A group of cardiac arrhythmias in which the cardiac contractions are not initiated at the SINOATRIAL NODE. They include both atrial and ventricular premature beats, and are also known as extra or ectopic heartbeats. Their frequency is increased in heart diseases.
Also Known As:
Extrasystoles; Extrasystole; Premature Beats; Cardiac Complexes, Premature; Cardiac Complex, Premature; Premature Cardiac Complex; Beat, Premature; Beats, Premature; Complexes, Premature Cardiac; Ectopic Heartbeat; Heartbeat, Ectopic; Heartbeats, Ectopic; Premature Beat; Premature Cardiac Complices; Ectopic Heartbeats