This invention relates to the determination and/or representation of physiological information relating to a heart surface. An exemplary method includes inserting a catheter into a heart cavity, the catheter comprising one or more electrodes and moving the catheter to each of multiple, different positions in the heart cavity. The method also includes, for each catheter positions, concurrently measuring signals at the catheter electrodes in response to electrical activity in the heart cavity and collecting a plurality of additional data signals. The method also includes defining a template set comprising additional data signals collected during an exemplary beat of interest, computing criteria for the additional data signals based on a comparison of the additional data signals and the template set, and synchronizing the signals measured at the different catheter positions with one another according to a heart beat cycle by calculating a single synchronization offset based on the computed criteria.
