Figure 5

ROC curves for predictors of outcome after epicardial HIFU ablation. (A) ROC curve for preoperative ANP level and (B) ROC curves for LAD and LA area in long standing persistent AF. Baseline ANP level is the most useful predictor of heart rhythm at 6 months after HIFU ablation in longstanding persistent AF; ROC: receiver operating characteristic; ANP: atrial natriuretic peptide; LAD: left atrial diameter; LA: left atrium; AUC- area under the curve.