Tilt table testing has long been used as a standard tool in the diagnostic evaluation of syncope. However, differences of opinion exist with regard to its utility in the evaluation of patients with only presyncopal attacks. We present the results of drug-free, 70-degree head-up tilt table tests (maximum duration of 45 minutes), conducted between May 2002 and May 2003 in the Department of Physio...

The study aim was to assess sympathetic vasomotor response (SVR) by using pulsed wave Doppler (PWD) ultrasound in patients with multiple system atrophy (MSA) and correlate with the tilt table study. We recruited 18 male patients and 10 healthy men as controls. The SVR of the radial artery was evaluated by PWD, using inspiratory cough as a provocative maneuver. The response to head-up tilt was s...

Sublingual nitroglycerin (TNG) has been introduced as a promising provocative agent for tilt table testing, but it has not been compared directly with the standard isoproterenol (ISO) infusion test previously. We tried to assess the diagnostic value and safety of TNG tilt testing as compared with ISO infusion in patients with unexplained syncope. TNG and ISO tilt tests were performed in tw...

Syncope accounts for 1–1.5% of emergency room visits and up to 6% of general hospital admissions. Patients with syncope present with a blackout, or transient loss of consciousness (T-LOC), and may present in family practice, cardiology, general medicine, accident and emergency, neurology, geriatric medicine, and psychiatry. Generally, a patient with T-LOC can only give limited details of the ev...

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 impair-ments. 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 no...

Syncope is a common clinical presentation. Although most commonly benign, it may herald a pathology with a poor prognosis. The work-up of syncope includes a careful history, physical examination, electrocardiogram, risk stratification, and appropriately directed testing. The key factor in the investigation of syncope is the presence (or absence) of structural heart disease or an abnormal electr...

CONTEXT Patients with chronic fatigue syndrome (CFS) are more likely than healthy persons to develop neurally mediated hypotension (NMH) in response to prolonged orthostatic stress. OBJECTIVE To examine the efficacy of fludrocortisone acetate as monotherapy for adults with both CFS and NMH. DESIGN Randomized, double-blind, placebo-controlled trial conducted between March 1996 and February 1...

The design and implementation of a high-speed direct digital frequency synthesizer are presented. A modified Brent-Kung parallel adder is combined with pipelining technique to improve the speed of the system. A gated clock technique is proposed to reduce the number of registers in the phase accumulator design. The quarter wave symmetry technique is used to store only one quarter of the sine wav...

BACKGROUND Intermittent pneumatic compression (IPC) has been successfully used in the treatment of venous ulcers, although the optimal setting of pressure, inflation and deflation times has not yet been established. The aim of this study was to compare the effect of two different combinations of IPC pump settings (rapid vs slow) in the healing of venous ulcers. MATERIAL/METHODS 104 patients w...