Abstract: Method for generating an activation map indicative of a time propagation of an action potential wavefront in a heart of a patient, the method being executed by a control unit and comprising the steps of: acquiring measured electrocardiography, ECG, data of the patient; generating, based on white noise, at least one set of identification parameters, each set of identification parameters identifying respective random ECG data and a respective random activation map that is indicative of a respective time propagation of a random action potential wavefront in the heart of the patient; generating, based on each set of identification parameters, said respective random ECG data; comparing the random ECG data and the measured ECG data to determine if there is correspondence between them; and if there is correspondence between the random ECG data and the measured ECG data, generating the activation map based on the at least one random activation map determined based on the at least one set of identification parameters