title: Reversible central apnea in an infant with cyanotic heart disease.
abstract: The purpose of this report is to present the findings in a neonate with tetralogy of Fallot and a history of prolonged sleep-related apnea requiring resuscitation. At a baseline arterial oxygen pressure of 46 mm Hg, his preoperative responses to carbon dioxide during non-REM sleep (26.1 and 26.6 ml/kg/min/mm Hg of alveolar carbon dioxide tension [PACO2]) were identical to those reported in near-miss sudden infant death syndrome. Following a systemic-pulmonary arterial shunt, the arterial saturation reached 95 percent, and no further apnea occurred. The prompt normalization of the response to carbon dioxide following surgery (75.2 and 75.4 ml/kg/min/mm Hg of PACO2) indicates that, unlike infants with the sudden infant death syndrome, a low sensitivity to carbon dioxide in infants with cyanotic heart disease may be dependent on hypoxemia and, thus, reversible.
mesh_terms: D002245:Carbon Dioxide / Q000097:blood*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010100:Oxygen / Q000097:blood; D012891:Sleep Apnea Syndromes / Q000097:blood*; D012894:Sleep Stages; D013771:Tetralogy of Fallot / Q000097:blood*
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen