Diastolic filling in hypertrophied hearts of elite runners: an echo-Doppler study

Abstract

The aim of this study was to establish if the physiologic adaptations following a prolonged physical training could influence the diastolic function in a professional Olympic male runner group. From February to December 1999 we studied 25 athletes (Group I) during the period of maximal training compared with 18 healthy sedentary subjects of matched age and sex (Group II). We used mono and bidimensional Echocardiography to assess left ventricular structure and systolic function. The diastolic function was evaluated by Doppler method assessing transmitral and venous pulmonary flow. From the comparison between the two groups, we found great differences in the interventricular septum and the posterior wall thickness; the analysis of the systolic function demonstrated a significant increase in ejection fraction, stroke volume, left ventricular mass, and end-diastolic volume in the athletes' population. Fluximetric study of transmitral and pulmonary venous flow showed that ventricular diastolic function is not influenced by hypertrophy. Our data indicate that diastolic function remains normal or improves in some cases after physical training; left ventricular hypertrophy and concentric remodeling do not involve diastolic changes like hypertrophic and hypertensive heart diseases.