Effects of sports activity in athletes with bicuspid aortic valve and mild aortic regurgitation.

OBJECTIVE: In this study, the impact of regular training on left ventricle morphology in a group of athletes with bicuspid aortic valve (BAV) was evaluated. DESIGN: Longitudinal cohort study. A group of competitive athletes with BAV was followed up with a yearly standard echocardiographic examination for 5 years. SETTING: Sport Medicine Centre, University of Florence, Pre-Participation Protocol Study. PARTICIPANTS: A group of 88 consecutive athletes diagnosed with BAV was identified in the period January to December 1999, and 30 of these completed a 5-year follow-up. They were compared with a group of 56 athletes with a normal tricuspid valve (TAV). RESULTS: BAV athletes showed significant progressive increase in left ventricular dimensions and aortic diameters at four levels. The values were within the range of the general and non-athletic BAV populations. In TAV athletes, the aortic and left ventricle dimensions did not increase significantly and remained within physiological range. CONCLUSIONS: Left ventricular dimensions in competitive BAV athletes remain within the normal range. There is, however, a significant progressive increase in the BAV group compared with the TAV group. These results are in agreement with data obtained in previous studies on the non-athletic BAV population. Sports activity does not have an additional effect on cardiac morphology in athletes with asymptomatic BAV associated with mild regurgitation, for at least 5 years.