J Vendrik1, E S Farag2, N H L C de Hoon3, J Kluin1, J Baan1. 1. Amsterdam Heart Centre/University of Amsterdam, Amsterdam, The Netherlands. 2. Amsterdam Heart Centre/University of Amsterdam, Amsterdam, The Netherlands. e.s.farag@amc.uva.nl. 3. Delft University of Technology, Delft, The Netherlands.