This defect happens when the
main coronary artery originates from the Pulmonary Artery instead
of the Aorta. The pulmonary artery carries less oxygen in its
blood, so now the muscle of the heart which is working very hard
instead of getting fresh oxygenated blood it is getting blood
with less oxygen.
The muscle of the heart does
not like that and starts to become weaker and weaker, the muscle
walls of the heart becomes thinner and thinner, and this predisposes
to a condition called Cardio Myopathy (weak muscle of the heart).
Because the muscle of the heart becomes weak and thin the heart
will not be able to contract as strongly as it should and not
enough blood will be getting to the muscles, the skin, or to
the body organs to give them enough blood.
The baby will be weak, tired. Usually this condition is present
in the first 2 months of life and the baby will be very tired
during feeding, excessively sweating during feeding, taking long
breaks before feeding, sometimes cries in severe pain as he feeds.
It is very important to diagnose
this condition early because doctors may be to re-route the artery
back to where it should be coming from (the aorta).