VPCs (also called ventricular premature contractions, ventricular premature ... Although this group observed VPC runs and bigeminy, most VPCs were single and occurred sporadically 12.

A premature ventricular contraction occurs when a focus in the ventricle generates an action potential before the next scheduled sinoatrial nodal action potential. Ventricular bigeminy occurs when ...

A premature ventricular contraction occurs when a focus in the ... P-P intervals after the last normal sinus beat. Ventricular bigeminy occurs when every other beat is a PVC.