<unk> s <unk> s) are common and typically benign premature beats characterized by an abnormal early P wave within a cardiac cycle. Less commonly, they can precipitate atrial fibrillation, atrial flutter, or SVT.
Premature atrial contraction
Arrhythmias:
Premature ventricular contraction
Narrow-complex tachycardias
Wandering atrial pacemaker
Wide-complex tachycardias
Premature junctional contraction
AV blocks