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A proposed method for the calculation of age-dependent QRS duration z-scores. Journal of electrocardiology Chubb, H. n., Ceresnak, S. R., Motonaga, K. S., Dubin, A. M. 2019; 58: 132–34

Abstract

There are currently no published algorithms for calculation of age-dependent QRS duration z-scores. The absence of a standardized measure has limited researchers' abilities to compare ECG measurements of electrical synchrony between subjects of different ages or longitudinally over time.Four existing studies of normal ECG measurements (total 19,062 subjects) were used to estimate age and sex-dependent means and standard deviations.Weighted means and standard deviations were best estimated by cubic functions to create z-score algorithms.Nomograms and algorithms for QRS duration z-scores may be estimated to compare ECG findings in both children and adults.

View details for DOI 10.1016/j.jelectrocard.2019.12.004

View details for PubMedID 31846856