An isolated fetal cor triatriatum dexter during a targeted anatomic survey at 22 weeks' gestation

Cor triatriatum dexter is a rare cardiac malformation characterized by division of the right atrium into two compartments by a usually fenestrated membrane, whose degree of partitioning or septation is responsible for different clinical manifestations.

We report the first case of an isolated fetal cor triatriatum dexter that was diagnosed during ultrasound screening at 22 weeks of gestation.

The sonographic examination of the fetal cardiac morphology revealed the presence of a membrane stretched between the medial and lateral walls of right atrium in the apical four-chamber view. Fetal morphology and biometric features were normal and appropriate for gestational age.

This is the first report of an isolated fetal cor triatriatum dexter that was diagnosed during ultrasound screening at 22 weeks of gestation.