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Regional rates of myocardial fatty acid metabolism: comparison with coronary angiography and ventriculography

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Abstract

In 50 patients, 1 mCi123I phenylpentadecanoic acid (IPPA) was injected at peak ergometric stress and 1500 frames were acquired (1 frame/s) with a high count rate gamma camera. Parametric images of rates of decrease and increase for different time intervals after stress were compared with coronary angiography and LV ventriculography, separately evaluating the 3 main coronary territories: 18/150 territories supplied by normal coronaries presented rather homogeneous regional clearing rates, whereas a gradual decrease in clearing rates towards the end of the territory (frequently with peripheral defects) was seen in all 87/150 territories with significant coronary narrowing. In local correspondence to clearing defects, initial IPPA accumulations could be observed with later onset of clearing between 10 and 25 min. 44/150 territories presented abnormal clearing rates, mostly with a patchy pattern, with normal coronary anatomy, but all except one had LV dysfunction and a clinical diagnosis of Cadomyopathy, diabetes mellitus or hypertensive disease. Twenty four of the 41 patients with CAD had, in correspondence to a prior myocardial infarction, minimum or missing metabolic activity frequently in circumscribed zones, partly separated by bridges of still viable tissue with preserved but reduced clearing rates.

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Schad, N., Wagner, R.K., Hallermeier, J. et al. Regional rates of myocardial fatty acid metabolism: comparison with coronary angiography and ventriculography. Eur J Nucl Med 16, 205–212 (1990). https://doi.org/10.1007/BF00842770

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  • DOI: https://doi.org/10.1007/BF00842770

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