The objective of this study was to assess the incremental value of myocardial wall motion and thickening compared with perfusion alone obtained from gated single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) in diagnosing myocardial viability in patients with ischemic heart failure.
Eighty-three consecutive patients with ischemic heart failure who underwent both 99mTc-MIBI gated SPECT MPI and 18F-FDG positron emission tomography (PET) myocardial metabolic imaging were retrospectively enrolled. SPECT/PET myocardial viability was defined as the reference standard. Segmental myocardial perfusion, wall motion, and thickening were measured by an automated algorithm from gated SPECT MPI. Univariate and stepwise multivariate analysis were conducted to establish an optimal multivariate model for predicting hibernating myocardium and scar.
Among the 1411 segments evaluated, 774 segments had normal perfusion and 637 segments had decreased perfusion. The latter were classified by 18F-FDG PET into 338 hibernating segments and 299 scarred segments. The multivariate regression analysis showed that the model that combined myocardial perfusion uptake with wall motion and thickening scores had the optimal predictive efficiency to distinguish hibernating myocardium from scar in the segments with decreased perfusion. The model had the largest C-statistic (0.753 vs 0.666, P < 0.0001), and the global chi-square was increased from 53.281 to 111.234 when compared with perfusion alone (P < 0.001).
Assessment of myocardial wall motion and thickening in addition to conventional perfusion uptake in the segments with decreased perfusion enables better differentiation of hibernating myocardium from scar in patients with ischemic heart failure. Considering wide availability and high cost-effectiveness, regional myocardial function integrated with perfusion on gated SPECT MPI has great promise to become a clinical tool in the assessment of myocardial viability.
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Single-photon emission computed tomography
Positron emission tomography
Myocardial perfusion imaging
Coronary artery disease
Left ventricular end-diastolic volume
Left ventricular end-systolic volume
Left ventricular ejection fraction
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This research was supported by grants from National Natural Science Foundation of China (81871381, PI: Yuetao Wang; 81901777, PI: Feifei Zhang; 81701737, PI: Jianfeng Wang; 81701734, PI: Xiaoliang Shao), the 5th phase “333 talent project” training funds of Jiangsu province (PI: Xiaoliang Shao), science and technology project for youth talents of Changzhou Health Committee (QN201920, PI: Feifei Zhang), the American Heart Association (Project Number: 17AIREA33700016, PI: Weihua Zhou), and Michigan Technological University Institute of Computing and Cybersystems (PI: Weihua Zhou).
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Zhang, F., Wang, J., Shao, X. et al. Incremental value of myocardial wall motion and thickening to perfusion alone by gated SPECT myocardial perfusion imaging for viability assessment in patients with ischemic heart failure. J. Nucl. Cardiol. (2020). https://doi.org/10.1007/s12350-020-02040-4
- Myocardial perfusion imaging
- wall motion
- wall thickening
- hibernating myocardium
- ischemic heart failure