Research article summary (published 30 May 2006):

Longitudinal and radial systolic myocardial tissue velocities after prolonged exercise.

Full Abstract

We assessed segmental and global left ventricular (LV) systolic function using tissue Doppler imaging (TDI) in 30 subjects (age: 18-62 y) before and after a marathon race. Longitudinal plane systolic (S') TDI velocities were assessed at 5 sites on the mitral annulus and radial plane S' velocities were assessed at the LV septal and free wall in a subsample (n = 9). Heart rate (HR) and LV diastolic internal dimension were also assessed before (pre) and immediately after (post) the race. Pre-post changes in all variables were analysed by repeated measures analysis of variance (ANOVA). Delta scores for TDI data were correlated with alterations in indices of LV loading, as well as with age and finishing time. Segmental longitudinal and radial TDI velocities were not significantly different pre to post race (p > 0.05), which resulted in no change in mean S' velocities (longitudinal: pre 17.0 +/- 3.4 cm x s(-1), post 17.4 +/- 4.0 cm x s(-)1; radial: pre 13.0 +/- 5.4 cm x s(-1), post 14.2 +/- 7.1 cm x s(-1); p > 0.05). Any pre-post changes in TDI data were not related to an elevated post race HR (r = 0.15, p > 0.05), a decreased post race LV internal dimension in diastole (r = 0.10, p > 0.05), age (r = -0.25, p > 0.05), or finishing time (r = -0.13, p > 0.05). Our data suggest that marathon running does not induce any segmental or global depression in LV systolic function.

Author information

Author/s: George, Keith (K); Shave, Rob (R); Oxborough, David (D); Whyte, Greg (G); Dawson, Ellen (E);

Affiliation: Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK. k.george(-atsign-)livjm.ac.uk

Journal and publication information

Publication Type: Journal Article

Journal: Applied physiology, nutrition, and metabolism = Physiologie appliquée, nutrition et métabolisme (Appl Physiol Nutr Metab), published in Canada. (Language: eng)

Reference: 2006-Jun; vol 31 (issue 3) : pp 256-60

Dates: Created 2006/06/13; Completed 2006/10/26;

PMID: 16770353, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: 18 Feb 2009 00:00:00)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adolescent Adult Blood Flow Velocity Exercise - physiology Female Heart - physiology

Humans Male Middle Aged Running - physiology Systole Time Factors

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