Prenatal diagnosis of isolated tricuspid valve atresia: report of 4 cases and review of the literature.
OBJECTIVE
To describe the prenatal features of fetal tricuspid atresia.


METHODS
Four cases of fetal tricuspid atresia were prenatally diagnosed, sonographically described, and followed.


RESULTS
On the basis of this small series, the key findings for diagnosis included the demonstration of no patent tricuspid valve on the 4-chamber view, no flow across the tricuspid valve on pulsed or color Doppler flow mapping, small right ventricles, and associated interventricular septal defects. Increased nuchal translucency thickness may give the first clue leading to follow-up scans, resulting in a definite diagnosis.


CONCLUSIONS
Tricuspid atresia can be readily diagnosed prenatally. The key findings and differential diagnoses are provided.
Tongsong
Theera
T
Department of Obstetrics and Gynecology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand. ttongson@mail.med.cmu.ac.th
Sittiwangkul
Rekwan
R
Wanapirak
Cnanane
C
Chanprapaph
Pharuhas
P
D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D018785:Tricuspid Atresia / Q000000981:diagnostic imaging*; D014261:Tricuspid Valve / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D016216:Ultrasonography, Prenatal / Q000379:methods*