Congenital central hypoventilation syndrome (CCHS, OMIM #209880) is a rare autosomal dominant disorder of the autonomic nervous system (ANS) characterized by an abnormal autonomic ventilatory response to progressive hypercarbia and sustained hypoxemia. Pa Congenital central hypoventilation syndrome (CCHS, OMIM # 209880) is a rare autosomal dominant disorder of the autonomic nervous system (ANS) characterized by an abnormal autonomic ventilatory response to progressive hypercarbia and sustained hypoxemia. Pa