Infants with long-QT syndrome and 2:1 atrioventricular block.
D001919:Bradycardia / Q000209:etiology; D004562:Electrocardiography; D017809:Fatal Outcome; D005260:Female; D005315:Fetal Diseases / Q000209:etiology; D006327:Heart Block / Q000150:complications* / Q000401:mortality; D006801:Humans; D007231:Infant, Newborn; D008133:Long QT Syndrome / Q000150:complications* / Q000401:mortality; D008297:Male; D011296:Prenatal Diagnosis; D015996:Survival Rate