Original paper<br>A 24-HOUR AMBULATORY ECG MONITORING IN ASSESSMENT OF QT INTERVAL DURATION AND DISPERSION IN ROWERS WITH PHYSIOLOGICAL MYOCARDIAL HYPERTROPHY

I.Y. Lutfullin; Z.F. Kim; R.R. Bilalova; N.A. Tsibulkin; R.R. Almetova; R.R. Mudarisova; I.I. Ahmetov

eISSN: 2083-1862
ISSN: 0860-021X

Biology of Sport

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4/2013
vol. 30

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abstract:

Original paper
A 24-HOUR AMBULATORY ECG MONITORING IN ASSESSMENT OF QT INTERVAL DURATION AND DISPERSION IN ROWERS WITH PHYSIOLOGICAL MYOCARDIAL HYPERTROPHY

I.Y. Lutfullin

,

Z.F. Kim

,

R.R. Bilalova

,

N.A. Tsibulkin

,

R.R. Almetova

,

R.R. Mudarisova

,

I.I. Ahmetov

Biol. Sport 2013;30:237-241

Online publish date: 2014/08/20

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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 QTс 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.

keywords:

Original paperA 24-HOUR AMBULATORY ECG MONITORING IN ASSESSMENT OF QT INTERVAL DURATION AND DISPERSION IN ROWERS WITH PHYSIOLOGICAL MYOCARDIAL HYPERTROPHY

I.Y. Lutfullin , Z.F. Kim , R.R. Bilalova , N.A. Tsibulkin , R.R. Almetova , R.R. Mudarisova , I.I. Ahmetov

athletes, myocardial hypertrophy, left ventricular mass, QT interval, Holter monitoring

Original paper
A 24-HOUR AMBULATORY ECG MONITORING IN ASSESSMENT OF QT INTERVAL DURATION AND DISPERSION IN ROWERS WITH PHYSIOLOGICAL MYOCARDIAL HYPERTROPHY

I.Y. Lutfullin

,

Z.F. Kim

,

R.R. Bilalova

,

N.A. Tsibulkin

,

R.R. Almetova

,

R.R. Mudarisova

,

I.I. Ahmetov