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pubmed-article:17560466pubmed:dateCreated2007-6-11lld:pubmed
pubmed-article:17560466pubmed:abstractTextStudies to assess the value of clinical symptoms to predict the head-up tilt test (HUT) outcome in patients with suspicion of vasovagal syncope have shown controversial results. We undertook this study to compare the frequency of symptoms between subjects with and without history of syncope, its association with syncopal spells in those with a history of syncope and positive or negative HUT, and to identify clinical predictors of HUT outcome. Sixty seven subjects with a history of unexplained syncope and 26 subjects without a history of syncope were interviewed using a structured questionnaire before undergoing HUT, which was performed first in a passive phase and, if negative, was repeated with pharmacological challenge using 5 mg of sublingual isosorbide. Questionnaire included the 16 symptoms most frequently reported in previous studies. Only five symptoms were reported more frequently by subjects with history of syncope in comparison with subjects without it: visual blurring, dysesthesia, sighing dyspnea, tremor in fingers, and diaphoresis. Comparison of symptom frequency between patients with history of syncope and positive or negative HUT revealed that only two were significantly different: nausea and hot flashes. However, a detailed analysis of the data indicates that only hot flashes occurring just before the syncope were more common in those with a positive HUT. Although some symptoms were found more frequently in patients with a history of syncope than in those without it, the use of a structured questionnaire in the group of patients failed to predict the outcome of the HUT.lld:pubmed
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pubmed-article:17560466pubmed:authorpubmed-author:VallejoMaiteMlld:pubmed
pubmed-article:17560466pubmed:authorpubmed-author:MárquezManlio...lld:pubmed
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pubmed-article:17560466pubmed:volume38lld:pubmed
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pubmed-article:17560466pubmed:pagination579-83lld:pubmed
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pubmed-article:17560466pubmed:year2007lld:pubmed
pubmed-article:17560466pubmed:articleTitleValue of symptoms to predict tilt testing outcome in patients with clinical suspicion of vasovagal syncope.lld:pubmed
pubmed-article:17560466pubmed:affiliationSubdirección de Sociomedicina, Instituto Nacional de Cardiología, Ignacio Chávez, México, DF, México.lld:pubmed
pubmed-article:17560466pubmed:publicationTypeJournal Articlelld:pubmed