The Conversion Rate Of Af After Modified Cox Maze ? Evaluation And Correlation Analysis

ObjectiveSurgical ablation is effective in atrial fibrillation cardioversion.Enlarged left atrium is now believed to have negative impact on ablation result.However,patients with valvular heart diseases often have left atrium bigger than 60mm.For these patients,whether concomitant ablation should be done or not is still controversial.MethodsFrom 2013-2015,306 patients received concomitant ablation.Based on the diameter of LA as measured by intra-operative TEE,we separated these patients into two groups(…)and followed them at four time points(time at discharge….)We then analyzed the impact of LA size on the effectiveness of surgical AF ablation.Results:The successful rates of Group S and Group L in the 4 time points were respectively 72.8%vs75.3%,74.2%vs75.3%,78.9%vs77.4%,and 77.0%vs77.4%.The result of both univariate logistic regression analysis and receiver operation curve(ROC)analysis showed that there was no significant difference on cardioversion rates between Group S and L,and there is no evident correlation between size of left atrium and ablation failure.Conclusions:There was no significant difference in short-term cardioversion rate between group L and group S.Patients with LA enlargement(>60mm or>70mm)can achieve the same satisfactory results.LA size should not be a contraindication to concomitant AF ablation in cardiac surgery patients.