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Figure 2 Successful cryo-ablation (CA) with His potential in tachycardia of right anteroseptal (RAS) pathway (Patient #25). The large increase in noise from the ablation catheter is caused by the formation of the ice ball and cryo-adhesion. (A) Electrocardiogram at the initiation of cryo-mapping (CM) during tachycardia with the His potential seen in the ablation catheter. (B) Electrocardiogram at the termination of CA shows sinus rhythm and His potential is seen in ablation catheter. (C) Electrocardiogram shows the termination of tachycardia during CM. The supraventricular tachycardia was terminated with ventriculoatrial block just 0.6 s before reaching –25°C and 47.4 s from the initiation of CM. ABL = ablation; CS = coronary sinus.
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