Figure 1
A) Multipolar catheter (#) positioned around the tricuspid valve (TV) showed a counter-clockwise activation of the right atrium (RA) (cycle length 268 ms) with 2:1 atrioventricular conduction. The ablation catheter (*) positioned at the RA free wall recorded a slower atrial rhythm (cycle length 698 ms). B) Atrial flutter (AFL) terminated during ablation followed by an asystolic episode of 3268 ms after which sinus rhythm (SR) resumed. During asystole, SR in the native RA continued, indicating that there is no atrio-atrial conduction.
