A 65 year-old with history of prior ablations for regular narrow QRS short- RP tachycardia presented with recurrence of palpitations. An electrophysiological study showed long VA tachycardia with concentric atrial activation with a left ventricular origin extrastimulus delivered during His refractoriness, advancing the next ‘A’. A HRVPB can only reset an ORT if it ‘pulls in’ the local V at the ventricular insertion of an accessory pathway. As showcased in this case, erudite analysis of the pattern of perturbation of local ventricular electrograms is of paramount significance when interpreting responses to this maneuver. This concept when fortified with a heightened index of clinical suspicion for mitral annular block, anatomical knowledge of the pattern of LA-CS muscular connections, and pathway orientation, led to accurate electrophysiological diagnosis and management.