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A 24-hour ambulatory ECG monitoring in assessment of QT interval duration and dispersion in rowers with physiological myocardial hypertrophy

Lutfullin, IY, Kim, ZF, Bilalova, RR, Tsibulkin, NA, Almetova, RR, Mudarisova, RR and Ahmetov, II (2013) A 24-hour ambulatory ECG monitoring in assessment of QT interval duration and dispersion in rowers with physiological myocardial hypertrophy. Biology of Sport, 30 (4). pp. 237-241. ISSN 0860-021X

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Myocardial hypertrophy (MH) due to cardiac pathology is characterized by an increase in QT interval duration and dispersion, while the findings for exercise-induced myocardial hypertrophy are contradictory. The majority of published research findings have not explored this relationship, but there have only been a few conducted studies using 24-hour ECG monitoring. The aim of the study was to determine the QT interval duration and dispersion in short-term and 24-hour ECG in endurance athletes with myocardial hypertrophy and without it. Methods: A total of 26 well-trained rowers underwent a resting 12-lead ECG, 24-hour ECG monitoring and echocardiography. Results: Athletes with MH (n = 7) at rest did not show any increase in QTc interval duration and dispersion, or mean and maximal QTc duration in Holter monitoring compared to athletes without MH (n = 19). Left ventricular mass was not significantly correlated with any QTc characteristics. Furthermore, athletes with MH had significantly longer mean QT (P = 0.01) and maximal QT (P = 0.018) intervals in Holter monitoring and higher 24-hour heart rate variability indexes due to stronger vagal effects. Conclusions: The present study demonstrated that athlete's heart syndrome with myocardial hypertrophy as a benign phenomenon does not lead to an increase in QT interval duration, or increases in maximal and mean duration in a 24-hour ECG. An increase in QT interval duration in athletes may have an autonomic nature.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Life Sciences & Biomedicine; Sport Sciences; athletes; myocardial hypertrophy; left ventricular mass; QT interval; Holter monitoring; LEFT-VENTRICULAR HYPERTROPHY; AMERICAN-SOCIETY; HEART; ENDURANCE; LONG; ECHOCARDIOGRAPHY; RECOMMENDATIONS; HYPERTENSION; GUIDELINES; COMMITTEE; Holter monitoring; QT interval; athletes; left ventricular mass; myocardial hypertrophy; 1106 Human Movement and Sports Sciences; Sport Sciences
Subjects: Q Science > QH Natural history > QH426 Genetics
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: Termedia Publishing
SWORD Depositor: A Symplectic
Date Deposited: 30 Apr 2024 10:43
Last Modified: 30 Apr 2024 10:43
DOI or ID number: 10.5604/20831862.1077547
URI: https://researchonline.ljmu.ac.uk/id/eprint/23077
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