Fig. 1From: Optimal patient selection for maze procedure in patients undergoing mitral valve diseaseSubjects. Atrial de-fibrillation and sinus node function were evaluated by direct current cardioversion (DC) under complete left atrium unloading with total cardiopulmonary bypass. The Cox-maze IV procedure (MAZE) was then performed. AF, atrial fibrillation; NSR, normal sinus rhythmBack to article page