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. 2024 Nov 18;14:28393. doi: 10.1038/s41598-024-79896-w

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. 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-nc-nd/4.0/.

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Fig. 5 — Degree of hyperemic DPV increase according to pre-PCI FFR quartiles and pre-PCI STDE-CFC categories in lesions with low and high pre-PCI FFR settings. Vessels are divided into two groups by the median value of pre-PCI FFR (0.69). Pre-PCI STDE-CFC categorization maintained the ability to discriminate lesions, which potentially achieve higher-level hyperemic DPV increase (> 50%) in both groups, while FFR lost discriminating ability in higher FFR vessels. CFC, coronary flow capacity; DPV, diastolic peak velocity; FFR, fractional flow reserve; STDE, stress transthoracic Doppler echocardiography; PCI, percutaneous coronary intervention.