AIMS: The study was designed to detect changes in corrected QT intervals over day and night in both sexes in healthy children. METHODS AND RESULTS: The corrected QT interval was calculated from 24 h ECGs obtained from 282 healthy children aged 6 months to 18 years. The QTc interval as measured by the 24 h recording differs to the standard ECG measurement which is in average of 40-50 ms shorter. The QTc interval changes little over a 24 h period and is remarkably constant despite significant heart rate changes in healthy children. CONCLUSION: The routine ECG-even if the calculated values differ markedly from those obtained over 24 h-seems to be a good screening method for the measurement of corrected QT intervals, because the corrected QT interval is kept constant over the whole day in healthy children.
AIMS: The study was designed to detect changes in corrected QT intervals over day and night in both sexes in healthy children. METHODS AND RESULTS: The corrected QT interval was calculated from 24 h ECGs obtained from 282 healthy children aged 6 months to 18 years. The QTc interval as measured by the 24 h recording differs to the standard ECG measurement which is in average of 40-50 ms shorter. The QTc interval changes little over a 24 h period and is remarkably constant despite significant heart rate changes in healthy children. CONCLUSION: The routine ECG-even if the calculated values differ markedly from those obtained over 24 h-seems to be a good screening method for the measurement of corrected QT intervals, because the corrected QT interval is kept constant over the whole day in healthy children.
Authors: Abu Shamsuzzaman; Raouf S Amin; Christelle van der Walt; Diane E Davison; Aynur Okcay; Gregg S Pressman; Virend K Somers Journal: Sleep Breath Date: 2015-03-04 Impact factor: 2.816
Authors: Marek Malik; Katerina Hnatkova; Donna Kowalski; James J Keirns; E Marcel van Gelderen Journal: Am J Physiol Heart Circ Physiol Date: 2013-10-25 Impact factor: 4.733