Test performance of the combined beat classifier (Stage 1 + Stage 2) on MIT-BIH database.

Different Stage 2 classification methods are compared–The maximal performance of stepwise Cluster (step 30), Fuzzy (step 72), LDA (step 142) models with optimal number of steps vs. CT models with an equivalent number of final nodes. The maximal accuracy of the CT final solution (221 nodes) is also reported. Sp is calculated for SVB-class; Se, PPV are calculated for VB-class, as well as only for V-beats (part of VB-class), the latter performance being usually reported in other published heartbeat classifiers.