CRPS) involve neuropathic limb pain and localized circulatory abnormalities. The authors hypothesized that (1) pediatric CRPS patients exhibit systemic autonomic symptoms and orthostatic and/or cardiac sympatho-vagal dysregulation and (2) their orthostatic regulation differs from healthy controls and pediatric patients with postural orthostatic tachyca...

BACKGROUND Syncope due to carotid sinus hypersensitivity (CSH) may be underdiagnosed due to a low level of diagnostic suspicion and fear of complications caused by massage of the carotid sinus. OBJECTIVE To investigate the relevance of carotid sinus massage in the diagnosis of non-convulsive faints and unexplained falls. METHODS Two-hundred and fifty-nine patients with a mean age of 50+/-24...

OBJECTIVES To evaluate the relationship between Trendelenburg tilt and internal jugular vein (IJV) diameter, and to examine any cumulative effects of tilt on the IJV diameter. METHODS Using a tilt table, healthy volunteers were randomised to Trendelenburg tilts of 10 degrees, 15 degrees, 20 degrees, 25 degrees, and 30 degrees. Ultrasound was used to measure and record the lateral diameter of ...

The head-upright tilt-table (HUT) test is used primarily for the investigation of orthostatic symptoms. Although this test is frequently the gold standard for the evaluation of neurocardiogenic syncope, dysautonomia and postural orthostatic tachycardia syndrome, there is a debate over its diagnostic value and method. The authors review the physiologic basis of the HUT test, the method, patterns...

BACKGROUND Tilt testing is used to establish the diagnosis of neurally mediated syncope. However, applicability of the tilt test is limited by test sensitivity and length of time required to perform the test. We hypothesized that adenosine could facilitate the induction of neurally mediated syncope through its sympathomimetic effects and therefore could be used as an alternative to routine tilt...

BACKGROUND Posture-related vasovagal syncope is by far the most frequent cause of transient loss of consciousness, and present pharmacological and cardiac pacing treatment remains unsatisfactory. A simple maneuver to prevent or diminish vasovagal reactions would be beneficial. METHODS AND RESULTS Twenty-one patients with recurrent syncope (age 17 to 74 years, 11 males) who were referred for r...

Patients who are on prolonged ventilator support in critical care unit present wide variety of complications, which range from reduction in oxygen uptake to various musculoskeletal impairments. Early mobilization and rehabilitation are encouraged to manage these complications effectively. Use of tilt table to motivate early mobilization in the intensive care unit for ventilator practices is not...

Objective: The value of head-up tilt test (HUTT) for differential diagnosis epilepsy and the autonomic nervous system functions in
 epileptic children using heart rate variability (HRV) are studied.
 Patients Methods: study group consisted 16 with idiopatic/criptogenic 12 controls. Heart rate, PR
 interval, corrected QT (QTc) QTc dispersion were calculated 12-lead electrocardiogr...

To explore the effect of posture on muscle performance, we tested the effects of body tilt angle on the strength, endurance, and fatigue of, and blood flow into, the plantar flexors. Human subjects were fixed to a tilt table that could tilt them from the horizontal (0 degrees ) to upright (90 degrees ) position and enabled force to be applied to a footplate through isometric action of the right...