Long-Term Follow-Up of Professional Soccer Players: The Analyses of Left and Right Heart Morphology and Function by Conventional, Three-Dimensional, and Deformation Analyses

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Background: Transthoracic echocardiography (TTE) is the primary imaging modality to assess cardiac morphology and function. In athletes, distinguishing physiological adaptations from pathological changes is essential. This study aimed to evaluate long-term cardiac structural and functional changes in professional soccer players. Methods: This retrospective study included 20 healthy male professional soccer players (mean age 21.2 ± 3.4 years) from the German first division, examined annually from 2016 to 2024 (mean follow-up 5.6 ± 2.0 years). TTE parameters associated with the “athlete’s heart” were assessed, including left ventricular end-diastolic diameter (LVEDD), interventricular septal thickness (IVSD), relative wall thickness (RWT), indexed LV mass (LVMi), and left atrial volume index (LAVi), along with 3D-derived LV and RV volumes. Advanced deformation imaging included global longitudinal strain (GLS), right ventricular strain (RVS), and left/right atrial reservoir strain (LASr and RASr, respectively). Baseline and final follow-up values were compared. Results: No significant changes were observed over time in conventional or advanced echocardiographic parameters (e.g., LVEDD: 54.5 ± 3.1 mm vs. 54.6 ± 3.9 mm; p = 0.868; GLS: −18.7% ± 2.2% vs. −18.4% ± 1.9%; p = 0.670). Ventricular volumes and strain values also remained stable throughout follow-up. Conclusions: Over a mean follow-up of more than five years, professional soccer players showed stable cardiac morphology and function without evidence of pathological remodeling. These findings support the concept that long-term high-level training in mixed-discipline sports leads to balanced, physiological cardiac adaptation.

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