What is fetal arrhythmia?

Fetal arrhythmia usually refers to the frequency of fetal heartbeat higher or lower than the normal range. Fetal

arrhythmia may be caused by fetal hypoxia, maternal hyperthyroidism, improper medication, improper diet, etc. When fetal arrhythmia occurs, fetal heart rate may be less than 120 beats/min or fetal heart rate greater than 160 beats/min. If fetal arrhythmia persists, it will cause the fetus to fail to obtain or fully utilize oxygen and prone to brain tissue damage.