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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Front view of the positions and orientations of electrode pairs 10/17 and 9/16 (blue arrows). The red diamonds indicate the electrode locations of precordial leads V1–V6 of the standard 12-lead ECG system.