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. 2024 Jan 8;11:5. doi: 10.1186/s40658-023-00606-y

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© The Author(s) 2024

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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Fig. 8 — A A 61-year-old male patient. ESV = 21 mL calculated by the SD protocol, and the LVEFs calculated using the SD and SH protocols were 69% and 62%, respectively. Echo showed an EDV of 97 mL, an ESV of 35 mL, and a LVEF of 63% by using Teichholz’s formula. B A 63-year-old female patient. ESV = 8 mL calculated using the SD protocol, and the LVEFs calculated using the SD and SH protocols were 84% and 81%, respectively. Echo showed an EDV of 70 mL, an ESV of 22 mL, and a LVEF of 65%