Baby Brendan was brought to us in a condition which was complicated and need surgical intervention to correct the anomaly. In this syndrome the pure and impure blood gets mixed in the heart and the amount of blood flow to the lungs is decreased. It is the most common complex heart defect, representing 55-70%, and the most common cause of blue baby syndrome. It can prove fatal if it is not treated in time," said Dr. N S Devananda, Consultant Cardiac Surgeon, Wockhardt Hospitals, Bangalore (Now a Network Hospital of Fortis).