Repair of cor triatriatum associated with partially unroofed coronary sinus

A young patient with cor triatriatum, secundum atrial septal defect, persis tent left superior vena cava, partially unroofed coronary sinus, and modera te tricuspid regurgitation was documented to have both a left-to-right shun t from the common pulmonary venous chamber to the right atrium and a right- to-left shunt from the partially unroofed coronary sinus to the left atrium . Resection of the membrane dividing the left atrium, closure of the atrial septal defect and the partially unroofed coronary sinus with pericardial p atches, and a tricuspid annuloplasty resulted in an excellent hemodynamic r esult. (C) 1999 by The Society of Thoracic Surgeons.