Unroofed coronary sinus is a rare congenital cardiac anomaly

in which there is partial (either focal or fenestrated) or complete absence of the roof of the coronary sinus, which results in a communication between the coronary sinus and the left atrium. Unroofed coronary sinus is the rarest type of atrial septal defect.

How do they fix unroofed coronary sinus?

The basic repair consists of roofing the coronary sinus from within the left atrium, so that the LSVC drains through the newly created coronary sinus and its ostium into the right atrium. In the absence of a LSVC, the basic repair is simply closure of the coronary sinus atrial septal defect.

Is dilated coronary sinus normal?

Introduction The normal coronary sinus drains venous blood from the cardiac veins to the right atrium. In some instances, the coronary sinus may be dilated due to volume or more rarely pressure overload.