Chest radiograph cardiac enlargement, with prominence of the pulmonary artery, right atrium, and right ventricle, in a patient with primary pulmonary hypertension. The lung fields are abnormally translucent in association with reduced pulmonary blood flow. (Reproduced, with permission, from Cheitlin MD, Sokolow M, McIlroy MB. Clinical Cardiology, 6th ed. Originally published by Appleton & Lange. Copyright © 1993 by The McGraw-Hill Companies, Inc.) Source: Heart Disease, Current Medical Diagnosis & Treatment 2017 Citation: Papadakis MA, McPhee SJ, Rabow MW. Current Medical Diagnosis & Treatment 2017; 2016 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1843/cmdt17_ch10_ef117.png&sec=135707627&BookID=1843&ChapterSecID=135705950&imagename= Accessed: January 03, 2018 Copyright © 2018 McGraw-Hill Education. All rights reserved