The present invention relates to a system comprising a catheter configured to be inserted into a heart cavity having an endocardium surface and to move to each of multiple positions in the heart cavity, the catheter comprising multiple, spatially distributed electrodes, the multiple electrodes configured to measure signals in response to electrical activity in the heart cavity, a device configured to determine, for each of the different catheter positions, the positions of the catheter electrodes with respect to the endocardium surface, a processing unit configured to determine physiological information at multiple locations of the endocardium surface based on the determined positions of the catheter electrodes and the measured signals at the different catheter positions, the determination being based at least in part on a mathematical operator and a synchronization unit configured to synchronize the signals measured at the different catheter positions with one another according to an electric heart beat cycle.
