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. 2019 Feb 12;18:15. doi: 10.1186/s12938-019-0630-9

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Two electrocardiograms (ECGs) of a case patient from the heart failure database (HFDB). The first ECG was made at baseline (a) and the second during follow-up (b). Both ECGs are standard 10-s 12-lead ECGs displayed according to the standard ECG display format. For each panel, the upper three traces show, multiplexed, 2.5 s of the four lead groups I/II/III, aVR/aVL/aVF, V1/V2/V3 and V4/V5/V6; instead, the longer trace displays continuously lead II, specifically used for rhythm analysis. A selection of measurements made by the LEADS program [13] is displayed in the upper part of each ECG page. See text for the clinical context and interpretation of these ECGs