Right atrium traumatic rupture presenting as chronic tamponade.

Non-penetrating cardiac traumatisms can cause cardiac rupture, myocardial contusion or, rarely, commotio cordis. In cases of rupture of a cardiac cavity, acute and severe cardiac tamponade almost invariably occurs. This paper presents an exceptionally unusual case of non-penetrating cardiac trauma resulting in right atrium rupture contained by the pericardial cavity. A situation of exceptional hemodynamic balance was established with subacute, progressive cardiac tamponade that evolved during three months, presenting gradual right-heart failure instead of the expected acute and severe cardiac tamponade. The rupture of the atrium was successfully repaired.