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. 2017 Jan 26;8:14. doi: 10.3389/fphys.2017.00014

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Copyright © 2017 Nagase, Tanaka, Morita, Nakagawa, Wada, Murakami, Nishii, Nakamura, Ito, Ohe and Kusano.

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) or licensor 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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Epicardial/endocardial electrograms in BrS patients (patients 1-3). ECG lead II and unipolar (Epi 2 and Endo 2) and bipolar (Epi 2-3 and Endo 2-3) electrograms on the LV epicardium (Epi 2 and Epi 2-3) and endocardium (Endo 2 and Endo 2-3) in patients 1, 2, and 3 (A–C, respectively). Prominent J waves were detected with unipolar recording (arrows) and potentials after the QRS complex were detected with bipolar recording (arrow heads) at the epicardium but not at the endocardium in all patients.