Abstract:
Medical devices and methods for using medical devices are disclosed. An example mapping medical device may include a catheter shaft with a plurality of electrodes. The plurality of electrodes may include a first pair of electrodes, a second pair of electrodes, a third pair of electrodes and a fourth pair of electrodes. The mapping medical device may further include a processor, wherein the processor may be configured to determine a first latency between the first pair of electrodes, determine a second latency between the second pair of electrodes, determine a third latency between the third pair of electrodes, determine a fourth latency between the fourth pair of electrodes, and determine a target signal by interpolating the first latency, the second latency, the third latency and the fourth latency.
Abstract:
A system and method for mapping an anatomical structure includes sensing activation signals of physiological activity with a plurality of mapping electrodes disposed in or near the anatomical structure. Patterns among the sensed activation signals are identified based on a similarity measure generated between each unique pair of identified patterns which are classified into groups based on a correlation between the corresponding pairs of similarity measures. A characteristic representation is determined for each group of similarity measures and displayed as a summary plot of the characteristic representations.
Abstract:
A method for mapping an anatomical structure includes sensing activation signals of intrinsic physiological activity with a plurality of electrodes disposed in or near the anatomical structure, identifying at least one of the electrodes not in direct contact with the anatomical structure, and adjusting the activation signals sensed by each of the plurality of electrodes based on the activation signals sensed by the identified at least one of the electrodes not in direct contact with the anatomical structure.
Abstract:
An anatomical mapping system and method includes mapping electrodes configured to detect activation signals of cardiac activity. A processing system is configured to record the detected activation signals and generate a vector field for each sensed activation signal during each instance of the physiological activity. The processing system determines an onset time and alternative onset time candidates, identifies an initial vector field template based on a degree of similarity between the initial vector field and a vector field template from a bank of templates, then determines an optimized onset time for each activation signal based on a degree similarity between the onset time candidates and initial vector field template.
Abstract:
An anatomical mapping system including a plurality of mapping electrodes disposed in or near an anatomical structure and configured to detect activation signals of physiological activity, each of the plurality of mapping electrodes having an electrode location, and a processing system associated with the plurality of mapping electrodes, and configured to record the detected activation signals and associate one of the plurality of mapping electrodes with each recorded activation signal. The processing system further configured to determine a dominant frequency at each electrode location, and determine a wavefront vector at each electrode location based on a difference between the dominant frequency at a first electrode location and the dominant frequency at neighboring electrode locations.
Abstract:
A method for mapping a cardiac chamber includes sensing activation signals of intrinsic physiological activity with a plurality of electrodes disposed in or near the cardiac chamber, the activation signals including a near-field activation signal component and a far-field activation signal component, isolating R-wave events in the activation signals, generating a far-field activation template representative of the far-field activation signal component based on the R-wave events, and filtering the far-field activation template from the activation signals to identify the near-field activation signal components in the activation signals.
Abstract:
An anatomical mapping system includes a plurality of mapping electrodes each having an electrode location and configured to detect activation signals of intrinsic physiological activity within an anatomical structure. A mapping processor is associated with the plurality of mapping electrodes and is configured to record the detected activation signals and associate one of the plurality of mapping electrodes with each recorded activation signal. The mapping processor is further configured to analyze the recorded activation signals to identify at least one recurring pattern based on a relationship between a timing of the detected activation signals and the electrode locations of the mapping electrode associated with each detected activation signal.
Abstract:
A catheter system includes a mapping catheter including a plurality of mapping electrodes, each mapping electrode configured to sense signals associated with an anatomical structure. The catheter system further includes a processor operatively coupled to the plurality of mapping electrodes and configured to receive the signals sensed by the plurality of mapping electrodes, characterize the signals sensed by the plurality of mapping electrodes based on amplitudes of the sensed signals, and generate an output of a quality of contact of the plurality of mapping electrodes with the anatomical structure based on the signal characterization.
Abstract:
A catheter system includes a mapping catheter having a plurality of splines, each of the plurality of splines including a plurality of mapping electrodes. The system further includes a processor operatively coupled to the plurality of mapping electrodes and configured to receive signals sensed by the plurality of mapping electrodes. The processor is further configured to estimate an interspline distance between adjacent splines in the plurality of splines based on the signals sensed by the mapping electrodes on the adjacent splines.
Abstract:
An anatomical mapping system including a plurality of mapping electrodes disposed in or near an anatomical structure and configured to detect activation signals of physiological activity, each of the plurality of mapping electrodes having an electrode location, and a processing system associated with the plurality of mapping electrodes, and configured to record the detected activation signals and associate one of the plurality of mapping electrodes with each recorded activation signal. The processing system further configured to determine a dominant frequency at each electrode location, and determine a wavefront vector at each electrode location based on a difference between the dominant frequency at a first electrode location and the dominant frequency at neighboring electrode locations.