Glenn shunt
A surgical connection between the superior vena cava and pulmonary artery to provide pulmonary blood flow in single ventricle physiology.
Full Definition
The Glenn shunt is a cavopulmonary anastomosis connecting the superior vena cava directly to the pulmonary arteries, bypassing the heart. Originally described as an end-to-side anastomosis, it evolved into the bidirectional Glenn (superior vena cava to right pulmonary artery with preserved continuity). The Glenn shunt is typically the second stage in single ventricle palliation, performed after initial Norwood palliation and before Fontan completion. The procedure reduces volume load on the single ventricle while providing passive pulmonary blood flow. The Glenn shunt was named after American surgeon William Glenn.
Usage
Usage note: Distinguish between classic Glenn and bidirectional Glenn; part of staged single ventricle palliation.
In Context
- "The patient underwent successful Glenn shunt at 6 months of age as part of staged single ventricle palliation." — Surgical summary
- "Cardiac catheterization prior to Glenn shunt showed acceptable pulmonary artery pressures." — Pre-operative assessment