consists of contiguous atrial and ventricular septal defect with markedly
abnormal atrioventricular valves.
atrioventricular canal. Large arrows indicate blood flow from left
to right through atrial and ventricular communications. Small arrows
indicate the possible blood back flow from ventricle to atria because
of the atrioventricular valve incompetence -.
is a single atrioventricular valve which is usually incompetent.
lesion is common among children with Down Syndrome. The neonate with
this feature usually have an increased pulmonary flow and develop pulmonary
Hypertension associated with the consequences of the atrioventricular
valve incompetence. Heart failure is the rule during the first months.
The ideal time for the surgery of the CAVC is between 4 and 12 months
of life before having permanent pulmonary damage from the pulmonary