From the Department of Electrophysiology, University of Leipzig—Heart Center, Leipzig, Germany (S.R., S.K., A.A., C.E., P.S., S.R., A.B., C.P., G.H.); Department of Electrophysiology, University of Dresden—Heart Center, Dresden, Germany (T.G., C.P.); and Department of Cardiology, Kantonsspital St. Gallen, St. Gallen, Switzerland (D.A.). (At 2014-10)