Transthoracic echocardiographic and artificial intelligence-enabled electrocardiography predictors of atrial arrhythmia recurrence after surgical ablation.

Despite moderate discrimination (C-index ∼0.67), the model achieved a 3-year Brier score of 0.21, reflecting excellent calibration, and demonstrated highly significant survival separation across predicted risk quartiles (log-rank χ 2 = 304; P < 10 -60 ).

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