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Exercise-induced cardiac remodelling in middle aged first-time marathon runners: a cardiac magnetic resonance study
Session:
CO 13 - Miocárdio e Pericárdio
Speaker:
João Bicho Augusto
Congress:
CPC 2018
Topic:
J. Preventive Cardiology
Theme:
29. Rehabilitation and Sports Cardiology
Subtheme:
29.3 Sports Cardiology
Session Type:
Comunicações Orais
FP Number:
---
Authors:
João Bicho Augusto; Camilla Torlasco; Andrew D'Silva; Anish Bhuva; Giulia Benedetti; Kristopher Knott; Paul Scully; Sanjay Sharma; James Moon
Abstract
<p><strong>Background: </strong>Exercise is associated with functional and structural adaptive cardiac changes in elite athletes. For recreational athletes, the (lesser) extent of cardiac remodelling is beginning to be explored. In this work, we focus on the changes associated with recreational, first-time marathon training with increasing age.</p> <p><strong>Methods: </strong>Adult marathon runners, aged 25-68 years, were evaluated in a longitudinal prospective study, six months before a marathon (baseline) and within three weeks following the race (post marathon). Cardiac magnetic resonance (CMR) imaging at 1.5T with T1 mapping (MOLLI) and extracellular volume (ECV) quantification was performed. Left (LV) and right ventricular (RV) function, volumes and LV myocardial mass were assessed by cine SSFP sequences.</p> <p><strong>Results: </strong>One hundred and twenty-three participants were recruited, among which 83 underwent both pre- and post-marathon CMR scans. Mean age was 45.1 ± 0.8 years, 46.1% male. CMR characteristics before and after marathon are summarized in <strong>Table 1</strong> and<strong> Figure 1</strong>.</p> <p><strong>Conclusions: </strong>Training and running a first marathon even in middle age is associated with cardiac remodeling. There was a significant increase in LV mass and maximum wall thickness. These changes appear to be mediated by cellular hypertrophy rather than increases in myocardial fibrosis.</p>
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