• The PVC occurs between two regular complexes; it may appear sandwiched between two normal beats. There is no compensatory pause
• An interpolated PVC does not interfere with the normal cardiac cycle, producing no pause or rhythm disturbance.

Rate: Depends on rate of underlying rhythm

Rhythm: Irregular whenever a PVC occurs

P Waves: None associated with the PVC

PR Interval: None associated with the PVC

QRS: Wide (greater than 0.10 sec), bizarre appearance