Abstract: A computer program storage medium readable by a computing system and encoding a computer program of instructions for executing a computer process for the treatment of data obtained from synchronized electrocardiogram tomoscintigraphy, said data being correlated to image giving the activity of a heart comprising auricles, ventricles, valves and septum, said image comprising at least: (a) a first portion consisting of the pixels showing the auricles and ventricles during the cardiac cycle, each cycle comprising successive time bins with an end-systole time and end-diastole time, and (b) a second portion consisting of pixels substantially not involved with said cardiac activity.