Should the JT rather than the QT interval be used to detect prolongation of ventricular repolarization?

Zhou, Sophia H.; Wong, Shirley; Rautaharju, Pentti M.; Karnik, Nachiket; Calhoun, Harry P.

doi:10.1016/0022-0736(92)90079-f

Cited by 75 publications

(44 citation statements)

References 6 publications

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“…For primary QT interval analyses, we excluded individuals with QRS Ն120 ms (bundle branch block; n ϭ 400). We also evaluated a modified QTI in which QTI was replaced with the JT index for individuals with QRS Ն120 ms (25). We also evaluated a corrected QT interval (QTc) using Karjalainen's nomogram (26), excluding individuals with QRS Ն120 ms and also those with HRs outside the nomogram range (Յ39 or Ն121 beats/min; n ϭ 23).…”

Section: Methodsmentioning

confidence: 99%

Dietary Fish and n-3 Fatty Acid Intake and Cardiac Electrocardiographic Parameters in Humans

Mozaffarian

Prineas

Stein

et al. 2006

Journal of the American College of Cardiology

112

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Section: Methodsmentioning

confidence: 99%

Dietary Fish and n-3 Fatty Acid Intake and Cardiac Electrocardiographic Parameters in Humans

Mozaffarian

Prineas

Stein

et al. 2006

Journal of the American College of Cardiology

112

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“…El mismo evaluaba la 1,7,67 coexistencia de ensanchamiento del QRS o preexcitacion ventricular . Se observó que en 19% de los casos el mismo se encontraba prolongado (>0,34 seg).…”

Section: Diagnósticosunclassified

Intervalo QTc prolongado en pacientes adultos

Cañete

2015

Rev. Virtual Soc. Parag. Med. Int

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“…The heart ratecorrected JT (JTc) interval has been proposed as a more appropriate measure of ventricular repolarization than the QTc interval in individuals with the increased QRS duration. 8,9 The aim of the study was to determine length values of the QTc and JTc intervals, the corrected QT and JT interval index, and some biochemical risk factors for atherosclerosis in a sample of healthy university students of both sexes, physically fit and ready to be subjected to high physical loads during their study course of kinesiology. The task was to compare findings of competitive student athletes and noncompetitive sport participants and to ascertain the number and percentage of young athletes and noncompetitive sport participants, who display longer or shorter QT and JT intervals, according to the ESC criteria 1 and the Seattle criteria for the ECG interpretation in athletes.…”

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confidence: 99%

Heart Rate–Corrected QT and JT Intervals in Electrocardiograms in Physically Fit Students and Student Athletes

Mišıgoj-Duraković

Duraković²,

Prskalo³

2016

Noninvasive Electrocardiol

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In literature, data on the prevalence of prolonged and shortened corrected QT (QTc) have shown considerable variability. The aim of the study was to compare QTc and JTc intervals of competitive student athletes and noncompetitive sport participants to QTc cutoff points used in athletes. A group of 485 physically fit candidates for the study of kinesiology (139 female and 346 male candidates) aged 18-20 participated in the study. Basic anthropometry, field fitness test, cardiovascular, electrocardiograms measurements, and blood sampling for lipid profile were conducted. The prolonged QTc according to European Society of Cardiology criteria was found in 2.9% of female and 4.3% of male students. When the "Seattle criteria" were used, the proportion of prolonged QTc was 1.44% in female and 0.29% in male students. The shortened QTc according to the Seattle cutoff points was presented in 0.7% of female and 2.0% of male students. The JTc over 400 ms was found in 0.72% of female and 0.29% of male students. The JTc shorter than 320 ms was presented in 0.7% of female and 1.1% of male students. No significant differences were found between students involved in competitive sport and those involved in recreational sporting activities. Female students had lower body mass index and blood pressure values, better blood lipid profile, and lower uric acid concentrations. In conclusion, the Seattle criteria markedly decreased the proportion of prolonged QTc in student athletes, particularly in male students. It seems that the JTc interval could be a better parameter than the QTc interval for the estimation of specific repolarization time in physically fit university students.

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Should the JT rather than the QT interval be used to detect prolongation of ventricular repolarization?

Cited by 75 publications

References 6 publications

Dietary Fish and n-3 Fatty Acid Intake and Cardiac Electrocardiographic Parameters in Humans

Dietary Fish and n-3 Fatty Acid Intake and Cardiac Electrocardiographic Parameters in Humans

Intervalo QTc prolongado en pacientes adultos

Heart Rate–Corrected QT and JT Intervals in Electrocardiograms in Physically Fit Students and Student Athletes

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