Comparison of ventricular depolarization and repolarization in autocorrelation maps of healthy children

摘要

The aim of this retrospective study was to analyze the electrocardiographic autocorrelation maps (ACMs) in young people during the time standardized QRST interval assuming some repetition of QRS patterns during the ST interval. We constructed 41 isopotential maps (IPMs) at equidistant intervals (per 20 intervals during QRS complex and ST interval) for 52 children controls (24 boys), mean age (13.6 ± 0.4) years. For each QRST interval, every IPM was compared with every IPM using Pearson's correlation coefficient r. These values were displayed in the form of ACMs. We evaluated only that part of each ACM where the QRS and ST maps were compared, that is 21 QRS IPMs versus 21 ST IPMs. The mean correlation coefficients of single ACMs were 0.054 ± 0.112. The very high positive correlation r ≥ 0.900 covered in average (11 ± 9) % with average value 0.939 ± 0.013. Negative correlations r <; 0.000 occurred relatively symmetrically at the ACM borders with the mean value -0.472 ± 0.094 and covered in average (52 ± 9) % of the whole ACM area. From our results follows that the isopotential distribution pattern of the QRS complex is more often repeated in a positive way during the ST interval in girls than in boys.