PACs and PVCs are usually harmless but can sometimes indicate underlying heart disease. Atrial fibrillation (AFib) is common and originates within the atria, causing them to "quiver" or fibrillate.

Unlike premature atrial contractions, or PACs ... Ventricular bigeminy occurs when every other beat is a PVC. No treatment is necessary for PVCs. If symptomatic, beta-blockers or antiarrhythmic ...

Medically reviewed by Yasmine S. Ali, MD, MSCI Bigeminy is an irregular heart rhythm where every normal beat is followed by an abnormal one, often due to premature ventricular contractions (PVCs). It ...