A. Every alternate P wave (orange star) falls in the blanking
period. PVARP represents post ventricular atrial refractory period;
PVAB, post ventricular atrial blanking; AVD, atrioventricular delay; Vp,
ventricular paced; As, atrial sensed. B. Depiction of ECG lead
II in our patient, where blanked flutter search algorithm increased the
PVARP for one cycle leading to the dropped beat. AS indicates atrial
sensed event; VP, ventricular paced; AR, atrial refractory; PVARP, post
ventricular atrial refractory period.