Effect of Preload Augmentation on Pulsed Wave and Tissue Doppler Echocardiographic Indices of Diastolic Function After a Marathon

Postexercise alterations in Doppler indices of diastolic function can be partially explained by a reduction in preload. However, data from tissue Doppler echocardiography indicate that there is an intrinsic impairment in myocardial relaxation after marathon running.