This document discusses the evaluation and treatment of thoracic emergencies. It outlines the importance of identifying the mechanism of injury and treating early to prevent deaths. The history, physical exam, resuscitation, lab/radiological investigations, and classification of various conditions are described. Specific conditions like tension pneumothorax, massive hemothorax, cardiac tamponade and aortic disruption are evaluated and treatments like chest tube insertion, thoracotomy, and pericardiocentesis are presented. Myocardial contusion is also discussed.