Successful Ablation for Atrial Tachycardia Originated from Sinus Venosa with Tachycardia-Induced Cardiomyopathy

Figure 3

(a) Double potentials were recorded and preceded the onset of P wave by 80 ms. (b) Catheter position at RF site. RF catheter was located at posterior medial wall. RF: ablation catheter; CS: coronary sinus; prox: proximal; dist: distal. (c) The noncontact unipolar electrogram revealed a QS pattern of the origin (red allow). The length of preferential pathway (blue arrow) was 8 mm. BO = breakout site of AT.

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