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. 2022 Jan 28;8:821988. doi: 10.3389/fcvm.2021.821988

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Copyright © 2022 Yang, Sun, Guo, Zhou, Liu, Wei, Xie and Ma.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A), ABL was at site 1, which locates at a superior part above the real “His” with far-field “His” potential recorded; (B), Site 2 (true para-hisian): the site with near-field “His” potential; (C), Site 3: inferior part below site 2 with far-field “His” potential recorded; (D), RMS: the site bounded anteriorly by His recording location and posteriorly by the roof of CS ostium without “His” potential recorded; (E), left anterior oblique view of the tricuspid annulus and right anterior septum was divided into three subgroups. Real “His” was labeled with yellow dots and far-field “His” was marked with brown dots. ABL, ablation catheter; RMS, right midseptal.