At the time of its publication (1976) echocardiography, particularly its techniques and interpretation, was a topic that was commonly given only brief mention or omitted entirely from most medical publications. In this monograph, Sonia Chang describes the specific details of performing the echocardiographic examination as well as some of the tricks of the trade she had learned during her career in this field. Although no one can become an expert in echocardiography by merely reading a text, one can become better informed and more proficient. This text will help to do so.