INTRODUCTION AND OBJECTIVES Numerous variations of the head-up tilt-table test potentiated with nitrates have been reported. After the administration of nitroglycerin, between 10 and 25 min of continued tilting have been recommended. The aim of this study was to assess the optimal duration of the pharmacological phase of the head-up tilt-table test potentiated with sublingual administration of ...

BACKGROUND & OBJECTIVES The duration of exclusive breast-feeding in Bangladesh is low. Though several studies have been carried out on breast-feeding in Bangladesh, the factors influencing the duration of breast-feeding are not studied. The purpose of this study was to assess the duration of breast-feeding among children in Bangladesh and to study socio-economic and demographic factors affectin...

The objectives were 1) to evaluate the hamstring muscle flexibility in children and adolescents; 2) to examine the relative contribution of the spinal curvatures, pelvic tilt and hamstring flexibility on the sit-and-reach (SR) score; and 3) to determine the validity of the sit-and-reach test through both active and passive hip flexion tests. 118 children and adolescents (aged 7-18 years; 60 mal...

tk;1Passive head-up tilt and exercise result in specific changes in the spectral characteristics of heart rate (HR) variability as a result of reduced vagal and enhanced sympathetic outflow. Recently analytic methods based on nonlinear system theory have been developed to characterize the nonlinear features in HR dynamics. This study was designed to assess the changes in the fractal and complex...

BACKGROUND Asymptomatic reductions in arterial pressure have been reported to occur before the onset of tilt-induced syncope. We investigated the predictive value of these reductions for a positive tilt result. METHODS AND RESULTS In a first study, 238 consecutive healthy subjects with unexplained syncope underwent a passive tilt table test. Finger systolic arterial pressure (SAP) recordings ...

The apparent tilt from vertical has been examined for vertical sinusoidal gratings in the presence of an inducing grating which was tilted 12’ from vertical. The amount of apparent tilt depended on the contrast of the test grating. At high test contrasts, the grating appeared to be tilted about 2” clockwise; at low contrasts, near threshold. there was little or no apparent tilt. If the inducing...

PURPOSE Vasovagally mediated hypotension and bradycardia are believed to be common, but difficult to diagnose, causes of syncope. Upright tilt-table testing has been proposed as a possible way to test for vasovagal episodes. This study investigated the clinical utility of this technique in the evaluation and management of patients with syncope of unknown origin. PATIENTS AND METHODS Twenty-fi...

We appreciate the interest of Dr H. J. Koch et al. in our article and the opportunity to respond. As they state, sports medicine has become more involved in syncope and in the tilt table test. The sports medicine literature recognizes the term exerciseassociated collapse (EAC) to describe athletes who are unable to stand or walk unaided as a result of lightheadedness, feeling faint, dizziness o...