Prevalence and significance of an isolated long QT interval in elite athletes

Sandeep Basavarajaiah, Matthew Wilson, Gregory Whyte, Ajay Shah, Elijah Behr, Sanjay Sharma

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84 Citations (Scopus)

Abstract

Aims: Identification of a prolonged, corrected QT (QTc) interval in athletes may be a recommendation for disqualification from competitive sports. However, the prevalence and diagnostic significance of an isolated prolonged QTc in asymptomatic athletes without familial disease is unknown. Methods and results: Between 1996 and 2006, 2000 elite athletes (mean age, 20.2 years) underwent 12-lead ECG and 2-D echocardiography. The QT interval was corrected for heart rate (QTc). Athletes with QTc > 460 ms underwent 48 h Holter monitor and an exercise stress test. All athletes with a prolonged QTc interval were offered genetic testing and first-degree relatives were invited for ECG. The QTc was prolonged in seven (0.4%) athletes ranging from 460 to 570 ms. Three athletes had a QTc value of >500 ms and all exhibited one of: paradoxical prolongation of QTc during exercise, a confirmatory genetic mutation, or prolonged QTc in a first-degree relative. In contrast, none of the athletes with a QTc value of <500 ms had any other features to indicate long QT syndrome (LQTS). Conclusion: The prevalence of prolonged QTc in elite athletes is 0.4%. A QTc of >500 ms is highly suggestive of LQTS. A QTc of <500 ms in the absence of symptoms or familial disease is unlikely to represent LQTS in elite athletes.

Original languageEnglish
Pages (from-to)2944-2949
Number of pages6
JournalEuropean Heart Journal
Volume28
Issue number23
DOIs
Publication statusPublished - Dec 2007
Externally publishedYes

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    Basavarajaiah, S., Wilson, M., Whyte, G., Shah, A., Behr, E., & Sharma, S. (2007). Prevalence and significance of an isolated long QT interval in elite athletes. European Heart Journal, 28(23), 2944-2949. https://doi.org/10.1093/eurheartj/ehm404