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. 2017 Feb 27;38(4):754–761. doi: 10.1007/s00246-017-1575-z

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© The Author(s) 2017

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.

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Fig. 8 — Rest heart rate (rest HR) in patients in I/II WHO-FC in comparison to patients in III/IV WHO-FC