In this section
In this complex malformation the ventricles are on the opposite
side of the heart to the usual. The atriums are connected to the
incorrect ventricles and the great arteries also come from the
wrong ventricles (Transposition). Despite these problems, blood
from the lungs passes to the aorta, so the child is not blue. If a
VSD is present (as in the left illustration) this allows excessive
blood flow and pressure in the lung circulation. Other heart
defects are commonly present (eg valve abnormalities, coarctation,
pulmonary stenosis). Symptoms vary from minor or none to very
severe - mainly increasing breathlessness and failure to gain
weight in the early weeks of life.
The abnormal arrangement of the ventricles cannot be corrected,
but many of the associated problems, which are usually the cause of
symptoms, can be repaired.