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Myhr KA, Andrés-Jensen L, Strøier Larsen B, Kunkel JB, Kristensen CB, Vejlstrup N, Køber L, Pecini R. Sex-and age-related variations in myocardial tissue composition of the healthy heart: A native T1 mapping cohort study. Eur Heart J Cardiovasc Imaging 2024:jeae070. [PMID: 38469906 DOI: 10.1093/ehjci/jeae070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/23/2024] [Accepted: 03/02/2024] [Indexed: 03/13/2024] Open
Abstract
AIMS Cardiovascular diseases manifest differently in males and females, potentially influenced by inherent sex- and age-related differences in myocardial tissue composition. Such inherent differences are not well-established in the literature. With this study using cardiac magnetic resonance (CMR) native T1 mapping, we aim to determine the effect of sex and age on myocardial tissue composition in healthy individuals. METHODS AND RESULTS CMR native T1 mapping was performed in 276 healthy individuals (55% male, age 8---84 years) on a 1.5 Tesla scanner using a MOLLI 5(3)3 acquisition scheme. Additionally, 30 healthy participants (47% male, age 24-68 years) underwent a 1-year follow-up CMR to assess the longitudinal changes of native T1. Mean native T1 values were 1000±22 ms in males and 1022±23 ms in females (mean difference [MD]=22 ms, 95% CI [17, 27]). Female sex was associated with higher native T1 in multivariable linear regression adjusting for age, heart rate, left ventricular mass index, and blood T1 (β=10 ms, 95% CI [3.4, 15.8]). There was no significant interaction between sex and age (p=0.27). Further, age was not associated with native T1 (β=0.1 ms, 95% CI [-0.02, 0.2]), and native T1 did not change during a 1-year period (MD -4 ms, 95% CI [-11, 3]). CONCLUSION Female sex was associated with higher native T1; however, there was no association between age and native T1. Additionally, there was no evidence of an interaction between sex and age. Our findings indicate intrinsic sex-based disparities in myocardial tissue composition.
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Affiliation(s)
- Katrine Aagaard Myhr
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
| | - Liv Andrés-Jensen
- Department of Pediatric Hematology/Oncology, Juliane Marie Centre, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Copenhagen Oncology Research Laboratory (Bonkolab), Juliane Marie Centre, Copenhagen University Hospital - Rigshospitalet, Juliane Maries Vej 8, 2100 Copenhagen, Denmark
| | - Bjørn Strøier Larsen
- Department of Cardiology, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Bispebjerg Bakke 32, 2400 Copenhagen, Denmark
| | - Joakim Bo Kunkel
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
| | - Charlotte Burup Kristensen
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
- Department of Cardiology, Clinical Sciences, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Niels Vejlstrup
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
| | - Lars Køber
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
| | - Redi Pecini
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital - Rigshospitalet, Inge Lehmanns Vej 7, 2100 Copenhagen, Denmark
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