Abstract
A novel single-photon emission computed tomography (SPECT) camera was developed to evaluate dynamic myocardial perfusion flow. However, it is unclear whether myocardial flow reserve (MFR) derived by dynamic perfusion SPECT using the novel SPECT camera (D-SPECT) reflects the severity of coronary atherosclerosis. In the present study, we therefore examined the relationship between MFR using D-SPECT and severity of coronary lesions. The study population comprised 40 patients who underwent both a myocardial dynamic perfusion SPECT study and invasive coronary angiography. The severity of coronary atherosclerosis was evaluated using the Gensini score. All patients underwent a rest/stress SPECT imaging protocol using Tc-99m-sestamibi, and dynamic acquisition was performed. Stress and rest flow was evaluated, and the global and regional MFR was calculated. Global MFR showed a significant negative correlation with Gensini score (r = − 0.345, p = 0.037). Multiple linear regression analysis showed that only global MFR was independently related to Gensini score (p = 0.018). Regional MFR was significantly lower in regions with 90% ≤ stenotic lesions compared with regions with < 90% stenotic lesions (p = 0.009). Global MFR derived by dynamic perfusion SPECT using D-SPECT reflects the severity of coronary atherosclerosis. Further, regional MFR is modulated by severe coronary artery stenotic lesions.
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Abbreviations
- CAD:
-
Coronary artery disease
- CFR:
-
Coronary flow reserve
- ICA:
-
Invasive coronary angiography
- LAD:
-
Left anterior descending
- LCX:
-
Left circumflex
- MFR:
-
Myocardial flow reserve
- MIBI:
-
Tc-99m-sestamibi
- PCI:
-
Percutaneous coronary intervention
- PET:
-
Positron emission tomography
- RCA:
-
Right coronary artery
- SDS:
-
Summed difference score
- SPECT:
-
Single-photon emission computed tomography
- SRS:
-
Summed rest sore
- SSS:
-
Summed stress score
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Acknowledgements
This study was supported by the Sakakibara Clinical Research Grant for Promotion of Science. We thank Spectrum Dynamics for providing technical support, Makiko Kurihara for technical assistance, Dr. Shlomo Ben Heim for assistance, and Edanz Group (http://www.edanzediting.com/ac) for editing a draft of this manuscript.
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NI, YU, YS: directly participated in the planning, execution, or analysis of the study. MS, KH, RH, IT, TT: contributed to data collection. TS: supervised the study. MI: contributed to the editing of the manuscript. All authors read and approved the final manuscript.
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Nobuo Iguchi and Yuko Utanohara have received honorariums from Biosensors Japan. Yasuhiro Suzuki is a consultant of Biosensors Japan. The other authors declare no conflicts of interest regarding the publication of this paper.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was approved by the in-house ethics committee of the Sakakibara Heart Institute.
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Iguchi, N., Utanohara, Y., Suzuki, Y. et al. Myocardial flow reserve derived by dynamic perfusion single-photon emission computed tomography reflects the severity of coronary atherosclerosis. Int J Cardiovasc Imaging 34, 1493–1501 (2018). https://doi.org/10.1007/s10554-018-1358-5
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DOI: https://doi.org/10.1007/s10554-018-1358-5