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. 2018 Nov 15;93(6):1059–1066. doi: 10.1002/ccd.27945

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© 2018 The Authors. Catheterization and Cardiovascular Interventions published by Wiley Periodicals, Inc.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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MBF restoration after percutaneous revascularization of a CTO and a non‐CTO lesion. (1A) MBF during hyperemia was severely reduced in the myocardial area distal of a CTO in the RCA (arrow: proximal cap, arrowhead: Distal cap) despite collateral supply by septal collaterals and a very well‐developed epicardial collateral arising from the LCx. (1B) successful percutaneous revascularization of the CTO (arrow) resulted in restoration of hyperemic MBF. (2A) a severe non‐CTO lesion in the LAD with an FFR of 0.18 (arrow) induced severely decreased hyperemic MBF, which recovered after successful PCI (2B, arrow). Abbreviations: CTO, chronic coronary total occlusion; FFR, fractional flow reserve; LCx, left circumflex coronary artery; MBF, myocardial blood flow; PCI, percutaneous coronary intervention; RCA, right coronary artery [Color figure can be viewed at wileyonlinelibrary.com]