Biosense Webster (Israel) Patente

Electrical activity is sensed from a plurality of electrodes of a multi-electrode catheter. For each of a plurality of surface locations of cardiac tissue, a processor identifies first electrical signals originating at a first depth and second electrical signals originating at a second depth, estimates a first near-field signal originating at the first depth for each of the first electrical signals and detects scar borders at the first depth based on the first near-field signals, and estimates a second near-field signal originating at the second depth for each of the second electrical signals and detects scar borders at the second depth based on the second near-field signals. Based on the scar borders detected at the first and second depths, the processor visually displays first and second maps of the heart depicting scar tissue at the first and second depths, respectively.

Multiple signal mappings of cardiac tissue are created based on signals derived from different sets of electrodes in a multi-electrode catheter within a heart of a patient. A first set of electrodes is selected, each of which is within a first distance of a selected electrode, and a first spatial electrode signal analysis is performed on the electrical activity of the selected electrode based on signals from the first set of electrodes. A second set of electrodes is selected each of which is within a second distance of the selected electrode, and a second spatial electrode signal analysis is performed of the electrical activity of the selected electrode in accordance with signals from the second set of electrodes. This process is repeated for a plurality of further locations within the heart, and used to generate at least first and second electro-anatomical maps of the heart.

This disclosure relates to electro-anatomical mappings of cardiac tissue at different depths using a multi-electrode catheter. A multi-electrode catheter within a heart of a patient has a first plurality of electrodes on a first side and a second plurality of electrodes on a second side, wherein the first side is proximate to cardiac tissue at a first location and the second side is facing away from the cardiac tissue. Electrical activity is received from at least one electrode on the first side and the at least one electrode on the second side, and a signal analysis is performed thereon based at least in part on distances between electrodes on different sides of the multi-electrode catheter. The process is repeated for further locations of cardiac tissue in the heart, and an electro-anatomical map of the heart depicting electrical activity or scar tissue is generated based on the signal analysis.

Electro-anatomical mappings of cardiac tissue are created at different depths using a multi-electrode catheter that collects electrical activity from within a heart of a patient. A signal analysis of electrical activity at a first location is performed based on electrical activity received from a plurality of electrodes. A depth of electrical activity at the first location is determined in accordance with the signal analysis. This process is repeated for a plurality of further surface locations of cardiac tissue and at more than one depth. A plurality of electro-anatomical maps of the heart are generated, wherein the maps depict electrical activity at different depths of the cardiac tissue.

A guiding sheath assembly has an elongated shaft, and a control handle with a control knob and a shuttle configured for translation in response to manipulation of the control knob. The assembly includes a puller wire extending along the shaft and responsive to translation of the shuttle to deflect the shaft. The puller wire has a stop at its proximal end wherein a deflection sensor is affixed to stop subject to compression between to generate a signal in response to distortion between the first shuttle and the first stop. A catheter having a control handle and a control knob for manipulation of a deflection puller wire whose proximal end is affixed to a stop anchored in the control handle housing includes a strain gauge affixed to the stop configured to detect deformation resulting from actuation of the puller wire in deflecting the catheter shaft. A drip chamber.

A multi-electrode catheter with a first plurality of electrodes on a first side and a second plurality of electrodes on a second side is used to detect electrical activity within a heart of a patient. One of the first plurality of electrodes faces toward cardiac tissue at a first location and one of the second plurality of electrodes faces away from the cardiac tissue. A signal analysis is performed for the first location based on first signals received from the electrode facing toward cardiac tissue and second signals received from the electrode facing away from the cardiac tissue. The signal analysis includes application of a weighting to at least one of the first signals and the second signals. This process is repeated for a plurality of further locations of cardiac tissue in the heart and, based on the signal analysis, at least one electro-anatomical map of the heart is generated.

A catheter and method for the treatment of a patient having atrial flutter or other arrhythmia comprises an elongated catheter body having an outer wall, proximal and distal ends, and at least one lumen extending therethrough. Further it has a distal tip section comprising a flexible tubing having a proximal end and a distal end and a plurality of lumens extending therethrough. The proximal end of the tip section is fixedly attached to the distal end of the catheter body. The tip section further comprises a nitinol tube having slots formed therein which causes the distal tip section to deflect using the same puller-wire action used to cause the deflectable catheter to deflect at a point proximal to the distal tip section.

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An electrical connector assembly includes a female connector, which includes a female connector housing defining a cavity having an hourglass shape and a first array of electrically-conductive pins disposed within the cavity. The electrical connector assembly further includes a male connector that includes a male connector housing having an hourglass-shaped protrusion dimensioned to be inserted into and fit tightly within the cavity and a second array of electrically-conductive sockets, which are contained within the protrusion and are dimensioned and aligned so that upon insertion of the protrusion into the cavity, each of the pins is introduced into and makes electrical contact with a respective one of the sockets.

The disclosed technology includes a catheter comprising an elongated deflectable element extending along a longitudinal axis from a proximal end to a distal end, a position electrode attached to the elongated deflectable element proximate the distal end and configured for impedance-based position tracking, and a covering at least partially enclosing the position electrode. The covering can comprise a plurality of apertures such that a portion of a conductive surface of the position electrode is exposed through each aperture of the plurality of apertures.

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