Prognostic value of positron emission tomography derived myocardial flow reserve: A systematic review and meta-analysis

Ahmed Ibrahim Ahmed, Jean Michel Saad, Fares Alahdab, Yushui Han, Malek Nayfeh, Moath Said Alfawara, Mahmoud Al-Rifai, Mouaz Al-mallah

Research output: Contribution to journalReview articlepeer-review

1 Scopus citations

Abstract

BACKGROUND AND AIMS: Positron Emission Tomography (PET)-derived myocardial flow reserve (MFR) has been shown to have a role in the diagnosis and prognosis of patients with coronary artery disease (CAD). We performed a systematic review and meta-analysis to summarize the body of literature and synthesize the evidence on the prognostic role of PET-derived MFR in patients with known or suspected CAD.

METHODS: A comprehensive literature search of the Medline database from its inception to August 2023, in humans, in any language, was conducted for clinical studies examining the prognostic value of PET imaging in patients of any age, sex, and CAD status. Systematic screening and data extraction of the identified studies were followed by quantitative meta-analysis of PET-MFR's role in predicting adverse clinical events using random effect model. Studies were appraised using the modified Newcastle-Ottawa tool.

RESULTS: A total of 21 studies assessing the prognostic role of PET derived MFR in 46,815 patients with known and/or suspected CAD were included (mean (SD) age 66 (4) years, 48% women). The mean follow-up duration was 36 months (range 10-96). Cardiovascular risk factors were prevalent (73% hypertension, 35% diabetes and 67% dyslipidemia). The definition of the composite outcome varied between studies, with various combinations of mortality, non-fatal myocardial infarction, hospitalization, and coronary revascularization. Pooled impaired MFR was significantly associated with an increased risk of adverse outcomes (RR = 2.94, 95% CI 2.42-3.56, p < 0.001). Results were similar in a subgroup of patients with suspected CAD.

CONCLUSIONS: The available body of evidence shows that impaired PET-derived MFR measured using different tracers and PET systems is strongly associated with an increased risk of adverse cardiovascular events. Limitations of this review include observational nature of studies, marked heterogeneity in patient populations, inconsistency in thresholds to define abnormal MFR, and differing components for the composite outcome.

Original languageEnglish (US)
Article number117280
Pages (from-to)117280
JournalAtherosclerosis
Volume382
DOIs
StatePublished - Oct 2023

Keywords

  • Coronary artery disease
  • Positron emission tomography
  • Prognosis

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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