Abstract: An electrophysiology map, for example a map of arrhythmic substrate, can be generated by acquiring both geometry information and electrophysiology information pertaining to an anatomical region, and associating the acquired geometry and electrophysiology information as a plurality of electrophysiology data points. A user can select two (or more) electrophysiological characteristics for display, and can further elect to apply various filters to the selected electrophysiological characteristics. The user can also define various relationships (e.g., Boolean ANDs, ORs, and the like) between the selected and/or filtered characteristics. The user-selected filtering criteria can be applied to the electrophysiology data points to output various subsets thereof. These subsets can then be graphically rendered using various combinations of colorscale, monochrome scale, and iconography, for example as a three-dimensional cardiac electrophysiology model.

Abstract: The local conduction velocity of a cardiac activation wavefront can be computed by collecting a plurality of electrophysiology (“EP”) data points using a multi-electrode catheter, with each EP data point including both position data and local activation time (“LAT”) data. For any EP data point, a neighborhood of EP data points, including the selected EP data point and at least two additional EP data points, can be defined. Planes of position and LATs can then be defined using the positions and LATs, respectively, of the EP data points within the neighborhood. A conduction velocity can be computed from an intersection of the planes of positions and LATs. The resultant plurality of conduction velocities can be output as a graphical representation (e.g., an electrophysiology map), for example by displaying vector icons arranged in a uniform grid over a three-dimensional cardiac model.

Abstract: An electrophysiology map, for example a map of arrhythmic substrate, can be generated by acquiring both geometry information and electrophysiology information pertaining to an anatomical region, and associating the acquired geometry and electrophysiology information as a plurality of electrophysiology data points. A user can select two (or more) electrophysiological characteristics for display, and can further elect to apply various filters to the selected electrophysiological characteristics. The user can also define various relationships (e.g., Boolean ANDs, ORs, and the like) between the selected and/or filtered characteristics. The user-selected filtering criteria can be applied to the electrophysiology data points to output various subsets thereof. These subsets can then be graphically rendered using various combinations of colorscale, monochrome scale, and iconography, for example as a three-dimensional cardiac electrophysiology model.

Abstract: The local conduction velocity of a cardiac activation wavefront can be computed by collecting a plurality of electrophysiology (“EP”) data points using a multi-electrode catheter, with each EP data point including both position data and local activation time (“LAT”) data. For any EP data point, a neighborhood of EP data points, including the selected EP data point and at least two additional EP data points, can be defined. Planes of position and LATs can then be defined using the positions and LATs, respectively, of the EP data points within the neighborhood. A conduction velocity can be computed from an intersection of the planes of positions and LATs. The resultant plurality of conduction velocities can be output as a graphical representation (e.g., an electrophysiology map), for example by displaying vector icons arranged in a uniform grid over a three-dimensional cardiac model.

Abstract: A system for presenting information representative of patient electrophysiological activity, such as complex fractionated electrogram information, includes at least one electrode to measure electrogram information from the heart surface, at least one processor coupled to the at least one electrode to receive the electrogram information and measure a location of the at least one electrode within the heart, and a presentation device to present the electrogram information as associated with the location at which it was measured on a model of the patient's heart. A memory may also be provided in which to store the associated electrogram information and measured location. Data may be analyzed using both time-domain and frequency-domain information to create a three-dimensional map. The map displays the data as colors, shades of color, and/or grayscales, and may further utilize contour lines, such as isochrones, to present the information.

Abstract: A system for presenting information representative of patient electrophysiological activity, such as complex fractionated electrogram information, includes at least one electrode to measure electrogram information from the heart surface, at least one processor coupled to the at least one electrode to receive the electrogram information and measure a location of the at least one electrode within the heart, and a presentation device to present the electrogram information as associated with the location at which it was measured on a model of the patient's heart. A memory may also be provided in which to store the associated electrogram information and measured location. Data may be analyzed using both time-domain and frequency-domain information to create a three-dimensional map. The map displays the data as colors, shades of color, and/or grayscales, and may further utilize contour lines, such as isochrones, to present the information.

Abstract: A system for presenting information representative of patient electrophysiological activity, such as complex fractionated electrogram information, includes at least one electrode to measure electrogram information from the heart surface, at least one processor coupled to the at least one electrode to receive the electrogram information and measure a location of the at least one electrode within the heart, and a presentation device to present the electrogram information as associated with the location at which it was measured on a model of the patient's heart. A memory may also be provided in which to store the associated electrogram information and measured location. Data may be analyzed using both time-domain and frequency-domain information to create a three-dimensional map. The map displays the data as colors, shades of color, and/or grayscales, and may further utilize contour lines, such as isochrones, to present the information.

Abstract: A system for presenting information representative of patient electrophysiological activity, such as complex fractionated electrogram information, includes at least one electrode to measure electrogram information from the heart surface, at least one processor coupled to the at least one electrode to receive the electrogram information and measure a location of the at least one electrode within the heart, and a presentation device to present the electrogram information as associated with the location at which it was measured on a model of the patient's heart. A memory may also be provided in which to store the associated electrogram information and measured location. Data may be analyzed using both time-domain and frequency-domain information to create a three-dimensional map. The map displays the data as colors, shades of color, and/or grayscales, and may further utilize contour lines, such as isochrones, to present the information.

Abstract: A medical system for finding and displaying the location of electrodes within the body. The electrodes may be used to measure the voltage on the heart wall and display this as an activation map on a geometry representing the heart chamber.

Abstract: An electrophysiology apparatus is used to measure electrical activity occurring in a heart of a patient and to visualize the electrical activity and/or information related to the electrical activity. A three-dimensional map of the electrical activity and/or the information related to the electrical activity is created.

Abstract: A medical system for finding and displaying the location of electrodes within the body. The electrodes may be used to measure the voltage on the heart wall and display this as an activation map on a geometry representing the heart chamber.