Isolated right atrial appendage (RAA) rupture in blunt trauma--a case report and an anatomic study comparing RAA and right atrium (RA) wall thickness.

Background: Heart chambers rupture in blunt trauma is uncommon and is associated with a high mortality. The determinant factors, and the incidence of isolated heart chambers rupture remains undetermined. Isolated rupture of the right atrium appendage (RAA) is very rare, with 8 cases reported in the reviewed literature.