Diagram of the atrial switch repair

Diagram of the atrial switch repair (Mustard or Senning procedure). Patch material is used to create a baffle that diverts the deoxygenated systemic venous return from the inferior venous cava (IVC) and superior venous cava (SVC) into the left atrium (LA), where it crosses the mitral valve and into the left ventricle (LV), where it is pumped into the pulmonary circulation via the pulmonary artery (PA). The baffle is positioned in the atrium so that the pulmonary veins, which are located posteriorly, drain into the right atrium (RA). This allows for flow across the tricuspid valve and into the right ventricle (RV), where blood is pumped into the systemic circulation via the aorta (Ao).