Can you tell me how is a child is affected in daily life, from having congenital heart defects?

Too vague: Congenital heart defect is an incredibly broad term, encompassing critical life-threatening & debilitating conditions as well as transient defects with no real clinical effect. The more severe defects may be irreparable or may require multiple surgeries & procedures with significant symptoms & activity restrictions. Conversely, mild defects may resolve or may not need any special consideration.