NCIt definition : A disorder characterized by an electrocardiographic finding of an organized, regular
atrial rhythm with atrial rate of 240-340 beats per minute. Multiple P waves typically
appear in the inferior leads in a saw tooth-like pattern between the QRS complexes.
(CDISC);
Alternative definition : NICHD: A rapid heart rate, associated with a regular rhythm, that is caused by abnormal
electrical activity within the atria.; CTCAE: A disorder characterized by a dysrhythmia with organized rhythmic atrial contractions
with a rate of 200-300 beats per minute. The rhythm disturbance originates in the
atria.;