Premature Ventricular Contraction

Rhythm

Irregular

Rate

Based on underlying

P-Waves

Ectopic will have an absent P wave

PRI

Absent for ectopic

QRS

> 0.12 seconds, wide and bizarre

Pacer Site

Single irritable focus in the ventricle creates unifocal PVC's. Multifocal PVC's are created by more than one irritable site.