NCIt definition : An electrocardiographic finding of a supraventricular arrhythmia characterized by
3 or more distinct P wave morphologies with an isoelectric baseline, variable PR intervals
and no predominant atrial rhythm. The ventricular rate is typically 100-150 beats
per minute. (CDISC);
Alternative definition : CDISC: An electrocardiographic finding of a supraventricular arrhythmia characterized
by 3 or more distinct P wave morphologies with an isoelectric baseline, variable PR
intervals and no predominant atrial rhythm. The ventricular rate is typically 100-150
beats per minute.;