A 21-year-old male admitted to the emergency room with multiple traumatic injuries and shock. Although a chest X-ray showed normal in size of cardiac shadow, echocardiography confirmed cardiac tamponade. A median sternotomy was performed and the pericardial space was evacuated of 600 ml of blood and blood clots. Minor bleeding was identified in the proximal aorta, and complete hemostasis was achieved with manual compression and fibrin glue sealing. One month follow-up showed no pseudoaneurysm formation.