Abstract: Methods and systems for determining the position of an object, such as tracking the position of one or more catheters in a patient's heart cavity are disclosed herein.

Abstract: In general, in one aspect, a method is disclosed for determining information about a position of an object. The method includes: (i) causing current to flow between each of three or more sets of current-injecting electrodes on a first catheter inserted into an organ in a patient's body, the organ having a periphery (ii) in response to current flow caused by each set of current injecting electrodes, measuring an electrical signal at each of one or more measuring electrodes located on one or more additional catheters inserted into the organ in the patient's body and (iii) determining the position of each of one or more of the measuring electrodes on the additional catheters relative to the first catheter based on the measured signals from the one or more measuring electrodes.

Abstract: Methods and systems for the determination and representation of anatomy anatomical information are disclosed herein.

Abstract: This invention relates to the determination and/or representation of physiological information relating to a heart surface.

Abstract: This invention relates to the determination and/or representation of physiological information relating to a heart surface.

Abstract: This invention relates to the determination and/or representation of physiological information relating to a heart surface.

Abstract: This invention relates to the determination and/or representation of physiological information relating to a heart surface.

Abstract: In some aspects, a method includes (i) securing multiple sets of current injecting electrodes to an organ in a patient's body, (ii) causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ, (iii) in response to current flow caused by the multiple sets of current injecting electrodes, measuring the field at each of one or more additional electrodes, (iv) determining expected signal measurements of the field inside the organ using a pre-determined model of the field, and (v) determining a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field.

Abstract: Methods and systems for the determination and representation of a chamber anatomy are disclosed herein.

Abstract: In some aspects, a method includes (i) causing current to flow among multiple sets of current injecting electrodes to generate a field in an organ, (ii) obtaining the positions of one or more measuring electrodes used for measuring the field generated by the current injecting electrodes, (iii) in response to the current flow, measuring the field at multiple locations in the organ using the one or more measuring electrodes, (iv) modeling the field using the measurements of the field from the one or more measuring electrodes and the positions of the one or more measuring electrodes, and (v) determining expected signal measurements of the field at additional locations within the organ using the model of the field.

Abstract: A multi electrode catheter for non contact mapping of the heart having independent articulation and deployment features.

Abstract: In some aspects, a method includes (i) securing multiple sets of current injecting electrodes to an organ in a patient's body, (ii) causing current to flow among the multiple sets of current injecting electrodes to generate a field in the organ, (iii) in response to current flow caused by the multiple sets of current injecting electrodes, measuring the field at each of one or more additional electrodes, (iv) determining expected signal measurements of the field inside the organ using a pre-determined model of the field, and (v) determining a position of each of the one or more additional electrodes in the organ based on the measurements made by the additional electrodes and the determined expected signal measurements of the field.

Abstract: A multi electrode catheter for non contact mapping of the heart having independent articulation and deployment features.

Abstract: Methods and systems for the determination and representation of anatomical information are disclosed herein. In some examples, methods described herein can include determining a boundary of at least a portion of the heart based on measured electrical signals, determining an area of the boundary corresponding to an endocardial boundary, and displaying a portion of the boundary of the heart with the display including a visual indicia indicative of the determined area of the boundary.

Abstract: Methods and systems for determining the position of an object, such as tracking the position of one or more catheters in a patient's heart cavity are disclosed herein.

Abstract: Methods and systems for determining whether a location of multiple current injecting electrodes has changed are disclosed herein.

Abstract: In some aspects, a method includes measuring unipolar signals at one or more electrodes in response to electrical activity in a heart cavity. The method also includes determining, based at least in part on Laplace's equation, bipolar physiological information at multiple locations of an surface based on the measured unipolar signals and positions of the one or more electrodes with respect to the surface.

Abstract: A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.

Abstract: A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.

Abstract: A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.