Igor R. Efimov, Ph.D.Alisann and Terry Collins Professor of Biomedical EngineeringDirector, Cardiovascular Engineering LaboratoryThe George Washington UniversityWashington, DCUSA Fu Siong Ng, M.D., Ph.D.Clinical Senior Lecturer in Cardiac ElectrophysiologyConsultant Cardiologist & Cardiac Electrophysiologist National Heart & Lung InstituteImperial College LondonLondonUnited Kingdom Jacob Laughner, PhDResearch and DevelopmentPhilips ElectrophysiologyCambridge, MA USA