Skip to content

Effect of preload augmentation on pulsed wave and tissue Doppler echocardiographic indices of diastolic function after a marathon

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)1393-9
Number of pages7
JournalJournal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
Volume20
Issue number12
DOIs
DatePublished - Dec 2007

Abstract

BACKGROUND: The mechanisms underlying alterations in left ventricular diastolic function after a marathon are unknown and may be a consequence of a reduced preload.

OBJECTIVE: We sought to assess the effect of preload augmentation through passive leg elevation (PLE) on echocardiographic indices of diastolic function after a marathon.

METHODS: Fourteen trained participants (13 male) were echocardiographically assessed before and after a marathon in the supine position and during PLE. Diastolic function was measured via conventional Doppler, color M-mode, and tissue Doppler echocardiography. Early and late transmitral filling velocities (E and A, respectively), flow propagation velocity of early filling, and basal early and late left ventricular wall velocities (E' and A', respectively) were obtained.

RESULTS: The E/A ratio, flow propagation velocity of early filling, and the E'/A' ratio decreased by 31%, 24%, and 32%, respectively (P < .05), after marathon running. Postrace PLE returned E to baseline and increased E/A compared with postrace supine (P < .05). However, E/A remained depressed compared with baseline as a result of the persistent elevation in A. Postrace PLE caused Vp to return to baseline; mean E' also increased (9%, P < .05), but did not return to resting levels. Mean A' was unaffected by postrace PLE, therefore, E'/A' was unchanged postrace despite PLE.

CONCLUSION: 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.

    Research areas

  • Adult, Echocardiography, Doppler, Female, Heart Ventricles, Humans, Image Enhancement, Image Interpretation, Computer-Assisted, Male, Models, Biological, Models, Statistical, Physical Endurance, Reproducibility of Results, Running, Sensitivity and Specificity, Stroke Volume, Ventricular Function

Documents

View research connections

Related faculties, schools or groups