منابع مشابه
Neurocirculatory abnormalities in chronic orthostatic intolerance.
BACKGROUND Chronic orthostatic intolerance (COI) occurs in postural tachycardia syndrome (POTS) and in some individuals with repeated neurocardiogenic syncope/presyncope (NCS), without POTS. This study addressed whether patients with COI and POTS or NCS have neurocirculatory abnormalities during supine rest. METHODS AND RESULTS Adult patients referred for COI who had POTS (n=90, mean+/-SEM ag...
متن کاملCardiac sympathetic dysautonomia in chronic orthostatic intolerance syndromes.
BACKGROUND In postural tachycardia syndrome (POTS) and repeated neurocardiogenic presyncope (NCS), orthostatic intolerance occurs without persistent sympathetic neurocirculatory failure. Whether these conditions involve abnormal cardiac sympathetic innervation or function has been unclear. METHODS AND RESULTS Patients with POTS or NCS underwent measurements of neurochemical indices of cardiac...
متن کاملOrthostatic intolerance and chronic fatigue syndrome--possible related conditions.
The connection between orthostatic intolerance and chronic fatigue syndrome was first introduced in 1995. It was demonstrated that many patients with chronic fatigue syndrome also had some form of orthostatic intolerance. Some studies suggested that dysautonomia may be the common problem in patients with these syndromes. Although these conditions affect an important number of people, especially...
متن کاملVascular perturbations in the chronic orthostatic intolerance of the postural orthostatic tachycardia syndrome.
Chronic orthostatic intolerance is often related to the postural orthostatic tachycardia syndrome (POTS). POTS is characterized by upright tachycardia. Understanding of its pathophysiology remains incomplete, but edema and acrocyanosis of the lower extremities occur frequently. To determine how arterial and venous vascular properties account for these findings, we compared 13 patients aged 13-1...
متن کاملCommon syndromes of orthostatic intolerance.
The autonomic nervous system, adequate blood volume, and intact skeletal and respiratory muscle pumps are essential components for rapid cardiovascular adjustments to upright posture (orthostasis). Patients lacking sufficient blood volume or having defective sympathetic adrenergic vasoconstriction develop orthostatic hypotension (OH), prohibiting effective upright activities. OH is one form of ...
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ژورنال
عنوان ژورنال: Circulation
سال: 1998
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.98.20.2154