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Cardiac PET: Microcirculation and substrate transport in normal and diseased human myocardium

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Abstract

The development and validation of quantitative assay techniques for the noninvasive study of human myocardium has opened up new avenues for the study of the normal and diseased human heart’s physiology. Measurements of regional myocardial blood flow, which delineates nutrient rather than coronary blood flow, has enabled the exploration of the coronary microcirculatory physiology under normal and abnormal conditions. It permits the study of pharmacologic effects and of cardiovascular disease on the coronary resistance and capillary perfusion. If combined with metabolic assay techniques, the transcapillary exchange of substrates in oxygen can be quantified and changes imposed by physiologic interventions and substrate metabolism being measured. These study approaches further serve to characterize changes in response to reductions in coronary blood flow as well as altered states of potentially reversible contractile function. It is anticipated that further studies with PET will clarify at the microcirculatory level the changes associated with ischemia, post-ischemic stunning and myocardial hibernation. Further, it offers the possibility to measure potentially beneficial effects of therapeutic interventions or, alternatively, to provide a rationale for novel therapeutic approaches.

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Authors and Affiliations

  1. Division of Nuclear Medicine, Department of Molecular and Medical Pharmacology, UCLA School of Medicine, USA

    Heinrich R. Schelbert

  2. Laboratory of Structural Biology & Molecular Medicine, University of California, USA

    Heinrich R. Schelbert

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  1. Heinrich R. Schelbert
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Additional information

Operated for the U.S. Department of Energy by the University of California under Contract #DE-AC03-76-5F00012. This work was supported in part by the Director of the Office of Energy Research, Office of Health and Environmental Research, Washington D.C., by Research Grants #HL 29845 and #HL 33177, National Institutes of Health, Bethesda, MD and by an Investigative Group Award by the Greater Los Angeles Affiliate of the American Heart Association, Los Angeles, CA.

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Schelbert, H.R. Cardiac PET: Microcirculation and substrate transport in normal and diseased human myocardium. Ann Nucl Med 8, 91–100 (1994). https://doi.org/10.1007/BF03165013

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