Are there gender differences in outcomes after the Cox-Maze procedure for atrial fibrillation?

Atrial fibrillation (AF) management suggests that women do not tolerate medication rhythm control strategies as well as men do; however, AF percutaneous catheter ablation has been found to be favorable. The study purpose was to compare the sex-based outcomes for patients who undergo the Cox-Maze procedure for AF.

Data were collected through our AF surgical ablation registry. Rhythm was verified by electrocardiogram and 24-hour holter at 6 and 12 months. General health-related quality of life (Short-Form 12) and specific AF symptom burden (Atrial Fibrillation Symptom Checklist: Frequency and Severity, version 3) were obtained at baseline and 12 months.

Since 2005, a total of 540 patients have undergone a Cox-Maze procedure (34% were women). The women presented with higher operative risk [additive European System for Cardiac Operative Risk Evaluation (EuroSCORE), 6.71 ± 2.61 vs 5.25 ± 2.80, t = 5.85, P < 0.001], higher rates of congestive heart failure (49% vs 32%, P < 0.001), and more concomitant mitral valve procedures (32% vs 19%, P = 0.001). Perioperative outcomes were similar. Return to sinus rhythm off antiarrhythmics were not different at 6 and 12 months (78% vs 75%, P = 0.53, and 81% vs 80%, P = 1.00, respectively). Cumulative 2-year survival (93.9% for the men and 89.3% for the women) was not different for all-cause mortality (hazard ratio, 1.47; confidence interval, 0.68-3.21; P = 0.33) and cardiac-related mortality [women: 10/14 (71%) vs men 7/11 (64%), P = 1.00]. Health-related quality of life showed significant improvement; AF symptoms significantly decreased across the sexes.

Outcomes after the Cox-Maze procedure are similar across sex. Atrial fibrillation surgical ablation should be considered a treatment option for women-it is safe and effective, improves general health-related quality of life, and reduces AF symptom burden.