Abstract
Background
11C-hydroxyephedrine (HED) PET has been used to evaluate the myocardial sympathetic nervous system (SNS). Here we sought to establish a simultaneous approach for quantifying both myocardial blood flow (MBF) and the SNS from a single HED PET scan.
Methods
Ten controls and 13 patients with suspected cardiac disease were enrolled. The inflow rate of 11C-HED (K1) was obtained using a one-tissue-compartment model. We compared this rate with the MBF derived from 15O-H2O PET. In the controls, the relationship between K1 from 11C-HED PET and the MBF from 15O-H2O PET was linked by the Renkin-Crone model.
Results
The relationship between K1 from 11C-HED PET and the MBF from 15O-H2O PET from the controls’ data was approximated as follows: K1 = (1 − 0.891 * exp(− 0.146/MBF)) * MBF. In the validation set, the correlation coefficient demonstrated a significantly high relationship for both the whole left ventricle (r = 0.95, P < 0.001) and three coronary territories (left anterior descending artery: r = 0.96, left circumflex artery: r = 0.81, right coronary artery: r = 0.86; P < 0.001, respectively).
Conclusion
11C-HED can simultaneously estimate MBF and sympathetic nervous function without requiring an additional MBF scan for assessing mismatch areas between MBF and SNS.
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Abbreviations
- HED:
-
Hydroxyephedrine
- HR:
-
Heart rate
- K1:
-
Inflow rate of 11C-HED
- LV:
-
Left ventricle
- MBF:
-
Myocardial blood flow
- PET:
-
Positron emission tomography
- RI:
-
Retention index
- rMBFs:
-
3-coronary-regional MBFs
- ROI:
-
Region of interest
- SNS:
-
Sympathetic nervous system
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Acknowledgements
We thank Shigeo Oomagari, MSc, and Eriko Suzuki for their support to this study.
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Hiroshima, Y., Manabe, O., Naya, M. et al. Quantification of myocardial blood flow with 11C-hydroxyephedrine dynamic PET: comparison with 15O-H2O PET. J. Nucl. Cardiol. 27, 1118–1125 (2020). https://doi.org/10.1007/s12350-017-1140-4
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DOI: https://doi.org/10.1007/s12350-017-1140-4