AV Nodal Re-entrant Tachycardia
(AVNRT)This type of abnormal rhythm arises from malfunctioning of the AV node. In most people, the AV node conducts impulses along a single pathway. In AVNRT, a second conducting pathway arises, confusing the electrical signals traveling from atria to ventricles. As a result, both the atria and ventricles beat at the same time instead of in sequence.
This creates a fast heart rate — 120-250 beats per minute. Although the heartbeat is typically regular, rather than erratic, the heart is not AV node reentry
