Background: Though AVRT is common as an outpatient it is uncommon in the post-operative setting. It is a reentrant rhythm, so generally exhibits a sudden onset and sudden termination with rates in excess of 200bpm.
AEG: AVRT demonstrates a 1:1 atrial to ventricular ratio with the atrial signal typically located just following the QRS complex in the early T wave. In comparison to AVNRT, the VA time is slightly longer, often >70msec from the onset of the ventricular to the atrial signal (or 2 small boxes on a standard ECG). AVRT is AV nodal dependent.
Adenosine: As AVRT is AV nodal dependent, it can be terminated with adenosine.
Atrial Overdrive Pacing: AVRT can be overdrive pace terminated.