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The clinical value of myocardial blood flow measurement

Paolo G Camici1, Ornella E Rimoldi

  • 1Medical Research Council, Clinical Sciences Centre and National Heart and Lung Institute, Imperial College, London, United Kingdom. paolo.camici@csc.mrc.ac.uk

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|June 16, 2009
PubMed

Insights

Positron emission tomography (PET) accurately measures myocardial blood flow, revealing coronary microcirculation issues even without significant artery blockages. This technique offers vital diagnostic insights and can track treatment effectiveness.

Area of Science:

  • Cardiovascular imaging
  • Nuclear medicine
  • Physiology

Background:

  • Coronary artery disease (CAD) can manifest with microcirculation dysfunction.
  • Myocardial perfusion abnormalities may exist despite normal epicardial arteries.
  • Early detection of microvascular disease is crucial for patient outcomes.

Purpose of the Study:

  • To highlight the diagnostic utility of Positron Emission Tomography (PET) in assessing myocardial blood flow.
  • To emphasize PET's role in evaluating coronary microcirculation function.
  • To establish PET-derived myocardial blood flow as a surrogate endpoint for treatment efficacy.

Main Methods:

  • Utilizing Positron Emission Tomography (PET) for quantitative assessment of regional myocardial blood flow (MBF).
  • Measuring MBF in milliliters per minute per gram of tissue.
  • Correlating PET findings with coronary risk factors and myocardial diseases.

Main Results:

  • PET provides robust and reproducible measurements of myocardial blood flow.
  • Abnormalities in global myocardial perfusion are detectable via PET in individuals with risk factors or myocardial diseases.
  • PET identifies perfusion defects in the absence of significant epicardial coronary artery stenosis.

Conclusions:

  • PET offers unique pathophysiologic and diagnostic information on coronary macro- and microcirculation.
  • Measurement of myocardial blood flow using PET is critical for diagnosing microcirculation dysfunction.
  • Quantitative MBF assessment via PET serves as a valuable surrogate endpoint for therapeutic interventions.

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