Tilt table testing in patients referred from an epilepsy clinic

AbstractObjective: To assess the role of head up tilt testing (HUT) in diagnosing probable or possible vasovagal syncope (VVS) in patients referred from an epilepsy clinic.Methods: One hundred thirty two patients underwent HUT over 36 months. Complete data were available on 128 patients (52 male) aged 14–80 (mean 36.7) years. The main indication for HUT (head up tilt at 70° for 45minutes) was recurrent undiagnosed blackouts, likely to be VVS. Patients were divided, prior to knowledge of the HUT results, into probable VVS, possible VVS, or probable/possible VVS associated with definite epilepsy.Results: HUT was positive in 72 patients (56%), and led to an alternative definite diagnosis in 31 (24%). Diagnostic change was more likely in those provisionally labelled either as possible VVS (15 of 34; 44%) or as a combination of epilepsy with possible or probable VVS (12 of 19; 63%) compared to those with probable VVS (4 of 75; 5%; P