Observe the 4-chamber view of the heart and identify which chamber is dilated.
The right atrium is hugely dilated.
What is the pertinent abnormality?
The tricuspid valve is abnormal. It is significantly offset as compared to the mitral valve and is displaced apically. The valve is thickened and moving abnormally. There is a large tricuspid regurgitation.
The scan is remarkable for a grossly dilated right atrium of the heart. The tricuspid valve is significantly offset as compared to the mitral valve and is displaced apically. The valve is thickened and moving abnormally. There is a large tricuspid regurgitation which could be appreciated on color as well as pulsed Doppler examination. There is atrialization of right ventricle and functional right ventricle is small. The left side of the heart is slightly compressed and appears small. There is an associated ASD as well as an ostium secundum VSD. The left ventricular outflow tract is normal and could be seen well. However, the right ventricular outflow tract is hypoplastic and could not be imaged despite best efforts. There is an overall cardiomegaly. However, the lungs at the time of scan showed apparently normal morphology and echogenicity. There is no fetal ascites or pleural effusion and no signs of hydrops. No other associated congenital anomaly could be identified.