1. 1st degree H block prolonged PR

2. 2nd degree H block dropped beat

3. Application of electrical current to the chest to stop ventricular fibrillation

4. Atrial fibrillation

5. Atrial flutter-2 1 and 3 1 atrial to ventricle rhythm

6. Atrial paroxysmal tachycardia-onset in middle of record

7. atrial premature beat

8. av nodal premature beat

9. Circus movement, showing annihilation of the impulse in the short pathway and continued propagation of the impulse in the long pathway.

10. complete H block

11. Development of arrhythmias in long QT syndrome (LQTS

12. Initiation of fibrillation

13. partial block

14. Pathways of impulses in atrial flutter and atrial fibrillation

15. Premature ventricular contractions (PVCs)

16. showimage

17. sinoatrial nodal block

18. sinus arrthmia recorded cardiometer

19. sinus tachy

20. Ventricular fibrillation

21. Ventricular paroxysmal tachycardia