System and method for three-dimensionally mapping heart by using sensing information of catheter

A three-dimensional (3D) heart mapping method, comprising:

• step (a) of measuring a physiological response from an electrode exposed on a surface of a mapping catheter, wherein the mapping catheter includes an optical fiber having a plurality of fiber Bragg gratings (FBGs) disposed in a lengthwise direction of a catheter body, wherein the spacing between the adjacent fiber Bragg gratings of the plurality of fiber Bragg gratings arranged along the catheter body increases in a distal direction of the catheter body;
• step (b) of calculating coordinates of the plurality of FBGs located on a same cross section as the electrode from which the physiological response is measured in step (a);
• step (c) of calculating a coordinate of the electrode from which the physiological response is measured, from the coordinates of the plurality of FBGs calculated in step (b);
• and
• step (d) of constructing a 3D shape of a heart by sampling the coordinate of the electrode calculated in step (c).

A mapping catheter comprising:

• a catheter body having a first area defined by a path in which at least one channel is formed, and a second area defined by a front end at which a tip to be condensed as an external force is applied is provided;
• an optical fiber penetrating in the at least one channel and having a plurality of fiber Bragg gratings (FBG)s disposed in a lengthwise direction of the catheter body, wherein the spacing between the adjacent fiber Bragg gratings of the plurality of fiber Bragg gratings arranged along the catheter body increases in a distal direction of the catheter body;
• and
• a plurality of electrodes exposed on a surface of the catheter body and disposed in the lengthwise direction of the catheter body,
• wherein the FBGs are configured to sense a shape of the catheter body on which the electrodes are located based on optical wavelength information associated with optical wavelengths that change when the catheter body is configured to come into contact with an inner wall of a heart.