Fetal conotruncal heart anomalies: is four-chamber view sufficient in the prenatal screening?

Objective: In this study, we aimed to assess the factors leading to the diagnosis of conotruncal heart anomaly in the prenatal period by reviewing the records of the cases which were diagnosed with the conotruncal heart anomaly in our perinatology unit, and to raise the awareness of the diagnosis of prenatal conotruncal heart anomaly. Methods: The referral reasons, the presence of concomitant non-cardiac anomaly and chromosomal anomaly, perinatal outcomes of the cases and the confirmation success of the diagnosis at postnatal period of the cases which were diagnosed with the conotruncal hearth anomaly at the Perinatology Unit of Kanuni Sultan Süleyman Training and Research Hospital between January 2015 and December 2016 were evaluated. Results: Among all congenital cardiac anomalies, the incidence of conotruncal heart anomaly was 20.4%. The termination of pregnancy was performed in 37 (36.6%) of 101 cases included in the study. Intrauterine fetal death was observed in 5 (5%) cases. Chromosomal anomaly and non-cardiac additional structural anomaly were found in 26.7% and 34.7% of the cases, respectively. Prenatal diagnosis was confirmed in 52 (88.1%) of 59 (58.4%) cases which born alive. It was found that four-chamber view was abnormal in only 27.7% of the cases. Conclusion: Three vessels (3V) and three vessels trachea (3VT) views should be displayed routinely in basic fetal cardiac screening in order to increase the prenatal diagnosis frequency of these anomalies as four-chamber view is mostly normal in conotruncal heart anomaly. [ABSTRACT FROM AUTHOR]