A medical probe includes a generally tubular member with a tip portion coupled to the tubular member. A puller wire is disposed in the tubular member and configured for movement along the longitudinal axis to bend the tip portion with respect to the longitudinal axis. An anchor is disposed within the tubular member and connected to the puller wire such that the anchor has a t-bar. The t-bar includes a generally transverse extension and a ferrule connected to the puller wire. The t-bar has a polymeric member disposed on the generally transverse extension to increase a strength of the anchor with respect to forces applied to the puller wire to deflect the tip of the medical probe.

Systems and methods for electroporation catheters are disclosed herein. An electroporation catheter includes a shaft, and a plurality of splines forming a basket around a distal portion of the shaft, each spline extending between a proximal end that is coupled to the shaft and a distal end that is coupled to the shaft, wherein each spline of the plurality of splines comprises at least one energizable electrode. The electroporation catheter further includes a balloon positioned within the basket formed by the plurality of splines, the balloon selectively inflatable to facilitate securing a position of the plurality of splines.

Various aspects of the present disclosure are directed towards apparatuses, systems and methods that may include an electroporation ablation device. The electroporation ablation device may include a shaft defining a longitudinal axis and an electrode assembly including a first pair of electrodes having a first electrode and a second electrode, and a second pair of electrodes disposed adjacent to the first pair of electrodes and having a third and a fourth electrode. In some embodiments, the first electrode has a first edge portion, and a first side view of the first edge portion along the longitudinal axis is rounded at a first corner.

A system includes, first and second circuitries and one or more devices. The first circuitry is configured to generate a stress signal for reducing an impedance of tissue of an organ. The second circuitry is configured to generate an irreversible electroporation (IRE) signal for producing a lesion in the tissue. The one or more devices are configured to apply to the tissue, the stress signal at a first time interval, and the IRE signal at a second time interval, subsequent to the first time interval.

A catheter includes a shaft, a distal-end assembly, and a plurality of electrodes mounted on the distal-end assembly. The shaft is configured for insertion into an organ of a patient. The distal-end assembly is coupled to a distal end of the shaft and configured to make contact with tissue in the organ. At least an electrode among the electrodes is (i) electrically exposed on at least a portion of a surface of the electrode that makes contact with the tissue and (ii) electrically insulated on at least a portion of the surface of the electrode that faces away from the tissue.

Various aspects of the present disclosure are directed towards apparatuses, systems, and methods for electroporation ablation. The electroporation ablation catheter may include an electrode assembly comprising one or more electrodes configured to generate electric fields in target tissue in response to a plurality of electrical pulse sequences delivered in a plurality of therapy sections, and an ultrasound transducer configured to generate a first set of ultrasound signals during a first electrical pulse sequence of the plurality of electrical pulse sequences and generate a second set of ultrasound signals after an end of the first electrical pulse sequence and before a beginning of a second electrical pulse sequence, the second electrical pulse sequence being an electrical pulse sequence subsequent to the first electrical pulse sequence.

In one embodiment, a medical system includes a catheter configured to be inserted into a body part of a living subject, a display configured to provide a view of at least part of a hand of a user, and a processor configured to track a position of the catheter in the body part, render to the display a three-dimensional view of an interior of an anatomical map of the body part and a representation of the catheter inside the anatomical map responsively to the tracked position, while the display is providing the view of the at least part of the hand of the user, recognize a gesture of the at least part of the hand of the user selecting a portion of the catheter, and perform an action responsively to recognizing selection by the user of the portion of the catheter.

The present disclosure relates to a method and a device for treating heart failure by normalizing elevated blood pressure in the left and right atria of a heart of a mammal. The present disclosure includes methods for creating and maintaining an opening in the atrial septum. Tools for making an opening and enlarging the opening are also disclosed. Use of the techniques and tools described herein prolongs the patency of an intra-atrial pressure relief opening.

A catheter device for renal denervation ablation includes a flexible catheter shaft having an electrically insulating expandable member in its distal portion with at least one electrode located proximal to the member, at least one electrode located distal to the member, and with openings in the distal shaft with at least one opening proximal to the proximal electrode and one opening distal to the distal electrode of said electrode pair, said openings connected through an inner lumen in the catheter that provides a path for blood to flow through the expandable member. In one embodiment, the device comprises a flexible catheter shaft with a multiplicity of recessed paired electrodes disposed in recessed spaces in its distal portion, such that an electrically conducting portion of each electrode is exposed to the exterior of the catheter within a recessed space, and with an electrical insulator separating the electrodes of each pair.

Medical devices and methods for making and using medical devices are disclosed. An example electrophysiology medical device may include a catheter shaft including a distal end portion and a sensing assembly having three or more terminals. The sensing assembly includes one or more current-carrying electrodes and one or more sensing electrodes. The one or more current-carrying electrodes, the one or more sensing electrodes, or both includes a mini-electrode. The mini-electrode is disposed on one of the other electrodes. The medical device may also include a controller coupled to the sensing assembly.