Collected Works of Francis Sibson, M.D., Lond, Vol. 3 of 4 (Classic Reprint)

Download or read book Collected Works of Francis Sibson, M.D., Lond, Vol. 3 of 4 (Classic Reprint) written by Francis Sibson and published by Forgotten Books. This book was released on 2018-02-07 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Collected Works of Francis Sibson, M.D., Lond, Vol. 3 of 4 The general systolic movements of that part Of the left ventricle which lies to the outside of the right ventricle, are also from right to left, and from above downwards. There is, however, a singular diversity in the movements of the part in question; while the apex of the left ventricle moves for wards, upwards, and from right to left, a small portion Of that ventricle contiguous to the apex moves from left to right, dragging with it the contiguous portion Of the right ventricle, while the two auricular thirds of the ventricle go from right to left. The aorta, like the pulmonary artery, descends about a third Of an inch during the systole. From this it is to be observed, that the whole of the anterior portion of the heart, and the great vessels, have a gliding or friction movement during both systole and diastole - that, during the, systole, the anterior walls of the heart move diagonally from below upwards, and from right to left, the horizontal movement of those portions Of the right auricle and ventricle near their junction, and of the auricular appendage, being by much the most exten sive - and that the aorta and pulmonary artery descend during systole, and ascend during diastole. In short, the various cavities in part exchange places during the systole and diastole during systole, the ventricles empty themselves, the auricles and the arteries become more full, and where they adjoin the ventricles, both the auricles and the arteries occupy a portion of space previously occupied by the ven tricles during the diastole, the ventricles regain their position, and the auricles and arteries go back to theirs. 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.