1. Normal 30 BPM 
2. Normal 80 BPM
3. Normal 220 
4. Normal Pediatric with QRS of 40 ms
5. Frequent multifocal rhythm
6. Ventricular Tachycardia
7. Quadrigeminy 
8. Bigeminy
9. Trigeminy
10. Supraventricular tachycardia
11. Ventricular Fibrillation
12. Nodal Rhythm
13. Asystole
14. NSR with irregular rhythm
15. Atrial Tachycardia
16. Atrial flutter      
17. Coarse atrial fibrillation
18. Fine atrial fibrillation
19. SVTA onset following a few seconds of NSR      
20. 1st degree heart block      
21. 2nd degree heart block (Mobitz II, 2:1 conduction)      
22. 3rd degree heart block      
23. Pacemaker
24. Left bundle branch block
25. ST elevation of 0.6 mV
26. ST elevation of 0.2 mV
27. ST depression of 0.2 mV
28. ST depression of 0.6 mV (in lead I)
29. Nonfunction Pacemaker
30. Pacemaker with occasional sinus beats
31. Pacemaker rhytm with frequent sinus beats
32. Atrial-Ventricular sequential pacemaker rhythm
33. 50 Hz artifact
34. 60 Hz artifact
35. Muscle artifact
36. Baseline wandering artifact
37. Respiration artifact
38. Normal 80 BPM with RA and LA swapped Electrodes
39. Normal 80 BPM with RA and RL swapped Electrodes
