A Pott shunt is a form of palliative surgery performed in patients with tetralogy of Fallot prior to the ability to repair the defect. It consists of a shunt formed between the descending thoracic aorta and the left pulmonary artery.

This does not relieve the right ventricular outflow obstruction, but simply improves pulmonary blood flow and improves cyanosis.

Article Source : Dr Frank Gaillard, Radiopaedia

References

1. Topol Eric J. and Robert M. Califf. Textbook of cardiovascular medicine. Lippincott Williams & Wilkins, 2007. ISBN: 0781770122, 9780781770125.