The Potential Role of Arteriolar Vasodilator Responsivfjkss in Orthostatic Intolerance
نویسنده
چکیده
منابع مشابه
Autonomic control after blockade of the norepinephrine transporter: a model of orthostatic intolerance.
Orthostatic intolerance is a debilitating syndrome characterized by tachycardia on assumption of upright posture. The norepinephrine (NE) transporter (NET) has been implicated in a genetic form of the disorder. We assessed the combined central and peripheral effects of pharmacological NET blockade on cardiovascular regulation and baroreflex sensitivity in rats. NE reuptake was blocked chronical...
متن کاملHigher postural heart rate increments on head-up tilt correlate with younger age but not orthostatic symptoms.
Reports have shown that younger individuals present with higher postural heart rate increments on head-up tilt (HUT). However, a correlation between the degree of heart rate increment and symptoms of orthostatic intolerance has not been determined. The objective of this study was to determine whether higher postural heart rate increments during HUT correlate with symptoms of orthostatic intoler...
متن کاملInfluence of regular exercise training on post-exercise hemodynamic regulation to orthostatic challenge
To prevent orthostatic hypotension, arterial blood pressure (BP) is neurally and hormonally regulated via increases in heart rate (HR) and peripheral vascular tone. After dynamic exercise, however, the latter arm is blunted because of the increased vasodilators in exercised muscles. Orthostatic tachycardia is likely a more important compensatory mechanism for post-exercise orthostatic intoleran...
متن کاملEndurance exercise training in orthostatic intolerance: a randomized, controlled trial.
Orthostatic intolerance is a syndrome characterized by chronic orthostatic symptoms of light-headedness, fatigue, nausea, orthostatic tachycardia, and aggravated norepinephrine levels while standing. The aim of this study was to assess the protective effect of exercise endurance training on orthostatic symptoms and to examine its usefulness in the treatment of orthostatic intolerance. 2768 mili...
متن کاملReduced Systolic Volume: Main Pathophysiological Mechanism in Patients with Orthostatic Intolerance?
BACKGROUND Orthostatic intolerance patients' pathophysiological mechanism is still obscure, contributing to the difficulty in their clinical management. OBJECTIVE To investigate hemodynamic changes during tilt test in individuals with orthostatic intolerance symptoms, including syncope or near syncope. METHODS Sixty-one patients who underwent tilt test at - 70° in the phase without vasodila...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2011