Abstract
The aim is to evaluate the diagnostic yield of echocardiography and [99mTc]Tc-DPD scintigraphy in the detection of amyloid cardiomyopathy (CM) and define potential prognostic echocardiographic parameters. 133 patients were retrospectively studied, from 2016 to 2021, with a mean age of 80.2 ± 7.5 years. The final diagnosis was established according to international consensus. Patients had a transthoracic echocardiogram (TTE) and [99mTc]Tc-DPD scintigraphy; RWT, E/e, LS, TAPSE, SAB, and IWT scores were calculated. All patients with ATTR-CM were classified into 3 prognostic stages and were compared with Perugini grades and echocardiographic parameters. CM was confirmed in 85 cases (63.9%), 76 (57.1%) ATTR-CM, and 9 (6.8%) AL-CM. The diagnostic yield of [99mTc]Tc-DPD scintigraphy and echocardiography were calculated, with a sensitivity of 90.7%, specificity of 100%, PPV of 100%, and NPV of 87.2% in myocardial scintigraphy, versus 74.6%, 62.5%, 75.6%, 61.2% in the echocardiogram. According to the IWT score, most patients were classified in the intermediate group; 33 presented with grade 2–3 uptakes. Significant results were obtained when comparing Perugini score with IWT (p: 0.02) and SAB (p: 0.03); and between biomarkers stages and LVEF (p: 0.028), E/e´ (p: 0.001), and GLS% (p: 0.022). [99mTc]Tc-DPD scintigraphy is superior in diagnosing CA. SAB could be the most reliable parameter in an early diagnostic phase, showing a strong correlation with Perugini grades 2 and 3.
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MdelCMA, EAJC, and CAJC: have written the manuscript, collected the data, and performed the statistical analysis. VPN and AMM: contributed to the diagnosis and follow-up of the patients. ÁRM: supervised the data collection and the study design.
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del Carmen Mallón Araujo, M., Casas, E.A.J., Casas, C.A.J. et al. Cardiac scintigraphy and echocardiography assessment in the diagnosis of transthyretin cardiac amyloidosis. Int J Cardiovasc Imaging 40, 415–424 (2024). https://doi.org/10.1007/s10554-023-02987-8
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DOI: https://doi.org/10.1007/s10554-023-02987-8