Resection and reconstruction of the roof of the coronary sinus for an unusually attached left atrial myxoma

Large left atrial mass attached to the lower atrial septum prolapsing via the mitral valve in diastole (A) and bouncing back into the atrium in systole (B).

Biatrial approach to myxoma used an inverted T-shaped incision (A). A broad attachment of myxoma to the lower atrial septum and the CS was identified (B and C), and the roof of the CS was partially resected (D and E) to completely excise the myxoma attachment. The CS was reconstructed (F), the atrial septal defect was closed (G) with an autologous pericardial patch, and the atrial chambers were closed (H).