This Cardiovascular Principles guidebook represents three years of classroom registry examination presentations at the School of Cardiac Ultrasound. The apparent strength of the guide is that it takes the cardiovascular principles examination outline and breaks it down into its smallest components, discusses eacti component thoroughly, with each section followed by practice review and board review examination questions. The Cardiovascular Principles at a Glance section provides a condensation of the pertinent material, and the Cardiovascular Principles 500 section provides a challenging final test. When completed, the reader is confidenit that the cardiovascular principles portion of the registry examination has been carefully studied.