See the AVNRT ECG Review for more details. Treatment for atrioventricular nodal reentry tachycardia includes vagal maneuvers, which can frequently terminate the arrhythmia. Also, AV blocking ...
This is considered a "short RP tachycardia ... the normal AV nodal conduction pathway since it will no longer be refractory and a reentrant circuit will be created. See the ECG strip below ...