This video introduces the viewer to a philosophic approach for, and a morphologic background to, the diagnosis of children with congenitally malformed hearts. In each video of the series, the anatomy is demonstrated as seen in echocardiographic cuts, relating to the three-dimensional structure of the heart, and then the echocardiographic images themselves are shown, demonstrating the window from which they have been obtained. This first video offers an introduction to normality, showing the orthogonal planes of the heart relative to the body, and illustrates how the echocardiorapher interrogates each plane. Emphasis is then placed on normal anatomic features which underscore sequential segmental analysis. The explanatory booklet contains video time codes to guide the viewer.