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Figure 6 Tracings are ECG leads I, aVF, V₁, and intracardiac electrogram recorded from a mapping catheter in the non-coronary AS (non-coro AS 1 to 2, non-coro AS 3 to 4, non-coro AS uni), a catheter at the HBE, a catheter within the CS, and a catheter at the RVA during RF delivery in a patient with FAT. Note that FAT is successfully terminated after 1.4 s during the first RF application. RF = radiofrequency; other abbreviations as in preceding figures.