Abstract
Background
The purpose of this study was to evaluate the predictive value of left ventricular (LV) shape parameters measured by gated SPECT myocardial perfusion imaging (MPI) in super-responders enrolled in the VISION-CRT trial.
Methods
One hundred and ninety-nine patients who met standard criteria for CRT from multiple centers were enrolled in this study. End-systolic eccentricity (ESE) and end-diastolic eccentricity (EDE) were measures of LV shape. Super-responders were the patients who had a relative increase in left ventricular ejection fraction (LVEF) ≥ 15%.
Results
Complete data were obtained in 165 patients, and 43.6% of them were classified as super-responders. ESE was an independent predictor of CRT super-responders in univariate (OR 12.59, 95% CI 1.56–101.35, P = .017) and multivariate analysis (OR 35.71, 95% CI 1.66–766.03, P = .006). ESE had an incremental value over significant clinical and SPECT imaging variables, including angiotensin-converting enzyme inhibitors or angiotensin II receptor blocker, coronary artery disease, myocardial infarction, LVEF, end-diastolic volume index, and scar burden (AUC 0.82 vs. 0.80, sensitivity 0.68 vs. 0.65, specificity 0.82 vs. 0.78).
Conclusions
LV shape parameters derived from gated SPECT MPI have the promise to improve the prediction of the super-response to CRT. Moreover, ESE provides incremental value over existing clinical and nuclear imaging variables.
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Abbreviations
- CRT:
-
Cardiac resynchronization therapy
- ECTb4:
-
Emory Cardiac Toolbox Version 4.0
- EDE:
-
End-diastolic eccentricity
- ESE:
-
End-systolic eccentricity
- LV:
-
Left ventricular
- LVEDV:
-
Left ventricular end-diastolic volume
- LVEF:
-
Left ventricular ejection fraction
- LVESV:
-
Left ventricular end-systolic volume
- PSD:
-
Phase histogram standard deviation
- MPI:
-
Myocardial perfusion imaging
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ZH: Conception and design; analysis and interpretation of data; drafting of the manuscript and revising it critically for important intellectual content. FAF: Analysis and interpretation of data; revising the manuscript critically for important intellectual content. EAN: Revising it critically for important intellectual content. EVG: Conception and design. CTM: Conception and design; and final approval of the manuscript submitted. WZ: Conception and design; analysis and interpretation of data; revising the manuscript critically for important intellectual content; and final approval of the manuscript submitted.
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Dr. Ernest Garcia receives royalties from the sale of the Emory Cardiac Toolbox and has equity positions with Syntermed, Inc. The terms of these arrangements have been reviewed and approved by Emory University in accordance with its conflict of interest policies. Zhuo He, Fernando Fernandes, Erivelton Nascimento, Claudio T. Mesquita, and Weihua Zhou declare that they have no conflicts of interest.
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The study was approved by the participating countries’ scientific councils and complied with the Declaration of Helsinki.
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Written informed consent was obtained from all participants, and patient anonymity was maintained during data analysis.
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Funding This study presents the results derived from the International Atomic Energy Agency (IAEA) multicenter trial: “Value of intraventricular synchronism assessment by gated SPECT myocardial perfusion imaging in the management of heart failure patients submitted to cardiac resynchronization therapy” (IAEA VISION-CRT), Coordinated Research Protocol E1.30.34, and received funds from IAEA. This research was supported by a grant from the American Heart Association (Project Number: 17AIREA33700016, PI: Weihua Zhou) and a new faculty grant from Michigan Technological University Institute of Computing and Cybersystems (PI: Weihua Zhou).
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He, Z., de Amorim Fernandes, F., do Nascimento, E.A. et al. Incremental value of left ventricular shape parameters measured by gated SPECT MPI in predicting the super-response to CRT. J. Nucl. Cardiol. 29, 1537–1546 (2022). https://doi.org/10.1007/s12350-020-02469-7
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DOI: https://doi.org/10.1007/s12350-020-02469-7