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Fig. 4D —Fontan procedures. Sketch of lateral tunnel procedure.
Diagram shows postoperative anatomy of intraatrial tunnel (lateral tunnel
procedure). Baffle in right atrium directs inferior vena cava (IVC) flow to
lower portion of divided superior vena cava (SVC), which is connected to
pulmonary artery. Upper part of SVC is connected to superior aspect of
pulmonary artery as in bidirectional Glenn shunts. Right and left pulmonary
arteries are interconnected, while pulmonary trunk is disconnected from heart.
Most of right atrium is excluded from systemic venous circuit. Gray area shows
right atrial baffle connected to right pulmonary artery and IVC, pulmonary
trunk disconnected from heart, and SVC to right pulmonary artery
anastomosis.
