It takes a certain hubris to come forth with a This book emerges from the clinical book entitled Clinical Cardiac Electrophys- practice and research of the pediatric cardiac iology in the Young. There are a number electrophysiology group in the Division of of excellent texts, monographs, and reviews Pediatric Cardiology at the C. S. Mott Ch- on cardiac arrhythmias in both adults and dren's Hospital, the University of Michigan children-Josephson's and also Zipes and in Ann Arbor, and the former pediatric elec- Jalife's comprehensive texts come to mind, as trophysiology fellows from Michigan, now well as a number of others, including Deal, established electrophysiologists in their own Wolff, and Gelband's, the several volumes right. It represents a compilation of the cli- from Gillette, and the recent text from Walsh, cal course, electrocardiograms, electrophysi- Saul, and Triedman, the latter three texts fo- ologic studies, pharmacological management, cusing on children. and transcatheter ablation therapy in patients Nonetheless the past three decades have from infancy through young adulthood seen in witnessed enormous advances in the under- Ann Arbor and at the current clinical sites of standing and management of human cardiac the former Michigan fellows. Thus, while the arrhythmias. This development represents the product may be idiosyncratic, it is not prov- fruits of both basic and clinical investigations cial. We are interested in how it is done but in cardiac impulse formation and propagation not to the exclusion of other approaches.