QT dispersion in young athletes Original Article

Abstract

Aim: The risk of sudden death due to ventricular hypertrophy in athletes is controversial The relation of increased QT dispersion QTd with non homogeneous ventricular repolarization and arrhythmia in patients with hypertrophic cardiomyopathy is previously demonstrated We investigated if sports related ventricular hypertrophy causes such an abnormality in ventricular repolarization Material and Method: Twenty eight swimmers and 20 healthy children between 9 and 12 5 years of age were evaluated by history physical examination 12 lead electrocardiography and echocardiography Heart rate QT interval corrected QT QTc QTd and QTc dispersion QTcd values were compared Results: Echocardiographic measurements of swimmers were within the normal limits according to their weight However the interventricular nbsp; septal nbsp; thickness IVSd nbsp; left ventricular nbsp; posterior nbsp; wall nbsp; thickness LVPWd nbsp; left ventricular end diastolic diameter LVDd left ventricular mass were significantly increased in swimmers compared to the control group p lt;0 0001 0 009 0 046 lt;0 0001 respectively There was no statistical difference in terms of heart rate QT interval QTc QTd QTcd Conclusions: Absence of increased QT dispersion in athletes indicates that the ventricular repolarization is not heterogeneous and the arrhythmia risk is not higher than the normal population in this group Turk Arch Ped 2007; 42: 117 20 Key words: QT dispersion athletes heart sudden death arrhythmia

Keywords

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Sporcu çocuklarda QT dispersiyonu Orijinal Araştırma

Öz

Amaç: Sporcularda görülen ventrikül hipertrofisinin ani ölüm riski yaratıp yaratmayacağı tartışmalıdır Hipertrofik kardiyomiyopatili hastalarda QT dispersiyonunun QTd homojen olmayan ventrikül repolarizasyonu ve aritmi riski ile ilişkisi bilinmektedir Çalışmamızda spora bağlı hipertrofinin benzer bir repolarizasyon bozukluğuna yol açıp açmadığı araştırılmıştır Gereç ve Yöntem: Dokuz ile 12 5 yaşları arasında 28 yüzücü ve 20 sağlıklı çocuk; öykü fizik muayene ekokardiyografi ve 12 derivasyonlu elektrokardiyografi EKG ile değerlendirildi Kalp hızı QT intervali düzeltilmiş QT intervali QTc QTd ve QTc dispersiyonu QTcd nbsp; karşılaştırıldı Bulgular: Sporcularda ekokardiyografik ölçümler kilolarına göre normal sınırlarda olmakla birlikte; nbsp; interventriküler septum IVSd ve sol ventrikül arka duvar kalınlıkları LVPWd sol ventrikül diyastol sonu çapı LVDd sol ventrikül kitlesi LVMI kontrol grubuna göre anlamlı olarak artmış bulundu sırasıyla p lt;0 0001 0 009 0 046 lt;0 0001 idi Kalp hızı QT intervali QTc QTd ve QTcd yönünden istatistiksel anlamlı fark bulunmadı Çıkarımlar: Sporcularda QTd’nin artmamış olması heterojen bir repolarizasyonun bulunmadığını ve normal topluma göre artmış ventriküler aritmi riski taşımadıklarını düşündürmektedir Türk Ped Arş 2007; 42: 117 20 Anahtar kelimeler: QT dispersiyonu sporcu kalbi ani ölüm aritmi

Anahtar Kelimeler

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Kaynakça

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