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. 2020 Oct 5;10:16478. doi: 10.1038/s41598-020-73359-8

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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ECG of II6(A), II8(B), II10(C), III5(D), III6(E). II6(A) showed significant low amplitude of QRS in all leads, abnormal T waves in V2–V6, and complete right bundle branch block; II8(B) and II10(C) showed a similar low potential in all leads, the T waves in II, III, avF, V4–V6 are inversed in II8 and biphasic in II10, respectively; III5(D) showed relatively flat T waves in II, III, aVF; III6(E) is completely normal in ECG.