Table 1.

AAMI recommended classes for heartbeats.

Class	Symbol	Members
Normal	N	Normal beat Left bundle branch block beat Right bundle branch block beat Atrial escape beat Nodal(junctional)escape beat
Supraventricular Ectopic Beat	SVEB	Atrial premature beat Aberrated atrial premature beat Nodal (junctional) premature beat Supraventricular premature or ectopic beat (atrial or nodal)
Ventricular ectopic beat	VEB	Premature ventricular contraction Ventricular escape beat
Fusion beat	F	Fusion of ventricular and normal beat
Unknown beat	Q	/Paced beat Fusion of paced and normal beat Unclassifiable beat