title: [Comparison of four formulas of adjusting QT interval for the heart rate in young elite athletes].
abstract: OBJECTIVE
  Sudden cardiac death in young athlete is always tragic. Some international guidelines recommend the realization of an electrocardiogram before practicing competitive sports to carry out the risk of sudden cardiac death due to genetic cardiopathy like QT long syndrome. Unfortunately, the diagnosis can be difficult because intensive sport can increase the QT interval over normal recognized values for sedentary people. Using a QT correction formula free of heart rate appears essential.
  
  
  METHODS
  Four hundred and forty-six young athletes (aged 10 to 18) had an electrocardiogram. QT intervals were measured and four methods were used to correct the QT interval for heart rate.
  
  
  RESULTS
  The Bazett formula performed the worst in terms of rate adjustment success. Hodges and Fridericia formulas are the best both in males and females, independently of age. Female had longer QTc intervals than males.
  
  
  CONCLUSIONS
  The most widely used Bazett formula should be surrendered whereas Hodges and Fridericia formulas should be preferred, particularly in young athletes.
authors.affiliation: Service de cardiologie, hôpital d'instruction des armées Desgenettes, 108, boulevard Pinel, 69275 Lyon cedex 03, France. Electronic address: griffet69@free.fr.
authors.forename: V
authors.initials: V
authors.lastname: Griffet
authors.affiliation: Pavillon A, hôpital Édouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France.
authors.forename: E
authors.initials: E
authors.lastname: Dalmais
authors.affiliation: Pavillon A, hôpital Édouard-Herriot, 5, place d'Arsonval, 69003 Lyon, France.
authors.forename: J F
authors.initials: JF
authors.lastname: Luciani
authors.affiliation: Service de cardiologie, hôpital d'instruction des armées Desgenettes, 108, boulevard Pinel, 69275 Lyon cedex 03, France.
authors.forename: C
authors.initials: C
authors.lastname: Ertzscheid
authors.affiliation: Service de cardiologie, hôpital d'instruction des armées Desgenettes, 108, boulevard Pinel, 69275 Lyon cedex 03, France.
authors.forename: D
authors.initials: D
authors.lastname: Mioulet
authors.affiliation: Unité 31, hôpital cardiologique Louis-Pradel, 28, avenue du Doyen-Lépine, 69500 Bron, France.
authors.forename: F
authors.initials: F
authors.lastname: Farhat
authors.affiliation: Service de cardiologie, hôpital de la Croix-Rousse, 103, boulevard de la Croix-Rousse, 69004 Lyon, France.
authors.forename: P
authors.initials: P
authors.lastname: Lantelme
mesh_terms: D000293:Adolescent; D000465:Algorithms; D056352:Athletes; D002648:Child; D016757:Death, Sudden, Cardiac / Q000517:prevention & control; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D012016:Reference Values
keywords: Bazett; Intervalle QT; Jeune athlète; QT interval; Young athlete