METHODS FOR SIMULTANEOUS CARDIAC SUBSTRATE MAPPING USING SPATIAL CORRELATION MAPS BETWEEN NEIGHBORING UNIPOLAR ELECTROGRAMS

摘要

A base cardiac electrogram signal at a base electrode is recorded for a predetermined amount of time. A plurality of cardiac electrogram signals at a plurality of electrodes other than the base electrode are recorded for the predetermined amount of time. The base cardiac electrogram signal is compared with each of the plurality of cardiac electrogram signals. The similarities between the base cardiac electrogram signal and each of the plurality of cardiac electrogram signals is determined. A specific area of cardiac tissue where the base electrode is positioned is mapped based at least in part on the determined similarities.

主权项

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.