Available online 13 November 2025, 154156

We describe an unusual case of focal atrial tachycardia (FAT) from the left inferior pulmonary vein (PV) in a 12- year old boy treated successfully by high power short duration (HPSD) ablation. The patient was referred to our center for ablation of incessant FAT with recurrent transient degeneration into atrial fibrillation. The electrophysiological study revealed FAT with a micro-reentrant like activation from the left inferior PV. To reduce the risk of complications to surrounding structures, isolation of the left pulmonary veins was performed using HPSD (65 W, 6–15 s) ablation. During a follow-up period of 12 months, the patient remained in stable sinus rhythm.

Focal atrial tachycardia

Radiofrequency catheter ablation

Pulmonary veins

High power short duration ablation

© 2025 The Author(s). Published by Elsevier Inc.