Fig. 2
From: Delayed management of atrial lead dislodgment after pacemaker implantation: a case report
Electrocardiogram before and after new atrial lead implantation. a Before new atrial lead implantation, VVI pacing showed a large percent of ventricular pacing (1st–4th, 6th, 8th, 10th QRS) with less atrial deflection followed by intrinsic ventricular deflection (5th, 7th, and 9th–11th QRS). b After new atrial lead implantation, each atrial deflection was followed by intrinsic ventricular deflection, shown as AAI pacing mode