Abstract
Aims
The purpose of the study was to describe the pattern of 99mTc-labeled phosphate agents myocardial uptake by scintigraphy and explore its impact on left ventricular (LV) functions in transthyretin cardiac amyloidosis (TTR-CA).
Methods
Fifty patients with TTR-CA underwent 99mTc- hydroxymethylene-diphosphonate (99mTc-HMDP) scintigraphy and echocardiography with measure of LV thickness, longitudinal strain (LS), systolic and diastolic functions. Cardiac retention by scintigraphy was assessed by visual scoring and the heart/whole body (H/WB) ratio was calculated by dividing counts in the heart by counts in late whole-body images.
Results
The mean population age was 79 ± 10 years. Mean H/WB ratio was 12 ± 7. Myocardial 99mTc-HMDP uptake on segments 5, 6, 7, 8, 11, 12, 13, 14, 16, and 17 was correlated with H/WB ratio. Mean LVEF and global LS were 51 ± 10% and − 10 ± 3%, respectively. H/WB ratio was correlated with global LS (R = 0.408, P = .003), Ea (R = − 0.566, P < .001) and mean left ventricular wall thickness (R = 0.476, P < .001) but not with LVEF (R = − 0.109, P = .453). Segmental myocardial uptake was slightly correlated with segmental LS (R = 0.152, P < .001). H/WB ratio was not correlated with NT-proBNP levels (R = 0.219, P = .148) neither E/Ea ratio (R = 0.204, P = .184).
Conclusion
These findings show the relationship between bone tracer myocardial uptake and LV functions in patients with TTR cardiac amyloidosis.
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Abbreviations
- 99mTc-HMDP:
-
99mTc-hydroxymethylene-diphosphonate
- H/WB:
-
Heart/whole body
- IQR:
-
Inter-quartile range
- LV:
-
Left ventricle
- LVEF:
-
Left ventricular ejection fraction
- LS:
-
Longitudinal strain
- NT-proBNP:
-
N-terminal pro-hormone brain natriuretic peptide
- TTR:
-
Transthyretin
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Toulouse Amyloidosis Research Network collaborators
Stanislas Faguer, MD, PhD, Dominique Chauveau, MD, PhD, Antoine Huart, MD, Joelle Guitard, MD, Pauline Bernadet Monrozies, MD (Department of Nephrology and Referral Center for Rare Diseases, University Hospital of Rangueil, Toulouse, France); Pascal Cintas, MD, PhD (Department of Neurology, Purpan University Hospital, Toulouse, France); Laurent Alric, MD, PhD (Department of Internal Medicine and Digestive Diseases, Purpan University Hospital, Toulouse, France); Daniel Adoue, MD, PhD, Laurent Sailler, MD, PhD, Léonardo Astudillo, MD (Department of Internal Medicine, Toulouse University Hospital, Toulouse, France); Bénédicte Puissant, MD (Immunology Laboratory, Toulouse University Hospital, Toulouse, France); Grégoire Prévot, MD (Department of Pneumology, Toulouse University Hospital, Toulouse, France); Magali Colombat, MD, PhD, Audrey Delas, MD (Department of Pathology, IUCT Oncopôle, Toulouse, France); Murielle Roussel, MD (Department of Hematology, Toulouse University Hospital, Toulouse, France); Eve Cariou, MD (Department of Cardiology, Rangueil University Hospital, Toulouse, France); Delphine Dupin-Deguine, MD.
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Pradel, S., Brun, S., Victor, G. et al. Pattern of myocardial 99mTc-HMDP uptake and impact on myocardial function in patients with transthyretin cardiac amyloidosis. J. Nucl. Cardiol. 27, 96–105 (2020). https://doi.org/10.1007/s12350-018-1316-6
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DOI: https://doi.org/10.1007/s12350-018-1316-6