"D-loop transposition of the great arteries (this article mainly focuses on the D-loop transposition)."
"Transposition of the great arteries accounts for up to 7% of all congenital cardiac anomalies 1, with an estimated incidence of ~1-2 in 5000 births 17,18. It is an isolated abnormality in 90% of those affected and is rarely associated with a syndrome or an extra-cardiac malformation."
"Cardiac MRI allows direct visualisation of abnormal anatomy. SSFP cine sequences can additionally determine flow dynamics."
Expected headings
"Associations"
"Fetal echocardiography"
"Transthoracic echocardiography"
"Prenatal detection rates vary widely by centre and have improved significantly with routine fetal anomaly scanning 19,20. However, the majority of patients are diagnosed after birth between the first day and end of the first week of life with marked central cyanosis without respiratory distress; this includes those patients with an intact ventricular septum and those with a combination of a ventricular septal defect and concomitant left ventricular outflow tract obstruction."
"A frontal chest radiograph classically shows cardiomegaly with cardiac contours classically described as appearing like an egg on string 1. There is often an apparent narrowing of the superior mediastinum as a result of the aortic and pulmonary arterial configuration, i.e. parallel in D-loop transposition, with the main pulmonary artery posterior to the aorta."