Abstract. Background: Multiform premature ventricular complexes (PVCs) are common electrocardiographic abnormalities in patients with structurally normal hearts. However, the prognostic value of these complexes remains unclear. This study aimed to clarify the role of PVC polymorphism in predicting adverse outcomes.

Are PVCs harmful?

Generally, PVCs cause dangerous symptoms only if the person has another heart problem. For example, they might happen in someone whose ventricle already squeezes poorly. So if you have heart failure, you may notice more symptoms, like shortness of breath.

Are occasional PVCs bad?

Occasional PVC heart beats are common and in general not of concern.