How safe is congenital heart defect surgery ? what are chances of any complication

Depends on surgery: There are many different types of congenital heart disease that vary in severity, and thus many different types of surgical procedures to correct them. It is best to discuss this with a cardiologist or cardiac surgeon who knows the specific defect & has performed such procedures/surgeries. Like any surgery, there is inherent risk, but the risk of not correcting the defect is often much greater.

Variable: The safety depends on the type of heart surgery. One of the most important things is the experience of the surgeon and hospital. Like anything else, practice makes perfect. In general, new programs that have performed few operations have much higher complication rates. The type of operation is also important. Please discuss your specific risks with your cardiologist.