1. A method of mapping cardiac tissue, comprising: recording a base cardiac electrogram signal at a base electrode for a predetermined amount of time; recording a plurality of cardiac electrogram signals at a plurality of electrodes other than the base electrode for the predetermined amount of time simultaneously with recording a base electrogram signal at the base electrode, each of the plurality of electrodes other than the base electrode being within a predetermined distance from the base electrode; determining a plurality of different correlation coefficients, each of the plurality of correlation coefficients corresponding to the base cardiac electrogram signal and a different one of the plurality of cardiac electrogram signals; averaging the plurality of correlation coefficients to generate a correlation coefficient average for the base electrode based on the spatial relationship between the base electrode and the plurality of electrodes other than the base electrode; associating the correlation coefficient average to the specific area of cardiac tissue where the base electrode is positioned; and mapping the specific area of cardiac tissue where the base electrode is positioned to the average of the plurality of correlation coefficients.