Division of Perinatology, Fetal Diagnosis and Therapy, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Shizuoka, Japan.
Twin Res Hum Genet. 2022 Apr;25(2):85-88. doi: 10.1017/thg.2022.16. Epub 2022 May 13.
Twin reversed arterial perfusion (TRAP) sequence is a rare anomaly in 1% of monochorionic twin pregnancies. Few TRAP sequence cases have a rudimentary heart with cardiac motion in the acardiac twins. Herein, we investigated the venous Doppler waveform in two cases of TRAP sequence with a rudimentary heart with cardiac motion in the acardiac twin. Although both cases had veno-venous anastomoses, the venous Doppler waveforms of the umbilical vein differed. A comparison of the characteristics of the cases indicated that the existence of a ductus venosus, or greater heart pulse power, in the acardiac twin might impact the venous Doppler waveform in the pump twin.
双胎反向动脉灌注（TRAP）序列是 1%的单绒毛膜双胎妊娠中的一种罕见异常。少数 TRAP 序列病例中，无心的双胞胎中有一个原始心脏并伴有心脏运动。在此，我们研究了 2 例具有无心的原始心脏并伴有心脏运动的 TRAP 序列中的静脉多普勒血流波形。尽管这两种情况都存在静脉吻合，但脐静脉的静脉多普勒血流波形有所不同。对病例特征的比较表明，无心胎儿中存在静脉导管或更大的心脉冲功率可能会影响泵血胎儿的静脉多普勒血流波形。
