Almost every infant born with single ventricle physiology will die without surgical intervention. In these patients, surgical intervention requires systemic blood flow to be redirected directly to the lungs. Such radical intervention separates the venous system from the heart, but can have complications related to elevated venous pressure or arrhythmias.

The CAVG is a synthetic vascular tube graft with one or more hemostatic valves, constructed with visco-elastic or other semi-permeable membrane, that are ringed by radio-opaque metal.

The CAVG allows for catheter-based communications between the venous system and the heart after single ventricle surgery has been completed. The communications can be made open on a temporary or permanent basis.