title: A young man with near-syncope.
authors.affiliation: Department of Cardiology, Heart Failure Research Center, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands, c.vanderwerf@amc.uva.nl.
authors.forename: C
authors.initials: C
authors.lastname: van der Werf
authors.forename: P G
authors.initials: PG
authors.lastname: Postema