The Macklin effect causing a pneumopericardium.Sekhar, Aravind; Raheja, Prafull; Ikram, SohailJournal of Cardiovascular Medicine: Post Author Corrections: July 16, 2012 doi: 10.2459/JCM.0b013e328356bc37 Images in cardiovascular medicine: PDF Only Abstract Pleuropericarditis is a common clinical entity that has been reported in association with several diseases. However, pleuropericarditis following blunt thoracic trauma is very rare and difficult to diagnose. Here we present a case of a young man who presented to the emergency department with acute shortness of breath following a motor vehicle accident. He was found to have a pleuro-pericardial communication worsened by barotrauma, resulting in tension pneumopericardium. (C) 2017 Italian Federation of Cardiology. All rights reserved.