We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleExercise-Induced Syncope Associated With QT Prolongation and Ephedra-Free XenadrineAuthorsNasir, Javed M.; Durning, Steven J.; Ferguson, Michael; Barold, Helen S.; Haigney, Mark C.PublicationMayo Clinic Proceedings, 2004, Vol 79, Issue 8, p1059ISSN0025-6196Publication typearticleDOI10.4065/79.8.1059