Click on image to view larger version.

Figure 2 Diagrams of surgical anatomy with suture lines and of typical electrode catheter placement in Mustard and Senning patients. All important structures posterior to the level of the tricuspid valve are shown. The pulmonary venous atrium and the systemic venous baffle (cutaway) are illustrated in the Mustard diagram. The circle representing the coronary sinus ostium (CS os) is broken to emphasize its inconstant relationship with the adjacent portion of the baffle’s suture line. In the Senning diagram, only the systemic venous atrium and the anterior atrial septal remnant portion of the pulmonary venous atrium are shown. See text for details. LA = left atrial catheter; LAA = left atrial appendage; LV = left ventricular catheter; MV = direction of mitral valve location; RAA = right atrial appendage.