Catheter ablation of typical right atrial flutter in a 20‐day‐old neonate with tachycardiomyopathy

FIGURE 1. Atrial flutter 2:1 AVN conduction. Heart rate = 220 bpm and 2:1 atrioventricular conduction atrial flutter; AVN, atrioventricular node.

FIGURE 2. Positioning of electrodes and patches on the newborn's body. 3D system and radiofrequency and ground patches on the newborn.

FIGURE 3. Right‐side entrainment with a shorter PPI. PPI, postpacing interval.

FIGURE 4. Left‐side entrainment via atrial septal defect showing a long PPI. PPI, postpacing interval.

FIGURE 5. Termination of AFL during ablation showing return to sinus rhythm. (A) The lesion set on the cavotricuspid isthmus and on the tracing we note the return to sinus rhythm with the ablation line. (B) Activation map of the flutter with counterclockwise activation around the tricuspid valve. AFL, Atrial flutter.

FIGURE 6. EKG revealing sinus rhythm maintenance. EKG, Electrocardiogram.