[The diagnosis of fetal atrio-ventricular block (author's transl)].

The case is reported of a primigravida who was found to have a fetal bradycardia of 70 per minute. A caesarean section was done with the differential diagnosis intrauterine hypoxia or fetal arrhythmia. The infant was found to have a single ventricle, single atrium, a hypoplastic aortic arch and a coartation of the aorta. The infant died neonatally.--The case was reported to emphasize the necessity of fetal electrocardiography in continual antenatal monitoring to rule out an atrio-ventricular block prior to caesarean section.