Ventricular arrhythmia Ventricular extrasystoles SNOMEDCT_US:17338001 human_phenotype SNOMEDCT_US:251175005 Premature ventricular contractions (PVC) or ventricular extrasystoles are premature contractions of the heart that arise in response to an impulse in the ventricles rather than the normal impulse from the sinoatrial (SA) node. A premature ventricular contraction may be perceived as a skipped beat or as palpitations. Missed heartbeat Skipped heartbeat Premature ventricular contractions Extra heart beat HP:0006682 MSH:D018879 HP:0006678 UMLS:C0151636