  In this paper, we have used the concepts of the fractional derivative of
rough curves to characterize ECG of LVH patients and compared the results with
normal ECGs. In mathematical language, an ECG is a rough curve having Q, R, S
points as non-differentiable points where classical derivatives do not exist
but fractional derivatives exist. We have calculated both left and right
modified Riemann-Liouville fractional derivatives and their differences termed
as phase transition at those non-differentiable points of V1, V2, V5, and V6
leads.Investigation shows that phase transition is higher for LVH patients than
normal ones. This may be a method of determination of risk factor of LVH
patients before doing Echocardiogram.
