St. Jude Medical, Cardiology Division, Inc.

Thomas P Hartley

Don Curtis Deno

Dennis J Morgan

Steve Kim

Fikri Goksu

Emma K Davis

Mark Hagfors

Electrophysiological activity can be mapped using sub-intervals of electrophsyiological signals. An electroanatomical mapping system receives a plurality of electrophsyiological signals (), each of which spans an activation interval. For each signal, the system identifies an initial event time within the activation interval, such as by identifying a time of maximum signal energy (), and defines a sub-interval about the initial event time (). The system then analyzes the sub-interval to identify one or more electrophysiological characteristics of the electrophysiological signal () and adds a corresponding electrophysiology data point to an electrophysiology map (). Advantageously, the sub-interval can extend outside of the activation interval, such that the instant teachings allow for capture and analysis of deflections that occur at or near the boundaries of the activation interval.

System and method for cardiac mapping

Arrhythmic foci and other driver sites can be mapped using a multi-dimensional catheter. For instance, using a clique of three or more electrodes on the multi-dimensional catheter, an electroanatomical mapping system can identify a maximum bipolar voltage and an average unipolar voltage. The ratio of the average unipolar voltage to the maximum bipolar voltage can be interpreted as an indication of whether a cardiac location is an arrhythmic focus. Alternatively, an evaluation region can be defined about location in the patient's heart. The evaluation includes a plurality of rods, each associated with a respective E-field loop having a respective maximum and minimum amplitude bipole axes, with the rods being defined by the maximum amplitude bipole axes. For a sufficient number of rods within the evaluation region, a focus score for the evaluation region can be computed to reflect rod orientation consistency within the evaluation region.

System and method for mapping arrhythmic driver sites

Systems and methods for generating and displaying an electrophysiology (EP) map are provided. A system includes a device including at least one sensor configured to collect a set of location data points, and a computer-based model construction system coupled to the device and configured to generate a geometry surface model from the set of location data points, associate an EP parameter with each of a plurality of points on the geometry surface model to generate an EP map, calculate a confidence metric for the EP parameter associated with each point, and display the EP map based on the calculated confidence metrics.

Growing community of inventors

Saint Paul, MN, United States of America

Thomas P Hartley