System and method for targeting catheter electrodes

Abstract

A system and method is described for a catheter guidance system which allows an operator to use a mapping catheter to specify tissue target locations for the automatic guidance of a second therapeutic catheter. The operator places a mapping catheter at a desired location, and commands the catheter guidance system by either selecting a point on that catheter or one of the catheter electrode electrocardiograms. The operator may target the selected dynamic location, or tissue contact beyond that location on a specific side of the mapping catheter.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The invention relates to the systems and methods for guiding, steering and advancing an invasive medical device in a patient.[0003]2. Description of the Related Art[0004]In cardiac electrophysiological procedures, mapping catheters are used to define the geometry of a coronary chamber and map its surface electrocardiogram. Mapping catheters contain an array of electrodes which are used for position location and sensing the surface electrical activity. For sensing electrical activity, these electrodes are either used individually or in differential pairs, depending upon the type of sensory hardware available. When the surface has been fully mapped, a mapping catheter is often used in conjunction with an ablation catheter to locate and deliver therapeutic treatment at specific locations. The mapping catheter is returned to the area of interest, and the electrogram at each electrode or electrode pair is observed on the data recorder to det...

AI Technical Summary

Benefits of technology

[0006]The catheter guidance system then uses this live moving location to guide the therapeutic ablation catheter to this location or to tissue contact (e.g., where the tip of the catheter maintains relatively continuous contact with the surface of the heart chamber wall throughout the heartbeat cycle) near this location. This is done to increase the accuracy of targeting tissue contact at the location which is not possible with the targeting of a static geometric map. In one embodiment, the moving location corresponds to a Cartesian point on a geometric map which represents the average position of the tissue location that passes through that point.

Problems solved by technology

Unfortunately, mapping of the heart chamber using prior art systems is a time-consuming process that increases the cost and risk of ablation procedures.

The mapping process is complicated by the fact that the walls of a beating heart, not stationary, and the surgeon using traditional mapping catheters, does not have adequate control of the distal end of the catheter.

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