Accurate Characterization of Rotor Activity during Atrial Fibrillation Depends on the Properties of the Multi-electrode Grid - Martinez, Laura; Romero, Lucia; Tobon, Catalina; Ferrero, Jose M.; Jalife, Jose; Berenfeld, Omer; Saiz, Javier; (2013 40th Computing in Cardiology Conference, CinC 2013, 2014)