Snapshot A 22-year-old man presents to the emergency department after a high-speed motor vehicle accident. He was in the passenger seat and was wearing a seatbelt. The patient reports chest pain with breathing difficulty. Vital signs are significant for a blood pressure of 135/95 mmHg and a pulse of 105/min. On physical exam, the patient is stable with a seatbelt imprint on the skin of his chest. An anteroposterior radiograph of the chest demonstrates an obscured aortic knob. Preparations are made to get a contrast-enhanced CT scan of the chest and trauma surgery is consulted. Introduction Definition login to view 1 more bullet Pathophysiology login to view 3 more bullets Anatomy login to view 3 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 6 more bullets Imaging Plain anteroposterior chest radiograph login to view 7 more bullets Tracheoesophageal echocardiography login to view 2 more bullets Contrast-enhanced chest CT login to view 2 more bullets Treatment Operative login to view 3 more bullets