Abstract
Background
Previous studies have demonstrated left ventricular mechanical dyssynchrony (LVMD) in patients with severe coronary artery disease (CAD) with ≥ 70% stenosis. The aim of this study was to evaluate the clinical usefulness of stress/rest LVMD in the diagnosis of CAD with ≥ 50% stenosis using dipyridamole thallium-201 (Tl-201) myocardial perfusion imaging (MPI) with a cadmium-zinc-telluride camera.
Methods and Results
A total of 476 patients without known CAD who underwent dipyridamole Tl-201 MPI and coronary angiography within 6 months were retrospectively reviewed. LVMD parameters including phase standard deviation and phase histogram bandwidth, phase skewness and phase kurtosis, as well as myocardial perfusion and myocardial stunning were assessed in post-stress and rest MPI. Relationships between the presence of CAD on coronary angiography and single photon emission computerized tomography (SPECT) parameters were evaluated. The presence of perfusion abnormalities was the best diagnostic tool in detecting CAD. Although less left ventricular synchrony was observed post-stress in the CAD group compared to the non-CAD group, no significant dyssynchrony was noted.
Conclusions
The addition of phase analysis to help diagnose CAD in Tl-201-gated SPECT with dipyridamole stress may have limited value in patients with CAD with ≥ 50% stenosis.
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Abbreviations
- CAD:
-
Coronary artery disease
- CZT:
-
Cadmium-zinc-telluride
- LVEF:
-
Left ventricular ejection fraction
- LVMD:
-
Left ventricular mechanical dyssynchrony
- MPI:
-
Myocardial perfusion imaging
- PHB:
-
Phase histogram bandwidth
- PSD:
-
Phase standard deviation
- SDS:
-
Summed difference score
- SPECT:
-
Single photon emission computerized tomography
- SSS:
-
Summed stress score
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Acknowledgements
We thank Ya-Huang Chen, Chia-Wen Lai, Chao-Chun Huang, Po-Wei Li for GSPECT analyses, Chien-Yu Chu for clinical data collection, and the staff of Biotechnology R&D Center, National Taiwan University Hospital, Hsin-Chu Branch for their assistance in statistical analysis.
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This study was partially supported by Grants MOST 101-2314-B418-012-MY3, 104-2314-B-418-008 and 105-2325-B-418-001 from the Ministry of Science and Technology of Taiwan, and Far Eastern Memorial Hospital (FEMH 101-2314-B-418-012-MY3, 104-2314-B-418-008; 105-2628-B-418 -002 -MY2). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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Lin, WL., Wang, SY., Shiau, YC. et al. The clinical usefulness of phase analysis in detecting coronary artery disease using dipyridamole thallium-201-gated myocardial perfusion imaging with a cadmium-zinc-telluride camera. J. Nucl. Cardiol. 27, 241–250 (2020). https://doi.org/10.1007/s12350-018-1417-2
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DOI: https://doi.org/10.1007/s12350-018-1417-2