The aim of this book is to give an up to date account of recent developments in the field of cardiomyopathy. Many authors, all experienced workers in their fields, - most from Germany - have contributed to this volume. It would appear that the diagnosis of cardiomyopathy is now made more often than it was 10 years ago. The reason for this is probably not that the incidence of the disease has increased, but that it is better recognized. Where conventional clinical investigation may have failed to define the underlying disease process in a given patient, improved or more widely used diagnostic tools, such as selective coronary arteriography and endomyocardial biopsies, have contributed greatly to proper diagnosis. Furthermore, uniformity of terminology has also taken place during the last few years, permitting more accurate categorization of patients suffering from this entity. The difficult subject of terminology is discussed in a special section.