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Receiver operating characteristic-curve sub-analysis of left atrial measurements for identifying LAA thrombus, LAA low flow velocities or at least one of one of these parameters, in patients under previous oral anticoagulation. Legend: AP – anteroposterior; AUC – area under the curve; CI – confidence interval; LA – left atrial; LAA – left atrial appendage; p – significance level; 4C – 4-chamber; 1P – single-plane; 2P – biplane.
