* Radiodiagnosis department, Kasr Alainy teaching hospitals, Cairo university, Egypt;
** Fetal medicine unit, Cairo university, Egypt;
***Obstetric and gynecology department, National research center, Egypt.
Following images and videos show a case of incomplete non-obstructive cor triatriatum sinister diagnosed during second trimester scan.
A female neonate was delivered spontaneously at 37 weeks of gestation (birth weight of 3040 g and Apgar scores of 8, 9 and 10 at 1, 5 and 10 min, respectively). Postnatal adaptation was uneventful. The mother and her baby were discharged two days after delivery.
Images 1, 2, 3, and videos 1-6: Series of grey scale and color Doppler images and videos showing transverse scans of the fetal heart with a thin membrane within the left atrium dividing the atrium into proximal and distal part (cor triatriatum sinister). Communication between the two parts of the left atrium is large enough and so the dividing membrane does not obstruct the blood flow between the two parts of the left atrium.