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Centile rainbow plots for heart rate (top left panel), P wave duration (right panel), PR (mid-left panel), QRS (mid-right panel), QT (bottom left panel), and QTc (bottom right panel), expressed as median and quartile and age ranges. (A) Heart rate. (B) P wave duration. (C) PR duration. (D) QRS duration. (E) QT duration. (F) QTc duration.
