Produced by Bryan Ness, Julia Neufeld and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.) Transcriber's Notes: Passages in italics are indicated by _underscores_. Passages in bold are surrounded by =. Small caps have been replaced by ALL CAPS. ERRATUM Page 75, Figure shown is not the Brown sphygmomanometer described in the text, but the Baumanometer manufactured by W. A. Baum Co., Inc., New York. It is claimed that the Baumanometer is made with particular care and hence the readings are said to be more accurate than other mercury instruments. It is apparently a good instrument. The author has had no personal experience with it. ARTERIOSCLEROSIS AND HYPERTENSION With Chapters on Blood Pressure BY LOUIS M. WARFIELD, A.B., M.D., (Johns Hopkins), F.A.C.P. FORMERLY PROFESSOR OF CLINICAL MEDICINE, MARQUETTE UNIVERSITY MEDICAL SCHOOL; CHIEF PHYSICIAN TO MILWAUKEE COUNTY HOSPITAL; ASSOCIATE MEMBER ASSOCIATION AMERICAN PHYSICIANS; MEMBER AMERICAN ASSOCIATION PATHOLOGISTS AND BACTERIOLOGISTS; AMERICAN MEDICAL ASSOCIATION, ETC., FELLOW AMERICAN COLLEGE OF PHYSICIANS _THIRD EDITION_ ST. LOUIS C. V. MOSBY COMPANY 1920 COPYRIGHT, 1912, 1920, BY C. V. MOSBY COMPANY _Press of C. V. Mosby Company St. Louis_ TO MY MOTHER THIS VOLUME IS AFFECTIONATELY DEDICATED PREFACE TO THIRD EDITION Several years have elapsed since the appearance of the second edition of this book. During this time there has been considerable experimentation and much writing on arteriosclerosis. The total of all work has not been to add very much to our knowledge of the etiology of arterial degeneration. Points of view and opinions change from time to time. It is so with arteriosclerosis. In this edition arteriosclerosis is not regarded as a disease with a definite etiologic factor. Rather it is looked upon as a degenerative process affecting the arteries following a variety of causes more or less ill defined. It is not considered a true disease. Possibly syphilitic arteritis may be viewed as an entity, the cause is known and the lesions are characteristic. Much new material and many new figures have been added to this edition. Some rearranging has been done. The chapter on Blood Pressure has been much expanded and some original observations have been included. The literature has been selected rather than indiscriminately quoted. Much that is written on the subject is of little value. It has always seemed to the author that there is not enough of the personal element in medical writings. At the risk of being severely criticized, he has attempted to make this book represent largely his own ideas, only here and there quoting from the literature. New chapters on Cardiac Irregularities Associated with Arteriosclerosis, and Blood Pressure in Its Clinical Application have been added.