Arrhythmic

a.

1.

(Med.) Being without rhythm or regularity, as the pulse.

Adj.	1.	arrhythmic - without regard for rhythm Synonyms: arrhythmical
	2.	arrhythmic - not having a steady rhythm; "an arrhythmic heartbeat" Synonyms: jerking, jerky, unsteady

arrhythmical, unrhythmic, unrhythmical