The Maze I procedure resulted in a regular rhythm in all 8 patients undergoing mitral valve surgery, compared to 1 of 4 patients receiving the Maze III procedure.
Observational (n=12)
How do the outcomes of Maze I and Maze III procedures compare when performed concomitantly with mitral valve surgery in patients with chronic atrial fibrillation?
In a small series of patients undergoing mitral valve surgery, the Maze I procedure resulted in regular (mostly junctional) rhythms, while the Maze III procedure showed variable rhythm outcomes but preserved systolic atrial flow in some patients.
Twelve patients were operated on for mitral valve disease with concomitant chronic atrial fibrillation. Valve repair was performed in five patients and replacement in seven. Maze I and maze III procedures were applied in eight and four patients, respectively, and are compared. There was a regular rhythm in all maze I patients with a constant junctional rhythm in three and an alternating sinus and junctional rhythm in the remainder. In one case, part of the left atrium was in atrial fibrillation with the remaining atria in sinus rhythm. In the maze III group, one patient was always on a regular rhythm, two had episodes of atrial fibrillation and one was in atrial fibrillation with controlled ventricular rate. Echocardiography showed atrial contraction in two maze I patients, but systolic atrial flow across both atrioventricular valves could only be demonstrated in two patients in the maze III group. © 1997 The International Society for Cardiovascular Surgery.
João Melo (Sat,) conducted a observational in Mitral valve disease with concomitant chronic atrial fibrillation (n=12). Maze I procedure vs. Maze III procedure was evaluated on Postoperative rhythm. The Maze I procedure resulted in a regular rhythm in all 8 patients undergoing mitral valve surgery, compared to 1 of 4 patients receiving the Maze III procedure.