Abstract:Abstract :Objective To analyze the ultrasonographic features of fetal cardiac heterotopic and to discuss the diagnostic value of ultrasound.Methods According to the classification of chest outside heart, retrospective analysis of 10 cases of early fetal chest outside the sonographic findings of the heart, summarize the ultrasonographic features.Results In 10 cases of fetal chest external heart, 1 case were simple external thoracic heart, and other 9 cases were combined with other malformations.The postmortem examination confirmed that in 7 cases, 3 cases of thoracic type, heart part or all located outside the chest, 3 cases of thoracoabdominal type, part of the heart located in the chest , part with abdominal organs protruding abdominal wall, 1 case of abdominal type, the heart and part of the abdominal viscera protruding the abdominal wall.Conclusions Ultrasonography has extremely high diagnostic rate and important clinical significance for fetal thoracic external heart.