Abstract
Article: Prenatal Findings in Left Atrial Isomerism and an Overview of Heterotaxy Syndrome
Authors: Claudine Thomas, MS, RT(R)(M), RDMS, and Samantha N. Callis, MHA, RDMS, RDCS
Category: Cardiac (Fetal) [FE]
Credit: 0.75 SDMS CME Credit
Objectives: After studying the article entitled “Prenatal Findings in Left Atrial Isomerism and an Overview of Heterotaxy Syndrome,” you will be able to:
Define heterotaxy syndrome
Identify the position of the fetal stomach in relation to the cardiac apex during routine obstetric examinations and determine if any abnormality identified requires further evaluation and testing
Identify ultrasound prenatal findings in both left and right atrial isomerism
Which statement best describes heterotaxy syndrome (HS)? Abnormal arrangement of the thoracic and abdominal viscera Structural cardiac manifestations and complex congenital heart disease Situs solitus arrangement of the viscera Visceral organs positioned as situs inversus totalis
The most common preexisting condition associated with HS during pregnancy is Maternal obesity Maternal tuberculosis Maternal diabetes Alcohol consumption
The most frequently encountered anomaly almost exclusively seen with left isomerism is Interruption of the IVC with azygos continuation to the SVC The ipsilateral position of the aorta and the inferior vena cava Fetal heart and its relative position to the stomach Anomalous pulmonary venous connection
The most common extracardiac abnormalities seen in HS involves which organ? Liver Spleen Gallbladder Kidney
Which list of anomalies can be found in both right- and left-sided isomerism? Polysplenia, gut malrotation, left superior vena cava Midline liver, gut malrotation, left superior vena cava Cleft palate, gut malrotation, left superior vena cava Biventricular AV connection, gut rotation, left superior vena cava
What abnormality can be detected during early fetal cardiac imaging and lead to earlier detection of left atrial isomerism? Atrial septal defects Ventricular septal defects Congenital heart block Anomalous pulmonary venous connections
Which feature is diagnostic of right-sided isomerism? Polysplenia Posterior location of the IVC Ipsilateral position of the IVC and the aorta Interruption of the IVC with azygos continuation to the SVC
Footnotes