Alterations in cardiac mechanics following ultra-endurance exercise: Insights from left and right ventricular area-deformation loops

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Author
Lord, Rachel
George, Keith
Somauroo, John
Stembridge, Mike
Jain, Nikhil
Hoffman, Martin
Shave, Rob
Haddad, Francois
Ashley, Euan
Jones, Helen
Oxborough, David
Date
2016-06-30Acceptance date
2016-05-10
Date Deposited
2016-07-25
Type
Article
acceptedVersion
Publisher
Elsevier
ISSN
0894-7317
1097-6795 (ESSN)
Metadata
Show full item recordAbstract
Background: The aim of this study was to use novel area-deformation (ε) loops to interrogate the interaction
between the right ventricular (RV) and left ventricular (LV) mechanics following a 100-mile endurance run.
Methods: Fifteen participants (mean body mass, 70.1 ± 8.8 kg; mean age, 40 ± 8 years) were recruited for the study. Echocardiography was performed before the race, after the race, and 6 hours into recovery. RV and LV area and longitudinal ε were assessed using standard and speckle-tracking echocardiography. Following
cubic spline interpolation, these variables were obtained across the same cardiac cycle and used to derive area-ε loops.
Results: The RV area-ε loop demonstrated a rightward shift after the race, with increased RV area (from 26.0 to 27.1 cm2) and reduced peak RV ε (from 28.6% to 25.8%). The recovery RV area-ε loop was similar to the postrace loop. A leftward shift was observed in the LV area-ε loop after the race, secondary to reduced LV area
(from 35.8 to 32.5 cm2) and reduced peak ε (from 18.3% to 16.6%). In recovery, LV ε values returned toward baseline.
Conclusions: A 100-mile ultramarathon resulted in a rightward shift in the RV area-ε loop as a result of RV dilatation.
There was a concomitant leftward shift in the LV area-ε loop as a result of underfilling of the left ventricle.
At 6 hours after exercise, there was a partial recovery of the left ventricle, while RV function remained depressed. It appears that changes in RV function do not have a serial impact on the left ventricle during recovery from ultra-endurance activity.
Journal/conference proceeding
Journal of the American Society of Echocardiography
Citation
Lord, R., George, K., Somauroo, J., Jain, N., Hoffman, M.D., Shave, R., Haddad, F., Ashley, E., Jones, H. and Oxborough, D. (2016) 'Alterations in cardiac mechanics following ultra-endurance exercise: Insights from left and right ventricular area-deformation loops', Journal of the American Society of Echocardiography, 29 (9), pp.879-887
Description
This article was published in Journal of the American Society of Echocardiography on 30th June 2016 (online) available at http://dx.doi.org/10.1016/j.echo.2016.05.004
Rights
Creative Commons Attribution Non-Commercial No Derivatives License (CC BY-NC-ND)https://creativecommons.org/licenses/by-nc-nd/4.0/Sponsorship
Western States Endurance Run Foundation
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