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. 2018 Sep 28;108(5):468–476. doi: 10.1007/s00392-018-1376-2

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© The Author(s) 2018

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. 1 — Study equipment. Echocardiography machine: GE Vivid E9, Hatfield, Hertfordshire, UK. Non-invasive haemodynamic monitoring device (Nexfin, BMeye, Amsterdam, The Netherlands) with an inflatable finger cuff was attached to the mid finger of participant’s left hand. Hydrotherapy pool (maintained at a temperature between 33 and 35 °C)