Reduced Systolic Volume: Main Pathophysiological Mechanism in Patients with Orthostatic Intolerance?
نویسندگان
چکیده
منابع مشابه
Reduced 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 کاملOrthostatic intolerance is frequent in patients with clinically isolated syndrome
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متن کاملAbnormal baroreflex responses in patients with idiopathic orthostatic intolerance.
BACKGROUND Patients diagnosed with idiopathic orthostatic intolerance report symptoms of lightheadedness, fatigue, and nausea accompanied by an exaggerated tachycardia when assuming the upright posture. Often, these symptoms are present in the absence of any decrease in arterial pressure. We hypothesized that patients with idiopathic orthostatic intolerance would have impaired cardiac vagal and...
متن کاملCerebral Perfusion in Subjects with Orthostatic Intolerance
INTRODUCTION Orthostatic intolerance is characterized by symptoms of lightheadedness, tiredness, palpitations, blurred vision and occasionally, by loss of consciousness during standing, which are relieved upon recumbency. These symptoms are suggestive of cerebral hypoperfusion, yet they occur in the absence of orthostatic hypotension. We therefore evaluated cerebral vasoregulation in patients w...
متن کاملOrthostatic intolerance: postural orthostatic tachycardia syndrome with overlapping vasovagal syncope.
A 28-year-old female with a history of situational syncope and a new-onset right sided hemiparesis is described. Tilt-up table test revealed the postural orthostatic tachycardia syndrome followed by vasovagal syncope. Neurological and internal medicine tests showed no particular disorders. The patient underwent autonomic physical training and the tilt-up test performed three months later showed...
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ژورنال
عنوان ژورنال: Arquivos Brasileiros de Cardiologia
سال: 2016
ISSN: 0066-782X
DOI: 10.5935/abc.20160135