Also, even in those cases where QT
dispersion is abnormal, its clinical usefulness is limited. However, a QT
dispersion of 34 seconds is still well within normal range and an increase within normal ranges is not concerning.
Finally, left ventricular hypertrophy is a diagnosis made by imaging (like echocardiogram, ventriculogram, CT scan, cardiac MRI). ECG is a screening tool for LVH, but false positives are not uncommon for LVH.