This manual was prepared primarily as an uncomplicated and ready reference work to help the busy physician in his everyday professional tasks. The following subjects are presented: simplified physiology, radiographic interpretation, electrocardiographic interpretation, patent ductus arteriosus, coarctation of the aorta, vascular rings, pulmonary stenosis, interatrial septal defects, interventricular septal defects, tetralogy of Fallot, transposition of the great vessels, mitral stenosis, mitral insufficiency, aortic stenosis, aortic insufficiency, coronary insufficiency, cardiac catheterization, angiocardiography, and a bibliography. Each subject receives about five pages in the book and contains a drawing of the lesion, a discussion in outline form, roentgenograms, electrocardiograms, and a comment on the history, examination, and treatment of one or more illustrative cases. The presentation of each subject is brief and easily understood. This manual contains a wealth of information based on the extensive experience of the authors. If a practitioner were desirous of having a surgeon discuss one of these