Head Up Tilt Test
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Respostas Cardíacas e Musculoesqueléticas aos Efeitos do Tilt Test Passivo e Ativo em Indivíduos Saudáveis
Resumo Fundamento: A manutenção do ortostatismo requer interação das respostas autonômicas e musculares para um controle postural eficiente e minimizar oscilações do corpo e facilitar o retorno venoso frente a um tipo comum de síncope chamada neurocardiogênica (SNC). A atividade da musculatura na posição de pé pode ser documentada por meio da el
Arq. Bras. Cardiol.. Publicado em: 2018-01
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2. Alterações cardiovasculares e modulação autonômica no estresse ortostático em animais sendentários ou submetidos à treinamento físico
O sistema nervoso autônomo (SNA) tem como uma de suas principais funções, a manutenção dos níveis de pressão arterial (PA) durante os desafios ortostáticos. A maior parte das manifestações de intolerância ortostática nos humanos está relacionada à hipotensão arterial, no entanto, 5% da população podem apresentar aumento da PA em reposta a um
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2009
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3. Efeitos da suplementação de sal na profilaxia da síncope vasovagal : ensaio clínico randomizado
Introdução: Síncope e sintomas ortostáticos são comuns em pessoas saudáveis. A suplementação de sal é utilizada em pacientes com melhora na resposta pressora e aumento da tolerância ortostática. Nós testamos à hipótese de que uma suplementação de sal aumentaria a tolerância ortostática em voluntários saudáveis. Métodos e Resultados: Vint
Publicado em: 2009
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4. Estudo do controle autonomico da frequencia cardiaca em ciclistas e sedentarios
The main purpose of this work was to study the heart rate (HR) control in subjects with different aerobic capacities, during the following situations: resting, Valsalva Maneuver (VM), Respiratory 8inus Arrhythmia (R8A) and Head-up Tilt (HUT). Participated of this cross-sectional study a group of sedentary subjects (8 group), that didn t practice any regular
Publicado em: 2001
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5. Abnormality of superior mesenteric artery blood flow responses in human sympathetic failure.
1. Systemic and regional haemodynamic responses, including superior mesenteric artery blood flow, were measured during stimuli which increase sympatho-neural activity in age-matched normal subjects (controls) and in two groups of patients with sympathetic failure (pure autonomic failure and multiple system atrophy). The stimuli included the pressor tests (me
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6. Prolonged asystole induced by head up tilt test. Report of four cases and brief review of the prognostic significance and medical management.
Head up tilt is an established test for assessing patients with vasovagal syncope. Prolonged asystole during the test has previously been reported in patients suffering from the malignant form of this syndrome. Little is known about the prognostic significance of this response and there is no consensus about the optimum treatment. Four such patients are repo
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7. Effect of patient characteristics on the yield of prolonged baseline head-up tilt testing and the additional yield of drug provocation.
OBJECTIVE: To define the value of tilt testing and hte additional yield of drug provocation over prolonged baseline tilt in different patient subgroups. (Many different protocols are in use for head-up tilt testing in heterogeneous groups of patients. Not all patients in reported series have recurrent syncope, and there is often a wide age range and a variab
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8. Increase in plasma beta endorphins precedes vasodepressor syncope.
BACKGROUND--Endogenous opioids have a tonic inhibitory effect on sympathetic tone and have been implicated in the pathophysiology of vasodepressor syncope. Plasma beta endorphin concentrations increase after vasodepressor syncope induced by exercise or by fasting. AIMS--To take frequent samples for plasma beta endorphin estimation during tilt testing, and to
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9. Increase in plasma beta endorphins precedes vasodepressor syncope.
BACKGROUND--Endogenous opioids have a tonic inhibitory effect on sympathetic tone and have been implicated in the pathophysiology of vasodepressor syncope. Plasma beta endorphin concentrations increase after vasodepressor syncope induced by exercise or by fasting. AIMS--To take frequent samples for plasma beta endorphin estimation during tilt testing, and to
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10. Permanent pacing for cardioinhibitory malignant vasovagal syndrome.
OBJECTIVE--To evaluate the effect of permanent pacing in cardioinhibitory malignant vasovagal syndrome. PATIENTS AND METHODS--37 patients with permanent pacemakers for cardioinhibitory malignant vasovagal syndrome. All presented with syncope (median six episodes, median frequency two episodes a year) and after conventional investigation and invasive electrop
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11. Neurally Mediated Syncope
Neurally mediated syncope is a disorder of the autonomic regulation of postural tone, which results in hypotension, bradycardia, and loss of consciousness. A wide variety of stimuli can trigger this reflex, the most common stimulus being orthostatic stress. Typically, a patient with neurally mediated syncope experiences nausea, lightheadedness, a feeling of
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12. Salt supplement increases plasma volume and orthostatic tolerance in patients with unexplained syncope.
OBJECTIVE: To determine whether in patients presenting with posturally related syncope administration of salt increases plasma volume and improves orthostatic tolerance. Patients with poor tolerance of orthostatic stress tend to have lower than average plasma and blood volumes. DESIGN: A double blind placebo controlled study in 20 patients and an open study