biostudies-literatureUnknown47Yee-Ming Li J<h4>Background</h4>Apple watch-derived electrocardiogram (awECG) may help identify prolongation of corrected QT (QTc) interval. This study aimed to determine its usefulness for assessment of prolongation of QTc interval in children and adolescents with long QT syndrome (LQTS).<h4>Methods</h4>Children and adolescents with and without LQTS were recruited for measurement of QTc intervals based on standard 12-lead (sECG) and awECG lead I, II and V5 tracings. Bland-Altman analysis of reproducibility, concordance assessment of T wave morphologies, and receiver operating characteristic (ROC) analysis of sensitivity and specificity of awECG-derived QTc interval for detecting QTc prolongation were performed.<h4>Results</h4>Forty-nine patients, 19 with and 30 without LQTS, aged 3-22 years were studiInternational journal of cardiology. Heart & vasculature101232https://www.ebi.ac.uk/biostudies/studies/S-EPMC10279543biostudies-literatureDetection of QT interval prolongation using Apple Watch electrocardiogram in children and adolescents with congenital long QT syndrome.PMC10279543Yee-Ming Li JCheung YFHing-Sang Wong WTsao SHoi-Yan Chung CKwok SYfalseDetection of QT interval prolongation using Apple Watch electrocardiogram in children and adolescents with congenital long QT syndrome.<h4>Background</h4>Apple watch-derived electrocardiogram (awECG) may help identify prolongation of corrected QT (QTc) interval. This study aimed to determine its usefulness for assessment of prolongation of QTc interval in children and adolescents with long QT syndrome (LQTS).<h4>Methods</h4>Children and adolescents with and without LQTS were recruited for measurement of QTc intervals based on standard 12-lead (sECG) and awECG lead I, II and V5 tracings. Bland-Altman analysis of reproducibility, concordance assessment of T wave morphologies, and receiver operating characteristic (ROC) analysis of sensitivity and specificity of awECG-derived QTc interval for detecting QTc prolongation were performed.<h4>Results</h4>Forty-nine patients, 19 with and 30 without LQTS, aged 3-22 years were studi2023-01-01T00:00:00Z2023 Aug2025-04-05T13:54:58.119Z2025-04-05T13:54:58.119ZS-EPMC102795433734623210.1016/j.ijcha.2023.101232