completely unroofed and the plsvc was draining directly into the left atrium. surgeons reroofed the coronary sinus, reconstructed the atrial septum to prevent drainage, and redirected the plsvc to the right atrium. prognosis with surgical intervention, many individuals suffering from this defect are able to go on and lead fully functional lives. issues may arise if the heart condition goes undiagnosed, thus putting an individual at an increased risk of stroke. however, it could remain a benign anomaly in other individuals and never result in symptoms or a diagnosis. related syndromes persistent left superior vena cava (plsvc) atrial septal defect (asd) ventricular septal defect (vsd) atrioventricular septal defect (avsd) patent ductus arteriosus (pda) acyanotic heart defect