This is a pioneering book in veterinary medicine. The reader will be ableto visualise what really is happening in a diseased heart. Through threedimensional representation and augmented reality, every disorder can be seen, almost touching the 3D model above the book. In addition, the changes in blood flow produced by the pathologies can be visualised, bringing the reader even closer to the pathophysiological reality. The text addresses the major points of pathophysiology and diagnostic keys for the most common diseases, and the illustrations and pictures are a bridge between the 3D models and the text. Thus, the book succeeds in joining diagnosis, and particularly a test such as echocardiography, with the understanding of the pathophysiology.