1st degree H block prolonged PR

2nd degree H block dropped beat

Application of electrical current to the chest to stop ventricular fibrillation

Atrial fibrillation

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

Atrial paroxysmal tachycardia-onset in middle of record

atrial premature beat

av nodal premature beat

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

complete H block

Development of arrhythmias in long QT syndrome (LQTS

Initiation of fibrillation

partial block

Pathways of impulses in atrial flutter and atrial fibrillation

Premature ventricular contractions (PVCs)

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sinoatrial nodal block

sinus arrthmia recorded cardiometer

sinus tachy

Ventricular fibrillation

Ventricular paroxysmal tachycardia