Many real systems contain large number of degrees of freedom and in general, their outcomes are stochastics. To understand such systems, one can apply stochastic differential equations, that used by Einstein to describe Brownian motion, for the first time. These equations are very important in statistical physics. In this article, we demonstrate that Kramers-Moyal coefficients corresponding to the jump-diffusion equation of a normal person and a person with heart failure are different. This indicates that there is a complete different dynamics governing these two states, and one can use this method to diagnosis of heart failure in human body.