胎儿心律失常通常指在无宫缩时,胎儿心律不规律变化或者胎儿心率持续超过160次/分或低于120次/分。胎儿心律失常临床较常见,占胎儿总数的1%~2%[1]。据报道约10%的胎儿心律失常同胎儿的心血管畸形、胎儿死亡、胎儿神经系统畸形相关[2]。由于胎儿心电信号难以用其它无创方法获得,超声心动图是目前临床应用于诊断与鉴别诊断胎儿心律失常的首先方法。目前,超声心动图主要通 Fetal arrhythmia usually refers to the absence of contractions, irregular fetal heart rhythm or fetal heart rate continued more than 160 beats / min or less than 120 beats / min. Fetal arrhythmia clinical more common, accounting for 1% to 2% of the total number of fetuses [1]. About 10% of fetal arrhythmias are reported to be associated with fetal cardiovascular malformations, fetal death, and fetal neurological deformities [2]. As fetal ECG is difficult to obtain with other noninvasive methods, echocardiography is the first clinical application in the diagnosis and differential diagnosis of fetal arrhythmia. At present, the main echocardiography