• The performance of c3 (by Layer 3) is promoted from c2 (by Layer 2). Using 72-RRI as attributes, the C} classification could achieve the accuracy of up to 100% in this experiment better than using 2-RRI.
• Although the performance of the c4 case is obviously affected by c3’s high accuracy for 18-RRI, 36-RRI and 72-RRI, the classification of by 2-RRI or 9-RRI has the difference between the c3 and c4 cases. The difference shows the detection of the 3 arrhythmias (‘J’, ‘j’, ‘N’), which cannot be detected by c3, but can be detected by Cl or c4. The type ‘N’ denotes normal. Overall, c4 could maintain high classification accuracy and possess the ability to find other arrhythmias which are new for personal health record.