Comportamiento diferencial de la tensión arterial de pacientes con síncope neuro-cardiogénico en la fase inicial de la prueba de inclinación

neurocardiogenic syncope (ncs) is diagnosed by means of a head-up tilt table tests (hutt). this is a prolonged test although early outcome predictors are known. methods: we conducted a study among patients engaged in a syncope study protocol. we performed hutt in all of them and compared the basal arterial pressure with the arterial pressure at the end of a the 70° tilting. results: we performed 185 hutt studies. systolic blood pressure (bp) raised 0.9% among patients with a negative test, whereas patients with a positive hutt showed a 2.3% decrease (p = 0.2) in the same measurement. diastolic bp increased 34% among negative hutt patients and 14.9% among patients with positive test (p = 0.02). we calculated a relative risk of 1.45 for positive test when the combination of systolic bd decrease and dyastolic increase was present, according to the percentage of change (ic95%: 1.1 to 7.8). conclusions: the combination of systolic bp reduction and diastolic bp elevation at the end of the 70° tilting is associated with an increased risk of having a positive hutt. these changes might be related to differential sympathetic stimulation.