Reliability and Reproducibility of Absolute Myocardial Blood Flow: Does It Depend on the PET/CT Technology, the Vasodilator, and/or the Software?

K. Lance Gould, Linh Bui, Danai Kitkungvan, Monica B. Patel

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations

Abstract

Purpose of Review: The COURAGE and ISCHEMIA trials showed no reduced mortality after revascularization compared to medical treatment. Is this lack of benefit due to revascularization having no benefit regardless of CAD severity or to suboptimal patient selection due to non-quantitative cardiac imaging? Recent Findings: Comprehensive, integrated, myocardial perfusion quantified by regional pixel distribution of coronary flow capacity (CFC) is the final common expression of objective CAD severity for which revascularization reduces mortality. Current lack of revascularization benefit derives from narrow thinking focused on measuring one isolated aspect of coronary characteristics, such as angiogram stenosis, its fractional flow reserve (FFR), anatomic FFR simulations, relative stress imaging, absolute stress ml/min/g or coronary flow reserve (CFR) alone, or even more narrowly on global CFR or fixed regions of interest in assumed coronary artery distributions, or in arbitrary 17 segments on bull’s-eye displays, rather than regional pixel distribution of perfusion metrics as they actually are in an individual. Summary: Comprehensive integration of all quantitative perfusion metrics per regional pixel into coronary flow capacity guides artery-specific interventions for reduced mortality in non-acute CAD but requires addressing the methodologic questions in the title.

Original languageEnglish (US)
Article number12
JournalCurrent Cardiology Reports
Volume23
Issue number3
DOIs
StatePublished - Mar 2021
Externally publishedYes

Keywords

  • Cardiac positron emission tomography
  • Coronary artery disease
  • Coronary flow capacity
  • Coronary flow reserve
  • Myocardial perfusion
  • Revascularization

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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