title: [Analysis of head-up tilt test responses in patients suffering from syncope and high blood pressure].
abstract: We studied the difference in head-up tilt test responses between patients suffering from syncope who had hypertension and those who did not. A total of 338 consecutive patients with syncope underwent head-up tilt testing in our department from January 2003 to October 2004. Of these, 243 did not have hypertension (group A), whereas 95 did (group B). There were significant differences between the groups in age (P=.0001), sex (P=.048), timing of syncope development (P=.0001), and prevalence of diabetes mellitus (P=.0001). The head-up tilt test gave positive results in 168 patients (69.1%) in group A and in 63 (66.3%) in group B (P=.6; NS). There was no significant difference between the groups in the proportion of positive responses that occurred in either the baseline or nitroglycerin-enhanced phase of the test (P=.673; NS), nor in the time to onset of syncope in either phase (P=.69; NS, and P=.28; NS, respectively). However, there was a significant difference in the type of response (vasodepressor response, 33% in group A versus 49% in group B, P=.01). In the multivariate analysis, no independent variable was found to be associated with the result of the head-up tilt test.
authors.affiliation: Servicio de Cardiología, Hospital Universitario Virgen del Rocío, Sevilla, Spain. gbaron@jet.es
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Barón-Esquivias
authors.forename: Silvia
authors.initials: S
authors.lastname: Gómez
authors.forename: Aurelio
authors.initials: A
authors.lastname: Cayuela
authors.forename: Juan I
authors.initials: JI
authors.lastname: Valle
authors.forename: Alonso
authors.initials: A
authors.lastname: Pedrote
authors.forename: Angel
authors.initials: A
authors.lastname: Martínez
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D019462:Syncope, Vasovagal / Q000150:complications / Q000503:physiopathology*; D018667:Tilt-Table Test