Abstract: Elongate medical devices with an expandable structure including elongated splines and a distal hub.

Abstract: An elongate medical device comprising an expandable structure with an expandable configuration and a collapsed configuration, a handle, operably coupled to the expandable structure, the handle further including a selective movement limiter; and a deflection control member coupled with the distal hub, where the deflection control member is configured to adjust a stiffness of the expandable structure, from a first stiffness to a second stiffness, and maintain the first stiffness or the second stiffness when the selective movement limiter couples with the deflection control member and limits a longitudinal movement of the deflection control member, and wherein the deflection control member is configured to move freely when the selective movement limiter is not coupled with the deflection control member.

Abstract: A partially-masked electrode includes a conductive material and an insulated coating having an outer surface. The insulated coating defines a contoured opening that exposes or reveals an area of the conductive material, wherein the contoured opening has an upper perimeter at the outer surface of the insulated coating. When the upper perimeter of the insulated surface coating is placed in contact with a tissue of interest, wherein the tissue of interest is proximate a blood pool, the insulated coating creates a seal between the blood pool and the contoured opening so that no blood in the blood pool can contact the conductive material. This seal reduces or eliminates the reception of far field effects in the blood pool by the electrode, making it easier to locate and diagnose unhealthy tissue.

Abstract: A partially-masked electrode includes a conductive material and an insulated coating having an outer surface. The insulated coating defines a contoured opening that exposes or reveals an area of the conductive material, wherein the contoured opening has an upper perimeter at the outer surface of the insulated coating. When the upper perimeter of the insulated surface coating is placed in contact with a tissue of interest, wherein the tissue of interest is proximate a blood pool, the insulated coating creates a seal between the blood pool and the contoured opening so that no blood in the blood pool can contact the conductive material. This seal reduces or eliminates the reception of far field effects in the blood pool by the electrode, making it easier to locate and diagnose unhealthy tissue.

Abstract: An electroanatomical mapping system can map electrical activation of tissue, and in particular create a slow conduction map, using a plurality of electrophysiology data points, each including local activation timing information, by computing a slow conduction metric for each point using the local activation timing information. The slow conduction metric can be used to classify points as no conduction points, slow conduction points, and normal conduction points, and the results can be graphically expressed, including as an animated representation of an activation wavefront propagating along a three-dimensional anatomical surface model.

Abstract: High-density mapping catheters with an array of mapping electrodes are disclosed. These catheters can be used for diagnosing and treating cardiac arrhythmias, for example. The catheters are adapted to contact tissue and comprise a flexible framework including the electrode array. The array of electrodes may be formed from a plurality of columns of longitudinally-aligned and rows of laterally-aligned electrodes.

Abstract: A medical device includes an elongate shaft extending along a shaft longitudinal axis and includes a shaft proximal portion and a shaft distal portion. The medical device can include an electrode disposed on the shaft distal portion. The medical device can include a first conductor lead and a second conductor lead, each of the conductor leads electrically being coupled to the electrode. A thermocouple junction formed via a thermocouple conductor can be electrically coupled to the electrode and the first conductor lead.

Abstract: An elongate medical device comprising an expandable structure with an expandable configuration and a collapsed configuration, a handle, operably coupled to the expandable structure, the handle further including a selective movement limiter; and a deflection control member coupled with the distal hub, where the deflection control member is configured to adjust a stiffness of the expandable structure, from a first stiffness to a second stiffness, and maintain the first stiffness or the second stiffness when the selective movement limiter couples with the deflection control member and limits a longitudinal movement of the deflection control member, and wherein the deflection control member is configured to move freely when the selective movement limiter is not coupled with the deflection control member.

Abstract: High-density mapping catheters with an array of mapping electrodes are disclosed. These catheters can be used for diagnosing and treating cardiac arrhythmias, for example. The catheters are adapted to contact tissue and comprise a flexible framework including the electrode array. The array of electrodes may be formed from a plurality of columns of longitudinally-aligned and rows of laterally-aligned electrodes.

Abstract: High-density mapping catheters with an array of mapping electrodes are disclosed. These catheters can be used for diagnosing and treating cardiac arrhythmias, for example. The catheters are adapted to contact tissue and comprise a flexible framework including the electrode array. The array of electrodes may be formed from a plurality of columns of longitudinally-aligned and rows of laterally-aligned electrodes.

Abstract: High-density mapping catheters with an array of mapping electrodes are disclosed. These catheters can be used for diagnosing and treating cardiac arrhythmias, for example. The catheters are adapted to contact tissue and comprise a flexible framework including the electrode array. The array of electrodes may be formed from a plurality of columns of longitudinally-aligned and rows of laterally-aligned electrodes.

Abstract: A kit for use in cryoablation procedures includes a cryoablation catheter having a cryoballoon positioned about its distal region. A pressure sensor is positioned distally of the cryoballoon. The catheter can be introduced into a patient's left atrium and the cryoballoon inflated. The cryoballoon can then be advanced into contact with a pulmonary vein wall in a manner that occludes the pulmonary vein. Occlusion can be verified by measuring a pressure within the pulmonary vein. Once occlusion is verified, the cryoballoon can be cooled to form a circumferential lesion about the pulmonary vein.

Abstract: High-density mapping catheters with an array of mapping electrodes are disclosed. These catheters can be used for diagnosing and treating cardiac arrhythmias, for example. The catheters are adapted to contact tissue and comprise a flexible framework including the electrode array. The array of electrodes may be formed from a plurality of columns of longitudinally-aligned and rows of laterally-aligned electrodes.

Abstract: A partially-masked electrode includes a conductive material and an insulated coating having an outer surface. The insulated coating defines a contoured opening that exposes or reveals an area of the conductive material, wherein the contoured opening has an upper perimeter at the outer surface of the insulated coating. When the upper perimeter of the insulated surface coating is placed in contact with a tissue of interest, wherein the tissue of interest is proximate a blood pool, the insulated coating creates a seal between the blood pool and the contoured opening so that no blood in the blood pool can contact the conductive material. This seal reduces or eliminates the reception of far field effects in the blood pool by the electrode, making it easier to locate and diagnose unhealthy tissue.