نتایج جستجو برای: up tilt test
تعداد نتایج: 1665373 فیلتر نتایج به سال:
OBJECTIVE The aim of this study was to assess cardiac ventricular repolarization in patients with postural tachycardia syndrome (POTS) and further the possible link between ventricular repolarization and sympathetic nervous system activity. METHODS We recorded body surface ECGs together with plasma noradrenaline (NE) spillover, and muscle sympathetic nerve activity (MSNA) in twelve healthy co...
The "push-pull" effect denotes the reduced tolerance to +G(z) (hypergravity) when +G(z) stress is preceded by exposure to hypogravity, i.e., fractional, zero, or negative G(z). The purpose of this study was to test the hypothesis that an exaggerated, myogenically mediated rise in leg vascular conductance contributes to the push-pull effect, using heart level arterial blood pressure as a measure...
While the investigation of the physiological and vasovagal syncope. The pathophysiology of the vasopathophysiological effects of orthostatic stress vagal response is thus central to an understanding induced by head-up tilt table testing in humans of the role of tilting in its diagnosis. began more than 50 years ago,1 it was not until 1986 Although central, higher cortical provocation of that th...
Objective. To evaluate spectral heart rate (HR) variation using short-term ECG recordings at rest and during the tilt table test. Methods. The values of spectral components of total power (TP), high-frequency power (HF), low-frequency power (LF) and LF: HF ratio were measured at rest and during the head-up tilt in patients with temporal lobe epilepsy (TLE) and their control subjects. Results. C...
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