3 Lead ECG: Sinus bracycardia (~40bpm)

3 Lead ECG: Sinus rhythm with ventricular couplets

3 Lead ECG: Sinus Rhythm with Premature Atrial Contractions (PAC)

3 Lead ECG: Sinus arrhythmia with premature junctional contraction (PJC)

3 Lead ECG: Sinus rhythm with 1st degree AV block

3 Lead ECG: Ventricular escape rhythm