Excerpt from The American Journal of Roentgenology, Radium Therapy and Nuclear Medicine, 1927, Vol. 7 To my mind, it is not enough to determine the actual size of the heart. One should also attempt to estimate the relative size of the Various chambers of the heart, and as I shall attempt to show, this is virtually impossible by radiographic methods. In addition, it is further possible by direct observation Of the cardiac movements to gain some idea of the vigor of the heart muscle itself, of its rela tion to the remaining structures of the thorax not only in a static but in a dynamic sense. By means of these observations we are then in a position to assist' the internist in a determination not only of the actual size of the heart as a whole, but of its individual chambers and of the functional capacity of the muscle. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.