G. Gaggioli et al., A POSITIVE RESPONSE TO HEAD-UP TILT TESTING PREDICTS SYNCOPAL RECURRENCE IN CAROTID-SINUS SYNDROME PATIENTS WITH PERMANENT PACEMAKERS, The American journal of cardiology, 76(10), 1995, pp. 720
In a minority of patients with carotid sinus syndrome treated with per
manent pacing, syncope recurs during long-term follow-up. Most of thes
e patients have a positive response to head-up tilt testing, which sug
gests the presence of a more complex neurogenic disease.