Dr S. Serge Barold is presently Clinical Professor of Medicine Emeritus at the University of Rochester, New York. He has authored over 17 books and more than 600 articles on cardiac implantable cardiac devices, electrophysiology and electrocardiography. Dr Barold has lectured all over the world and has collaborated in research with investigators from many countries. Dr Barold is also on the editorial board of many journals related to his specialty.