In this paper we applied a chaos control method based on technique integro-differential equations for stabilization of unstable cardiac rhythm, which is described by the mathematical model of the modified Van der Pol equation. Chaos control with this method may be useful for stabilization irregular heartbeat using a small perturbation. This method differs from other stabilization strategies by the absence of adjustable parameters and the lack of rough approximations in determining control functions whose control parameters are fixed by the properties of the unstable system itself.