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A man in his 40s with a history of coronary artery disease status after percutaneous coronary intervention of the left anterior descending artery (LAD) in 2015 was admitted with a diagnosis of unstable angina. He underwent a coronary angiogram which showed a patent stent in the mid LAD (figure 1A). Contrast injection of the right coronary artery (RCA) is shown in figure 1B (online supplementary movie I).
Contributors DN and ASC were involved in the conceptualisation, supervision, revision and editing of the manuscript. PHB was involved in writing the original draft, investigation and data maintenance.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, conduct, reporting or dissemination plans of this research.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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