Difficult medical circumstances and the acute critical status of the newborn often require immediate medical intervention, reducing the importance of a neurodevelopmental testing in the early stage. Further, the functional testing that can be completed on neonates is extremely limited, and the illness of the child reduces the predictive validity of a preoperative functional assessment. However, it is highly recommended to screen for neurodevelopmental delay in all children with ConHD. Children with mild cardiac symptoms and seemingly normal neurodevelopment should also be screened because several studies proved them not to be free of neuropsychological deficits either [4, 5]. Furthermore, research shows that performances at 2 years of age can be predictive for performances at 5 years which validates the importance of early screening. Because cognitive advancements can be made by intervention provided in the first years of life [1], early identification and subsequently remediation of neuropsychological deficits should be an indispensible part in the treatment of a child with ConHD. At least should these results prompt cardiologists to thoroughly question the school progress of the child and refer for neuropsychological testing when the risk for neurodevelopmental delay is suspected.