Utility of dual-chamber Electrogram-based pace mapping in a teenager with a focal atrial tachycardia, low inducibility, and indeterminate earliest excitation site.

A 17-year-old patient presented with frequent palpitations, where the tachycardia was not sustained and could not be induced, making it impossible to pinpoint the earliest activation site using the activation map. However, by utilizing a dual-chamber electrogram-based pace mapping technique, we successfully identified the origin and achieved effective treatment.