Page 465 - ECG dr shamol_Slide

AV nodal re-entry tachycardia:

Rate 140–200 beats per minute.

It is initiated by an atrial premature beat. Re-entry rhythm originates in the AV
nodal area and spreads simultaneously up to the atria and down to the ventricles,

as a result the P waves are usually hidden in the QRS complex because the atria

and the ventricles are activated simultaneously.