Intracardial blood cyst causing subpulmonary stenosis in congenitally corrected transposition.

A patient with congenitally corrected transposition is described. The second sound showed wide fixed splitting of two loud components and hemodynamic and angiocardiographic examinations revealed subpulmonary stenosis. At autopsy a large intracardial blood cyst was found below the pulmonary valves in the outflow region of the morphological left ventricle.