Premature Contraction Detection (PC)
A premature contraction can originate in your heart’s upper (atria) or lower (ventricles) chambers. With this “extra” beat, a pause usually causes your next normal heartbeat to be more forceful. Premature beats that start in your heart’s upper chambers are premature atrial contractions, or PACs. Those that start in the lower chambers are premature ventricular contractions, or PVCs. Infrequently, premature contractions can be caused by disease or injury to the heart.