Abstract 10737: Left Atrial Volume Index and Left Ventricular Diastolic Function in Elite High School Athletes: Impact of Long-Term High Intensity Athletic Training and Type of Sport
Background: Left atrial volume index (LAVI) has been shown to strongly correlate with diastolic dysfunction and be a powerful predictor of cardiac morbidity & mortality in adults. LAVI also correlates closely with increased LV preload in children with congenital heart disease. Cardiac adaptation to high intensity athletic training is characterized by increases in LV dimension, wall thickness & mass. The purpose of this study was to assess the impact of long-term athletic training in various high intensity sports on LAVI and parameters of LV diastolic function in elite high school athletes as compared to sedentary controls.
Methods: Standard 2D, Doppler, & tissue Doppler were prospectively performed utilizing a GE Vivid 7 system to evaluate LAVI & LV diastolic function in 146 elite high school athletes compared to age & gender matched sedentary controls. The impact of the type of sport & associated unique training (figure skating, ice hockey, soccer) on LAVI & LV diastolic function was also assessed.
Results: (See Table). Heart rate, LV dimensions, and LV mass were significantly different in athletes compared to controls. Traditional measures of LV diastolic function were not different between groups. However, LAVI was significantly increased in athletes compared to controls (34.1 +/- 6.2 vs. 22.3 +/- 5.4, p<0.001). Similar changes were demonstrated in all athletes, with the most marked differences found in hockey (LAVI = 35.0 +/- 5.6 cc/m2) and soccer (LAVI = 34.0 +/- 6.6 cc/m2) players, compared to figure skaters (LAVI = 30.7 +/- 5.9 cc/m2).
Conclusions: In young athletes, left atrial volume index increases linearly with intensity of athletic training & the magnitude of this increase varies with the type of sport. High endurance sports requiring rapid accelerations, such as soccer and ice hockey, result in the largest increases in LAVI, while other parameters of LV diastolic function remain unchanged.
- © 2011 by American Heart Association, Inc.