ROC and precision-recall curves. a, Examples of ROC curves calculated at the sequence level for atrial fibrillation (AF), trigeminy, and AVB. b, Examples of precision-recall curves calculated at the sequence level for atrial fibrillation, trigeminy, and AVB. Individual cardiologist performance is indicated by the red crosses and averaged cardiologist performance is indicated by the green dot. The line represents the ROC (a) or precision-recall curve (b) achieved by the DNN model. n = 7,544 where each of the 328 30-s ECGs received 23 sequence-level predictions.