Dr. Richard Adamec received his medical doctor (MD) degree in 1957 from Charles University in Prague. In 1988, he became a privatdocent. From 1975 to 1979, he was Senior Registrar at the Cardiology Centre of the University Hospital of Geneva. From 1979 to 1998, he served as Staff Cardiologist at both the Geneva Medical University Policlinic and the Cardiology Centre of the University Hospital of Geneva. Between 1975 and 1998, he was responsible for interpreting all Holter ECG recordings performed at both those institutions.Dr. Jan Adamec received his Swiss Medical Federal diploma in 1988 and his doctorate in medicine (MD) from Geneva University in 1994. Since 1996, he has served as an FMH Specialist in Cardiology and Internal Medicine. Since 1997, he has been a Consultant Cardiologist at the Cardiology Centre (University Hospital of Geneva); an Associate Cardiologist at the Cecil Clinic Hirslanden, Lausanne; and Deputy Head Physician at the Clinic La Prairie, Montreux, Switzerland.Dr. Hein Wellens, considered the founding father of clinical arrhythmology, studied medicine at the University of Leiden. From 1973 to 1977, he was Professor of Cardiology at the University of Amsterdam. From 1977 to 2001, he served as Professor of Cardiology and Chairman of the Department of Cardiology at the Academic Hospital of Maastricht University, creating a school of arrhythmology that educated more than 130 cardiologists from around the world during his tenure. Dr. Wellens also directed the Interuniversity Cardiological Institute of the Netherlands (ICIN) from 1993 to 2003 and was Associate Editor of Circulation from 1993 to 2004. He has authored or coauthored more than 600 peer-reviewed articles, 240 book chapters, and 20 cardiology books.