Magnetic resonance imaging of unroofed coronary sinus: Three cases

Unroofed coronary sinus is a rare cardiac anomaly in which communication oc curs between the coronary sinus and the left atrium due to the partial or c omplete absence of the roof of the coronary sinus. It is usually associated with other cardiovascular anomalies, especially persistent left superior v ena cava. It is often not discovered during cardiac catheterization without clinical suspicion. We report three cases of unroofed coronary sinus which were incidentally detected by magnetic resonance imaging.