Method for monitoring the stimulation frequency of an ICMD device as a cardiac signal changes, comprising the steps of a) determining (10) generation parameters for a reference cardiac signal generating (12) said reference cardiac signal based on said parameters by progressively increasing its amplitude, at the end of successive acquisition intervals (H), until a maximum amplitude (Amax) is reached comparing (18) the amplitude of a current cardiac signal with the maximum amplitude value (Amax) of the reference cardiac signal and, if the two values coincide, terminating the method otherwise, increasing the amplitude of the reference cardiac signal by the predetermined value (ΔA) and repeating steps a)- c).
