Abstract
Quantitative myocardial perfusion by positron emission tomography (PET) is the optimal guide for diagnosis and management or interventions for obstructive or non-obstructive coronary artery disease (CAD) for the following reasons documented in this chapter: PET guided elective revascularization in chronic CAD reduces death and myocardial infarction (MI) by 54% compared to medical treatment alone whereas FFR or FFRct or angiogram guided interventions show no reduced death or MI compared to medical treatment. In a large cohort with high prevalence of CAD, PET excludes 60–80% of elective coronary angiograms as unnecessary for mild or moderate, low risk CAD not needing angiogram versus identifying patients with CAD severity getting PCI or CABG in 78% of PET guided angiograms. By comparison, for FFRct ≤0.8, only 38% have pressure derived FFR ≤0.8 at angiogram, hence FFRct is false + in 62% of + FFRct cases. On head to head comparison with analysis for intent to diagnose, PET is superior to FFRct on a per patient and per artery analysis due FFRct variability of ±25% for predicting FFR ≤0.8 and due to 17% FFRct failures of acquiring useable data versus 0.7% failed data acquisition for PET that has ±10% variability. In addition to this data, PET quantitative perfusion is the accepted Gold Standard of physiologic CAD severity since: (i) PET is the reference standard to which FFR was compared for validation and for the extensive PET literature since validating FFR. (ii) Quantitative myocardial perfusion explains symptoms and abnormal physiologic function broadly in all coronary pathophysiologies to guide management. (iii) Quantitative myocardial perfusion by PET has mainstream status in cardiology texts including Hurst’s The Heart and The Atlas of Nuclear Cardiology (in press).
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Financial Support and Relationships with Industry
Research supported by internal funds of the Weatherhead PET Center.
NPJ received institutional licensing and consulting agreement with Boston Scientific for the smart minimum FFR algorithm; received significant institutional research support from St. Jude Medical (CONTRAST, NCT02184117) and Philips Volcano Corporation (DEFINE-FLOW, NCT02328820) for studies using intracoronary pressure and flow sensors; and has a patent pending on diagnostic methods for quantifying aortic stenosis and TAVI physiology.
KLG receives internal funding from the Weatherhead PET Center for Preventing and Reversing Atherosclerosis and is the 510(k) applicant for FDA approved HeartSee K171303 PET software. To avoid any conflict of interest, KLG has assigned any royalties to the University of Texas for research or student scholarships; has no consulting, speakers, or board agreements; and receives no funding from PET-related or other corporate entities.
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Gould, K.L., Nguyen, T.T., Kirkeeide, R., Johnson, N.P. (2021). Coronary Physiology and Quantitative Myocardial Perfusion. In: Dilsizian, V., Narula, J. (eds) Atlas of Nuclear Cardiology. Springer, Cham. https://doi.org/10.1007/978-3-030-49885-6_6
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