This book is based on a book previously published by the senior author, Klinik und Therapie der Herzkrankheiten und der Gefässerkrankungen, which has been extremely popular, having gone through four editions in four years. For the most part it is a literal translation of the German text with a considerable rearrangement of the various sections. A number of additions have been made, as for example that dealing with atelectasis, syphilitic myocardial involvement, the blood pressure in mitral diseases, the symptoms in tricuspid insufficiency, calcification of the aorta, pulmonary stenosis and regurgitation, the differentiation between rheumatic fever and subacute bacterial endocarditis, aneurysm of the aorta, vena cava thrombosis, periarteritis nodosa, painless coronary thrombosis and heart disease in the Negro. The sections on congenital heart disease and pericarditis have been completely reorganized and an attempt has been made to introduce American concepts of heart disease. It is hoped that in future editions