Devices, systems, and methods for releasing a catheter from an implant may include a catheter comprising first and second elongate elements, first and second elongate element lumens, a tissue anchor lumen, apertures corresponding to each of the lumens, and retaining portions between adjacent apertures. The first elongate element may extend out of its lumen through the first elongate element aperture, across the retaining portion transversely with respect to a longitudinal axis, and towards the second elongate element aperture. The first elongate element may then extend into the second elongate element aperture, loop over the second elongate element, and extend back across the retaining portion and into the first elongate element lumen. In some instances, the second elongate element is retracted to uncouple the first and second elongate elements from each other and to open a channel for the release of tethered tissue anchors.

An electrophysiology catheter constructed with assembly and wiring of ring electrodes using spacer rings of electrically-nonconductive material, whose length is predetermined/premeasured, includes a distal section with at least one spine having two electrodes, and a spacer member therebetween, wherein the spacer member configured to provide a separation gap between the two electrodes. The separation gap may span in an axial direction and/or in a circumferential direction. The spacer member may be configured generally as a ring with a center axial opening configured to receive the spine therethrough. The spacer member may include an axial extension providing a first separation gap between a first pair of electrodes in a circumferential direction, and a circumferential providing a second separation gap between a second pair of electrodes in an axial direction.

A tissue-removing catheter for removing tissue in a body lumen includes an elongate body and a handle mounted to a proximal end portion of the elongate body. The handle is operable to cause rotation of the elongate body. A tissue-removing element is mounted on a distal end portion of the elongate body. The tissue-removing element is configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen. An inner liner is received within the elongate body and is coupled to the handle at a proximal end portion of the inner liner. The inner liner defines a guidewire lumen. The inner liner is coupled to the tissue-removing element at a distal end portion of the inner liner such that translational movement of the inner liner in the body lumen causes a corresponding translational movement of the tissue-removing element.

A guide sheath device with an integrated stabilization wire is provided. The guide sheath device includes an elongate member having a proximal and distal end and a lumen there between and a stabilization wire integrated to the elongate member. The guide sheath is configured to access the lower vasculature via a contralateral percutaneous access. The stabilization wire is configured to exit the vasculature at an ipsilateral percutaneous access and be locked in place at the exit. The proximal end of the guide sheath and the distal end of the stabilization wire being accessible outside the vasculature enable stabilization of the stabilization wire and the guide sheath. The stabilization enables stabilization of procedural catheters and instruments as they access the site of a procedure within the lower vasculature.

An everting balloon system is disclosed that can be used for biopsy within a body of a patient or animal. The everting balloon system can be used to access a bodily cavity or vessel for tissue specimen collection at specific bodily locations. The everting catheter system described simplifies the process of tissue biopsy.

Devices and methods for assisting cardiac function. In an exemplary embodiment of a device for assisting heart function of the present disclosure, the device includes a first plate and an opposing second plate, each plate having an inner surface, a cardiac processor coupled to at least one of the first plate and the second plate, a bladder having an inner chamber and disposed between the inner surfaces, and a first catheter having a proximal end in communication with the inner chamber of the bladder and a distal end having a first pericardial balloon coupled thereto, wherein a gas and/or a liquid within the inner chamber of the bladder can be injected into the first pericardial balloon upon compression of the first plate relative to the second plate, and wherein the gas and/or the liquid can be removed from the first pericardial balloon upon retraction of the first plate relative to the second plate.

A medical device for treating a vein, including component parts thereof, wherein the device comprises a vein stretching member; a vein stretching member for use with the device; a kit of parts including the device and one or more vein stretching member and a method for treating a vein including use of the device.

Disclosed herein is a catheter for delivering an implantable medical lead to an implantation site near an ostium leading to a proximal region of a coronary sinus. The catheter includes a distal end, a proximal end opposite the distal end, a tubular body extending between the distal and proximal ends, an atraumatic fixation structure defining a distal termination of the distal end, and a lead receiving lumen. The atraumatic fixation structure is configured to enter the ostium and passively pivotally anchor with the proximal region of the coronary sinus. The lead receiving lumen extends along the tubular body from the proximal end to an opening defined in a side of the tubular body near the distal end and proximal the atraumatic fixation structure.

Dual-access site catheter systems with a blade or scoring functionality entering through a first access site and a balloon functionality for manipulating or driving the blade or scoring functionality through a different site. The blade or scoring functionality also sometimes provides needle or fluid delivery functionality to an atherosclerotic lesion.

A bifurcated catheter and methods of use are disclosed herein. The bifurcated catheter can include a fixed flat wire that is configurable as a stabilization wire. The bifurcated catheter can be configured to improve the initial access and directability by application of a pull force to the stabilization wire, in addition to a push force from the proximal end of the bifurcated catheter. The stabilization wire is anchored once the bifurcated catheter is positioned. The anchored, bifurcated catheter provides stability and pushability to assist the procedural catheter in traversing the tortuous peripheral vasculature.