Know about Device Closure- ASD VSD Surgery in India. The surgical treatment for atrial septal defects (ASD) and ventricular septal defects (VSDs) is an open-heart surgery. An atrial septal defect (ASD) is an abnormal hole in the wall between the two upper chambers (atria) of the heart. Due to this, an abnormal flow of blood is exchanged between the atrial chambers, which often results in too much blood flow directed towards the lungs. Like VSDs, ASDs are one of the most common congenital heart defects.More details: Looking For Device Closure- ASD VSD Surgery In India?