The circulation of a patient after<unk>  shunt placement requires adequate systemic venous return to support pulmonary blood flow. However, pulmonary blood flow, and thus oxygenation, is inhibited by high pressures or valvular obstructions. Pulmonary hypertension (moderate to severe) is a relative contraindication to the<unk><unk> . This is because pulmonary vascular resistance is too elevated to allow sufficient oxygenation. In physiologic parameters, this includes elevated pulmonary vascular resistance, stiff ventricle tissue, and dysfunction of the atrio-ventricular valve. In patients with hypoplastic left heart syndrome, obstruction of blood flow at the atrial septum should be examined and corrected.
Bidirectional Glenn procedure
Distal splenorenal shunt procedure
Portacaval anastomosis
Hepatoportoenterostomy
Jejunoileal bypass
Peritoneovenous shunt
Transjugular intrahepatic portosystemic shunt
Portosystemic shunt