text_1: Five-year-old boy seen by my partner for kindergarten physical, mentioned he had been having some chest pain.  Got an electrocardiogram which showed a QTc (corrected QT interval) of 440 milliseconds, otherwise normal electrocardiogram.  "Any further workup needed?"
text_2: Is any workup needed for a QTc (corrected QT interval) of 440 milliseconds?