Heart rate/blood pressure ratio as predictor of neuromediated syncope.

Background: Predicting the occurrence of syncope in advance during tilt test could be useful to prepare the medical staff in preventing complications connected with this procedure, particularly in patients with no pre-syncopal symptoms. Our objective was to develop a simple algorithm able to predict the onset of neuromediated syncope during the tilt test.

Methods: We analysed the trend in RR interval, blood pressures, the ratio of these two variables and their derivative, as possible predictors of neuromediated syncope during tilt test.