Enhanced activation onset time optimization by similarity based pattern matching

摘要

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.

主权项

1. A method for mapping an anatomical structure, the method comprising:
sensing activation signals during an instance of physiological activity with a plurality of mapping electrodes disposed in or near the anatomical structure; generating a vector field for each sensed activation signal during each instance of the physiological activity; determining an onset time and alternative onset time candidates for each activation signal; identifying a vector field pattern template for each activation signal based on a degree of similarity between the generated vector field and at least one vector field template pattern; determining an optimized onset time for each activation signal based on the corresponding onset time candidates and the vector field pattern template; generating an updated vector field for each sensed activation signal based on the optimized onset time for each activation signal; and updating the identified vector field pattern template based on the sensed activation signals.