St Jude Medical, Atrial Fibrillation Division, Inc

Robert D Aiken

D Curtis Deno

Anthony David Hill

Stephan Paul Miller

Martin Maitre Grasse

Hua Zhong

Mark Kudas

Glen H Kastner

Daniel A Feeney

Martin M Grasse

A method of refining an anatomical model includes acquiring a two-dimensional echocardiogram that has a variable intensity, relating the two-dimensional echocardiogram to a plurality of mapping points that exist in three-dimensional space, and determining a confidence value for each of two or more mapping points that corresponds to an intensity at a point on the two-dimensional echocardiogram.

Refinement of an anatomical model using ultrasound

A method and system for assessing proximity between an electrode and tissue is provided. The system includes an electronic control unit (ECU). The ECU is configured to acquire values for first and second components of a complex impedance between the electrode and the tissue, and to calculate an electrical coupling index (ECI) responsive to the first and second values. The ECU is further configured to process the ECI to determine the proximity of the electrode to the tissue. The ECU may be configured to calculate an electrical coupling index rate (ECIR) based on the calculated ECI and information relating to the change in location of the electrode, and to assess proximity based on the ECIR. Alternatively, the ECU may be configured to assess the proximity using the calculated ECI, as opposed to the ECIR.

System and method for assessing the proximity of an electrode to tissue in a body

A method of displaying the influence of an aspect of a model includes acquiring a two-dimensional echocardiogram having a variable intensity; relating the two-dimensional echocardiogram to a plurality of mapping points, the mapping points existing in a three-dimensional model space; determining a degree of influence value for a mapping point; and displaying the mapping point with a visual attribute that corresponds to the determined degree of influence value.

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Stillwater, MN, United States of America

Robert D Aiken