Remodeling of left ventricular hypertrophy in elite athletes after long-term deconditioning

Background— The clinical significance and long-term consequences of left ventricular (LV) hypertrophy associated with intensive athletic conditioning remain unresolved. Methods and Results— We prospectively evaluated 40 elite male athletes who had shown marked LV cavity enlargement of ≥60 mm, wall thickness of ≥13 mm, or both in a longitudinal fashion with serial echocardiograms, initially at peak training (age 24±4 years) and subsequently after a long-term deconditioning period (1 to 13 years; mean, 5.6±3.8). After detraining, LV cavity dimension decreased by 7% (61.2±2.9 to 57.2±3.1 mm; P P P Conclusions— LV remodeling was evident after long-term detraining, with significant reduction in cavity size and normalization of wall thickness. Resolution of cavity enlargement was, however, incomplete in most cases, and substantial chamber dilatation persisted in >20% of athletes. The possibility that this residual LV hypertrophy, apparently part of the athlete’s heart syndrome, may have future long-term clinical implications in some individuals cannot be excluded with certainty.