This volume represents a collection of papers originally delivered by 16 cardiologists and electrocardiographers to the postgraduate course on "Electrocardiography in Infants and Children" presented at the Henry Ford Hospital, Detroit, under the auspices of the American College of Chest Physicians. These lectures were revised and edited for publication as a textbook by Drs. Cassels and Ziegler. The result is an impressively broad view of modern pediatric electrocardiography from workers representing various approaches and attitudes in their presentation of this subject.