| abstract |
(57) [Summary] [Problem] To create a potential mapping. A method of mapping electrical activity of the heart includes inserting a probe into a chamber of the heart, the probe including at least one position sensing device and a plurality of non-contact electrodes. The position coordinates of the electrodes are determined using at least one position detection device as the position of the chamber relative to the endocardial surface, and the potential is measured using the electrodes at the determined position coordinates. The electric potential is calculated at a plurality of points on the endocardial surface using the measured electric potential and the position coordinates, thereby creating an electric activity map of the entire endocardial surface based on the calculated electric potential. |