Ablation from the non-coronary aortic cusp is a safe and effective alternative for treating focal atrial tachycardia originating near the His-bundle region when right atrial ablation poses a risk of AV nodal injury.
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May warrant consideration for refractory perinodal tachycardia to avoid AV nodal risk; hypothesis-generating from single-case data.
Yamashita et al. (2010) studied this question.