Changes in arginine-vasopressin and catecholamine during neurally mediated syncope induced by head-up tilt test.
نویسندگان
چکیده
منابع مشابه
Seizure-Like Activities during Head-Up Tilt Test-Induced Syncope
PURPOSE Some patients with neurally mediated reflex syncope may be misdiagnosed as epilepsy because myoclonic jerky movements are observed during syncope. The seizure-like activities during the head-up tilt test (HUT) have been rarely reported. The purpose of this study was to assess the characteristics of these seizure-like activities and evaluate whether there are differences in the clinical ...
متن کاملTriggering mechanism for neurally mediated syncope induced by head-up tilt test: role of catecholamines and response to propranolol.
OBJECTIVES We studied the triggering mechanism for neurally mediated syncope. BACKGROUND Although increased transient sympathetic tone is thought to be necessary for the development of neurally mediated syncope, little is known about the triggering mechanism for neurally mediated syncope. METHODS Plasma epinephrine (EP) and norepinephrine (NE) levels were assessed in 20 syncope patients dur...
متن کاملProcoagulatory changes induced by head-up tilt test in patients with syncope: observational study
BACKGROUND Orthostatic hypercoagulability is proposed as a mechanism promoting cardiovascular and thromboembolic events after awakening and during prolonged orthostasis. We evaluated early changes in coagulation biomarkers induced by tilt testing among patients investigated for suspected syncope, aiming to test the hypothesis that orthostatic challenge evokes procoagulatory changes to a differe...
متن کاملHead-up tilt test in complicated neurocardiogenic syncope in children.
To confirm the usefulness of head-up tilt test (HUT) in neurocardiogenic syncope (NCS) with complicating clinical features, retrospective analysis were done on 12 selected children. The age at onset was 12.7 +/- 1.9 (mean +/- SD) years. Associated clinical features were postoperative congenital heart disease (PO CHD) in 3, coexistent arrhythmia in 8 (persistent ventricular arrhythmia during exe...
متن کاملHead-up tilt test for recurrent syncope in pilots.
Syncope is defined as a sudden temporary loss of consciousness and postural tone that is associated with spontaneous recovery. Vasovagal or neurocardiogenic syncope is a common and usually benign cause of syncope. The mechanism may be cardioinhibitory, vasodepressor, or both. Diagnosis is usually made by a typical patient history with a definite trigger. Although vasovagal syncope is considered...
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ژورنال
عنوان ژورنال: Japanese Journal of Electrocardiology
سال: 1998
ISSN: 1884-2437,0285-1660
DOI: 10.5105/jse.18.424