[Left atrium rupture after non-penetrating injury to the back].

Survival after cardiac rupture associated with blunt thoracic trauma is very uncommon. In these patients successful management demands a high index of suspicion of cardiac injury. A case of a 24-year-old woman who presented unconscious and shocked in the emergency room after motorcycle trauma strictly limited to her back is reported. Rib and sternal fractures were absent; the typical signs of cardiac tamponade were not found. Therefore the suspicion of cardiac chamber rupture was not immediate and the cardiologist was consulted after several diagnostic exams. Transthoracic echocardiography showed a pericardial effusion with clots and initial cardiac tamponade. The patient was transferred to the operating room and a large hemopericardium was disclosed. Two lacerations were noticed: the first pericardial, near the inferior vena cava, and the second one in the posterior wall of the left atrium. It is possible that the associated pericardial tear and pericardial clots could have contributed to survival. After surgical repair, carried out during cardiopulmonary bypass, the recovery was quick and complete. This case report confirms the possibility of heart chamber rupture after blunt chest trauma even in the absence of obvious thoracic lesion and it shows that the presentation could be very insidious without a "classic" clinical picture of cardiac tamponade. In front of an unexplained shock after nonpenetrating thoracic trauma, a rupture of the heart chambers should be suspected and echocardiography is mandatory. In the emergency room environment pericardiocentesis should be performed only with a quickly available cardiac surgery or in the presence of overwhelming hemodynamic failure.