American Allied Health National Certification Practice Exam 2026 – Complete Preparation Guide

Multifocal PVCs, or premature ventricular contractions, are characterized by originating from multiple locations within the ventricles of the heart. This means that each PVC has a different electrical impulse that leads to a variation in its appearance on an ECG. This variability is a key feature that distinguishes multifocal PVCs from other types, such as unifocal PVCs, which arise from a single location and exhibit a consistent appearance. The presence of multifocal PVCs can indicate a more complex underlying cardiac issue, as they suggest multiple ectopic foci are triggering these premature contractions. Consequently, the identification of multifocal PVCs can be clinically significant when assessing a patient's cardiovascular health.