Ban goc (Tiếng Anh)

PREFACE The second edition of this book is offered with the hope that it will be as favorably received as was the former edition, The text has been carefully revised, in a few parts deleted, and extensively elaborated to bring the book up to the present knowledge concerning the scientific therapy of heart disturbances. A complete section has been added on blood pressure. PREFACE TO THE FIRST EDITION That marvelous organ which, moment by moment and year by year, keeps consistently