Abnormal EKG reading | Figure 1

Abnormal EKG reading

Called for a 70 y/o female with shortness of breath and chest pain. Sitting in tripod position on arrival, not alert. CPAP applied resulting in relief of respiratory symptoms. Oddity of the case is her cardiac rhythm. 76 bpm, with every two beats marching out with each other but a longer pause between each group of QRS complex. Long PR interval, wider QRS but not resembling ventricular beats. Looks like "bigeminal PJC" if that's a type of beat.

Hx of open heart for "CHF issues" but no Hx of AMI.

It does not look like a 2nd or 3rd degree block and all QRS produce a pulse.

Any other ideas what it could be?