A New Electrocardiographic Algorithm Using Retrograde P Waves for Differentiating Atrioventricular Node Reentrant Tachycardia From Atrioventricular Reciprocating Tachycardia Mediated by Concealed Accessory Pathway

Objectives. The purpose of this study was to use an electrocardiographic (ECG) algorithm, derived from the results of radiofrequency ablation, to discriminate atrioventricular node reentrant tachycardia (AVNRT) from atrioventricular reciprocating tachycardia (AVRT) and to localize a concealed accessory pathway, prospectively.