[Fetal parasystolia--uncommon case of fetal arrhythmia with polyhydramnios and hydrops fetalis (author's transl)].

By direct fetal electrocardiography an arrhythmic pattern comparable with parasystolia was observed during the 38th week of pregnancy. The gestational course was only complicated by polyhydramnios. The record of the FHF was considerably disturbed. The normocardic pattern showed poor irregularity, rarely accelerations and decelerations during labor activity. The ectopic QRS-complex was broadened (0,06--0,08 sec) and frequently raised. Beginning the record the frequency of the parasystolia was lower than the activity of the sinus node. A hydropic neonate was delivered by vacuum and died after bradyarrhythmia 37 minutes after parturition. In spite of intensive clarification the cause of pathology was not detected.