Medically reviewed by Yasmine S. Ali, MD, MSCI Bigeminy is an irregular heart rhythm where every normal beat is followed by ...

Unlike premature atrial contractions, or PACs, usually narrow-complexed because ... Ventricular bigeminy occurs when every other beat is a PVC. No treatment is necessary for PVCs.

If a premature atrial contraction, or PAC, or less commonly a premature ventricular contraction, or PVC, occurs at the right time, the normal conduction pathway will still be refractory ...