12 Lead ECG: Old inferior infarct with Q waves and PVCs

12 Lead ECG: Ventricular bigeminy

12 Lead ECG: Normal sinus rhythm (NSR) with PVCs ~66 bpm

3 Lead ECG: Sinus rhythm with ventricular couplets

3 Lead ECG: junctional escape rhythm

3 Lead ECG: Sinus rhythm with unifocal premature ventricular contractions (PVCs)