Abstract
Background
Sudden cardiac death (SCD) can be the first clinical event of Chagas heart disease (CHD). However, current guidelines contain no clear recommendation for early cardioverter-defibrillator implantation. Using imaging modalities, we evaluated associations among autonomic denervation, myocardial hypoperfusion, fibrosis and ventricular arrhythmia in CHD.
Methods and results
Twenty-nine patients with CHD and preserved left ventricular function underwent 123I-metaiodobenzylguanidine (MIBG) scintigraphy, 99mTc-methoxyisobutylisonitrile (MIBI) myocardial perfusion and cardiac magnetic resonance imaging (MRI). They were divided into arrhythmic (≥ 6 ventricular premature complexes/h and/or non-sustained ventricular tachycardia on 24-hour Holter, n = 15) and non-arrhythmic (< 6 ventricular premature complexes/h and no ventricular tachycardia; n = 14) groups. The arrhythmic group had higher denervation scores from MIBG imaging (23.2 ± 18.7 vs 5.6 ± 4.9; P < .01), hypoperfusion scores from MIBI SPECT (4.7 ± 6.8 vs 0.29 ± 0.6: P = .02), innervation/perfusion mismatch scores (18.5 ± 17.5 vs 5.4 ± 4.8; P = .01) and fibrosis by late gadolinium enhancement on MRI (14.3% ± 13.5% vs 4.0% ± 2.9%; P = .04) than the non-arrhythmic group.
Conclusion
These imaging parameters were associated with ventricular arrhythmia in early CHD and may enable risk stratification and the implementation of primary preventive strategies for SCD.
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Abbreviations
- CHD:
-
Chagas heart disease
- ECV:
-
Extracellular volume
- GLS:
-
Global longitudinal strain
- ICD:
-
Implantable cardioverter-defibrillator
- LGE:
-
Late gadolinium enhancement
- MIBI:
-
Sestamibi
- 123I-MIBG:
-
Iodine-123-metaiodobenzylguanidine
- MRI:
-
Magnetic resonance imaging
- SCD:
-
Sudden cardiac death
- SPECT:
-
Single photon emission computed tomography
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Acknowledgements
We thank all of the staff and research assistants at D’Or Institute for Research and Education, Oswaldo Cruz Foundation—Fiocruz, and the patients who took part in this study. We are grateful to Rubem Menna-Barreto for kindly offering the image of Trypanosoma cruzi.
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This work was supported by the D’Or Institute for Research and Education (IDOR), Rio de Janeiro; Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation (Fiocruz), INOVA (no. VPPCB-007-FIO-18-2-10-30), Rio de Janeiro, Brazil; and the Brazilian National Council for Scientific and Technological Development (CNPq; no. 437025/2018-7).
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de Brito, A.S.X., Moll-Bernardes, R.J., Pinheiro, M.V.T. et al. Autonomic denervation, myocardial hypoperfusion and fibrosis may predict ventricular arrhythmia in the early stages of Chagas cardiomyopathy. J. Nucl. Cardiol. 30, 2379–2388 (2023). https://doi.org/10.1007/s12350-023-03281-9
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DOI: https://doi.org/10.1007/s12350-023-03281-9