biostudies-literaturevan den Berg MEZonMw1272https://www.ebi.ac.uk/biostudies/studies/S-EPMC6788348biostudies-literatureUnknown10Aims: QT variability is a promising electrocardiographic marker. It has been studied as a screening tool for coronary artery disease and left ventricular hypertrophy, and increased QT variability is a known risk factor for sudden cardiac death. Considering that comprehensive normal values for QT variability were lacking, we set out to establish these in standard 10-s electrocardiograms (ECGs) covering both sexes and all ages. Methods: Ten-second, 12-lead ECGs were provided by five Dutch population studies (Pediatric Normal ECG Study, Leiden University Einthoven Science Project, Prevention of Renal and Vascular End-stage Disease Study, Utrecht Health Project, Rotterdam Study). ECGs were recorded digitally and processed by well-validated analysis software. We selected cardiologically healthyFrontiers in physiologyNormal Values of QT Variability in 10-s Electrocardiograms for all Ages.PMC6788348113102005van den Berg MESwenne CAKors JAvan Herpen GRijnbeek PRHillege HStricker BHBots MLfalseNormal Values of QT Variability in 10-s Electrocardiograms for all Ages.Aims: QT variability is a promising electrocardiographic marker. It has been studied as a screening tool for coronary artery disease and left ventricular hypertrophy, and increased QT variability is a known risk factor for sudden cardiac death. Considering that comprehensive normal values for QT variability were lacking, we set out to establish these in standard 10-s electrocardiograms (ECGs) covering both sexes and all ages. Methods: Ten-second, 12-lead ECGs were provided by five Dutch population studies (Pediatric Normal ECG Study, Leiden University Einthoven Science Project, Prevention of Renal and Vascular End-stage Disease Study, Utrecht Health Project, Rotterdam Study). ECGs were recorded digitally and processed by well-validated analysis software. We selected cardiologically healthy2019-01-01T00:00:00Z20192025-04-18T13:21:38.508Z2019-11-05T08:05:25ZS-EPMC67883483163657210.3389/fphys.2019.01272