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Myocardial deformation and morphological adaptation to exercise in athletes: insights from feature tracking cardiovascular magnetic resonance
Session:
Posters (Sessão 5 - Écran 3) - Imagem multimodal 2
Speaker:
Rita Reis Santos
Congress:
CPC 2023
Topic:
B. Imaging
Theme:
03. Imaging
Subtheme:
03.6 Cross-Modality and Multi-Modality Imaging Topics
Session Type:
Pósters Electrónicos
FP Number:
---
Authors:
Rita Reis Santos; Cláudia Silva; Andrés Marcos-Carrión; M. Pilar García-Lopez; M. Pilar Lopez-Lereu; Jose V. Monmeneu; Laura Higueras; Alicia M. Maceira
Abstract
<p style="text-align:start"><span style="font-size:16px"><span style="font-family:Times New Roman,Times,serif"><span style="color:#000000"><strong>Background: </strong>Long-term physical exercise induces several cardiac morphological and functional changes, commonly recognized as athlete´s heart. Cardiac magnetic resonance (CMR) plays an important role as a non-invasive method for determining LV mass and volume and CMR feature tracking (CMR-FT) allows for the analysis of myocardial deformation. </span></span></span></p> <p style="text-align:start"><span style="font-size:16px"><span style="font-family:Times New Roman,Times,serif"><span style="color:#000000"><strong>AIM:</strong> To describe left and right ventricular cardiac morphological structure, and to assess the correlation between myocardial deformation and morphological changes in athletes (by CMR-FT). </span></span></span></p> <p style="text-align:start"><span style="font-size:16px"><span style="font-family:Times New Roman,Times,serif"><span style="color:#000000"><strong>Methods</strong>: Athletes who performed CMR at 1.5T and 3T at a single center were retrospectively included. Left (LV) and right ventricular (RV) volumes (end-diastolic and end-systolic) by CMR, as well as ejection fraction (EF) and LV mass (LVMi) were collected. CMR-FT LV and RV longitudinal, circumferential, and radial strain (GLS, GCS, GRS) were analyzed. Exercise intensity was classified according to current guidelines in low, medium, and high intensity training.</span></span></span></p> <p style="text-align:start"><span style="font-size:16px"><span style="font-family:Times New Roman,Times,serif"><span style="color:#000000"><strong>Results: </strong>Seventy-five athletes were included (31±12 years, 69% male, 5.3% individuals practicing low intensity exercise, 44.0% medium intensity, and 38.7% with high intensity training). Regarding morphological characteristics, mean LVMi was 81.6 ± 21.8 g/m<sup>2</sup>, and mean LV indexed end-diastolic (EDVi) and end-systolic (ESVi) volumes were 101.8 ± 19.0 ml/m<sup>2</sup> and 37.2 ± 9.9 ml/m<sup>2</sup>, respectively. Mean RV EDVi and ESVi were 102 ± 19.1 and 39.7 ± 10.4 ml/m<sup>2</sup>, respectively. LV GLS attenuation was directly correlated with LV ESVi (r=0.366, p<0.01), GCS was directly correlated with LV EDVi (r=0.389, p=0.001), LV ESVi (r=0.646, p<0.001) and LVMi (r=0.292, p=0.017). LV GRS correlated inversely with LV volumes and mass – Figure1A. Reduced RV circumferential deformation was significantly correlated with higher RV ESVi (r=0.331, p=0.007) as with lower RV EF (r=0.404; p=0.001). RV GRS presented a direct correlation with RV EF (r=0.418; p<0.001) - Figure 1B. No significant correlations were found between RV GLS and volumes or EF. </span></span></span></p> <p style="text-align:start"><span style="font-size:16px"><span style="font-family:Times New Roman,Times,serif"><span style="color:#000000"><strong>Conclusion</strong>: In our cohort, attenuation of LV strain was correlated with hypertrophy, ventricular enlargement and EF%. RV deformation parameters were only correlated with ESVi and EF%, which could be related with the distinct anatomy and physiology of RV. Further studies are needed to investigate adaptive changes in myocardial deformation induced by athletic training.</span></span></span></p>
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