... syncopewas studied in [13], by measuring AP before and after tilt. A reduction of AP during the initial 15 min after tilt was observed for positive cases (58% sensiti vity , 93%specificity). One of the ... entropy in time signalshave widely been used in many fields of medicine, suchas in HR for cardiac-ri sk stratification, in the estimation of electroencephalographic organization, and i n theGimeno-Blanes ... structureoverHR,SBP,DBP,andSV,individually,jointly,orbypre-selection with principal component analysis, with orwithout classification SVM, did not improve predictivecapability compared with the application of...