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Exploratory insights from the right-sided electrocardiogram following prolonged endurance exercise.

Lord, R and George, KP and Somauroo, J and Jain, N and Reese, K and Hoffman, MD and Haddad, F and Ashley, E and Jones, H and Oxborough, D (2016) Exploratory insights from the right-sided electrocardiogram following prolonged endurance exercise. European Journal of Sport Science. ISSN 1536-7290

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Abstract

BACKGROUND: Prolonged strenuous exercise has a profound effect on cardiac function. The right heart may be more susceptible to this imposition; yet, right-sided chest leads have not been utilised in this setting. METHODS: Thirty highly trained athletes at the 2014 Western States 100-mile Endurance Run from Squaw Valley to Auburn, California (body mass 68 ± 12 kg, age 45 ± 10 years, 57 ± 15 miles per week) were recruited for the study. Pre- and post-race, a right-sided 12-lead ECG was obtained and data were extracted for P, R and S waves, J point, ST segment and T wave amplitude. Data were compared using Students T-test and statistical significance set as P < .05. RESULTS: There was a significant increase in P wave amplitude (29%) and QTc interval (4%) pre- to post-race from standard 12-lead ECG. From the right-sided12-lead ECG, a 23% (P = .01) and 38% (P = .03) increase in J point amplitude in V1R and V2R and a 22% (P = .05) increase in ST segment integral in V2R and V3R were evident. T wave inversion was evident in leads V2R-V6R in 50-90% of athletes, respectively. Close examination revealed marked heterogeneity in individual ECGs. CONCLUSIONS: Completion of a 100-mile ultra-marathon resulted in significant changes in the right-sided ECG alongside more marked responses in specific individuals. P wave, ST segment and T wave changes post-race are indicative of acute exercise-induced right heart electrical adaptation.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis Group in European Journal of Sport Science on 30/03/16, available online: http://www.tandfonline.com/10.1080/17461391.2016.1165292
Uncontrolled Keywords: 1106 Human Movement And Sports Science, 0913 Mechanical Engineering
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: Taylor & Francis
Related URLs:
Date Deposited: 04 Apr 2016 08:15
Last Modified: 04 Apr 2016 08:15
DOI or Identification number: 10.1080/17461391.2016.1165292
URI: http://researchonline.ljmu.ac.uk/id/eprint/3362

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