Hypoplastic Right Heart Syndrome, also known as right hypoplastic heart syndrome, is related to interatrial communication and heart septal defect. An important gene associated with Hypoplastic Right Heart Syndrome is TBX20 (T-Box Transcription Factor 20), and among its related pathways/superpathways are Nervous system development and Cardiac progenitor differentiation. Affiliated tissues include heart, and related phenotypes are normal and embryo