A recent study by Marui et al [7] suggests that atrial reduction surgery (in conjunction with a Maze procedure) is associated with recovery of sinus rhythm and improved reservoir function.

Pacing Clin Electrophysiol. 2008;31(8):1057-1063. Freedom from AF at 6 months Maze group 87.2% vs 9.4% control group 0.0001 Freedom from AF at 12 months Maze group 93.6% vs 9.4% control group 0. ...