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Bernhard B, Leib Z, Dobner S, Demirel C, Caobelli F, Rominger A, Schütze J, Grogg H, Alwan L, Spano G, Boscolo Berto M, Lanz J, Pilgrim T, Windecker S, Stortecky S, Gräni C. Routine 4D Cardiac CT to Identify Concomitant Transthyretin Amyloid Cardiomyopathy in Older Adults with Severe Aortic Stenosis. Radiology 2023; 309:e230425. [PMID: 38085082 DOI: 10.1148/radiol.230425] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Background Transthyretin amyloid cardiomyopathy (ATTR-CM) often coexists with severe aortic stenosis (AS). Although strain analysis from cardiac MRI and echocardiography was demonstrated to predict coexisting ATTR-CM, comparable data from four-dimensional (4D) cardiac CT are lacking despite wide availability. Purpose To evaluate the diagnostic performance of 4D cardiac CT-derived parameters in identifying ATTR-CM in older adults considered for transcatheter aortic valve implantation (TAVI). Materials and Methods This prospective single-center screening study for ATTR-CM included consecutive patients with severe AS considered for TAVI who underwent 4D cardiac CT between August 2019 and August 2021 approximately 1 day before technetium 99m (99mTc) 3,3-diphosphono-1,2-propanodicarboxylic-acid (DPD) scintigraphy. The diagnostic performance of CT-based left ventricular (LV), right ventricular, and left atrial dimensions, ejection fraction (EF), and myocardial strain were evaluated against 99mTc-DPD scintigraphy as the reference standard to identify ATTR-CM. Predictors and an unweighted cardiac CT score were validated with internal bootstrapping. The assignment of variables to the score was based on cutoff values achieving the highest Youden index J. Results Among 263 participants (mean age, 83 years ± 4.6 [SD]; 149 male and 114 female participants), 99mTc-DPD scintigraphy (Perugini grade 2 or 3) confirmed coexisting ATTR-CM in 27 (10.3%). CT-derived LV mass index, LV and LA global longitudinal strain (GLS), and relative apical longitudinal strain each predicted the presence of ATTR-CM with an area under the curve (AUC) of at least 0.70. Implementing these parameters with cutoff values of 81 g/m2 or higher, -14.9% or higher, less than 11.5%, and 1.7 or higher in the CT score, respectively, yielded high diagnostic performance (AUC = 0.89; 95% CI: 0.81, 0.94; P < .001) robust to internal bootstrapping validation (AUC = 0.88; 95% CI: 0.82, 0.94). If two criteria were fulfilled, the sensitivity and specificity in the detection of ATTR-CM were 96.3% (95% CI: 81.0, 99.9) and 58.9% (95% CI: 52.3, 65.2), respectively. Conclusion When compared against 99mTc-DPD scintigraphy as the reference standard, routine 4D cardiac CT in older adults considered for TAVI provided high diagnostic performance in the detection of concomitant ATTR-CM by assessing LV and left atrial GLS, relative apical longitudinal strain, and LV mass index. ClinicalTrials.gov registration no.: NCT04061213 © RSNA, 2023 Supplemental material is available for this article. See also the editorial by Tavakoli and Onder in this issue.
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Affiliation(s)
- Benedikt Bernhard
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Zoe Leib
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Stephan Dobner
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Caglayan Demirel
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Federico Caobelli
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Axel Rominger
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Jonathan Schütze
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Hanna Grogg
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Louhai Alwan
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Giancarlo Spano
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Martina Boscolo Berto
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Jonas Lanz
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Thomas Pilgrim
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Stephan Windecker
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Stefan Stortecky
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Christoph Gräni
- From the Departments of Cardiology (B.B., Z.L., S.D., C.D., J.S., H.G., L.A., G.S., M.B.B., J.L., T.P., S.W., S.S., C.G.) and Nuclear Medicine (F.C., A.R.), Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
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