Abstract
Background
Left ventricular mechanical dyssynchrony has been shown to provide significant clinical values for chronic heart failure (HF) and cardiac resynchronization therapy (CRT). The purpose of this study was to evaluate whether electrical dyssynchrony combined with mechanical dyssynchrony has an incremental benefit over electrical dyssynchrony or mechanical dyssynchrony alone to predict clinical events in patients with acute heart failure (AHF).
Methods
Ninety-six AHF patients who received standard 12-lead ECG, gated single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI), and echocardiography were enrolled. Thirty-two normal subjects were collected as the control group to get the normal database of mechanical dyssynchrony. The end point is the composite of all-cause death and heart transplantation. Electrical dyssynchrony was defined as QRS duration > 120 ms. Mechanical dyssynchrony was defined as > mean + 2 × SD phase standard deviation (PSD) or phase bandwidth (PBW) based on our normal database.
Results
During the follow-up of 28 ± 10 months, complete data were obtained in 92 patients. 26 (28.3%) Patients who reached the end point were classified into the event group. There were no significant differences in PSD or PBW between the event and non-event groups. However, PBW > 77.76° was independently associated with the end point in the univariate and multivariate analysis (hazard ratio 2.92, 95% confidence interval 1.00-8.47, P = .049; hazard ratio 3.89, 95% confidence interval 1.01-14.97, P = .048). The Kaplan-Meier curve with a log-rank test showed that the end point rate was significantly higher in the patients with PBW > 77.76° (log-rank P = .039). Moreover, the ROC curve analysis showed that the area under the curve (AUC) for predicting end point events by the integrative analysis of QRS > 120 ms and PBW > 77.76° was significantly improved compared to QRS duration > 120 ms (AUC: 0.75 vs 0.68, P = .001) or PBW > 77.76° (AUC: 0.75 vs 0.62, P = .049), respectively. The model of combined electrical and mechanical dyssynchrony yielded a further significantly improved risk prediction for adverse events in the global χ2.
Conclusions
The combination of QRS duration > 120 ms and PBW > 77.76° was an independent predictor of all-cause death and heart transplantation in AHF patients. The integrative analysis of electrical and mechanical dyssynchrony provides incremental prognostic value for clinical use.
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Abbreviations
- AHF:
-
Acute heart failure
- HF:
-
Heart failure
- LV:
-
Left ventricle
- LVEF:
-
Left ventricular ejection fraction
- LVMD:
-
Left ventricular mechanical dyssynchrony
- NYHA:
-
New York Heart Association
- PBW:
-
Phase bandwidth
- PSD:
-
Phase standard deviation
- SPECT:
-
Single-photon emission computed tomography
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Acknowledgments
This study was funded by Grants from the Six Talents Peak Project of Jiangsu Province (Project Number 2014-WSN-008, PI: Yanli Zhou). It was also 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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None of the authors have any relevant conflicts of interest.
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Zhou, Y., He, Z., Liao, S. et al. Prognostic value of integrative analysis of electrical and mechanical dyssynchrony in patients with acute heart failure. J. Nucl. Cardiol. 28, 140–149 (2021). https://doi.org/10.1007/s12350-020-02429-1
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DOI: https://doi.org/10.1007/s12350-020-02429-1