Neurodevelopmental Delay-Hypotonia-Cerebellar Ataxia-Cardiac Conduction Defects Syndrome, is also known as neurodevelopmental delay-hypotonia-cerebellar atrophy-cardiac conduction defects syndrome. An important gene associated with Neurodevelopmental Delay-Hypotonia-Cerebellar Ataxia-Cardiac Conduction Defects Syndrome is EXOSC5 (Exosome Component 5). Affiliated tissues include brain.