What is AVRT?

AV reentrant tachycardia (AVRT) is a type of heart rhythm disorder that begins in the upper chambers of the heart (atria) and travels through an extra abnormal pathway, called an accessory pathway or bypass tract. An accessory pathway is an extra band of tissue/fibers that connect the atria to the ventricles.

General characteristics of AVRT include an abnormally fast heart, which can be as high as 220-320 bpm in younger children.

Although AVRT is not usually dangerous, if left untreated it can affect the heart’s ability to pump normally.