Abstract:
A percutaneously implantable chamber for the treatment of a cardiac condition is disclosed herein, the chamber capable of delivery and maintenance of viable cells comprising a pacemaker gene or other genes intended to impart a specific function via a host cell An artificial sinoatrial node and artificial atrial ventricular node for the restoration of the pacemaker function of the heart of a subject comprises a chamber comprising cells expressing a pacemaker gene. Further, a chamber may be used for the implantation and maintenance of viable, responsive, immunoisolated cells to induce or enhance muscle contraction of a subject for the treatment of a disorder.
Abstract:
An apparatus includes a flexible lead body, an electrode coupled to the lead body, and an implantable pulse generator electrically coupled to the electrode. The implantable pulse generator is adapted to deliver a baroreflex stimulation signal to a baroreceptor in the pulmonary artery via the electrode. The apparatus includes means for passively fixating the electrode within the pulmonary artery.
Abstract:
An improved suture sleeve for a lead body includes an elongated tubular sleeve body formed of a compressible elastomeric material wherein a surface of the lumen has a relatively rough texture formed by a particulate or fibrous media embedded therein.
Abstract:
An anchoring device and a delivery method thereof can effectively provide a means for securing an implant to a wall of an internal organ within a patient in a variety of clinical applications. In one embodiment, an anchoring device used to retain a cardiac pressure measurement device is provided. The device is implanted in the body by deforming it to a small cross section profile, sliding it through a low profile delivery device and ejecting from the delivery device at a targeted site. The anchoring mechanism, when ejected from the delivery device, reverts back to pre-formed configuration and engages opposite sides of an organ wall, thereby anchoring the implant in the organ wall.
Abstract:
Medical device and therapeutic methods for use in the field of cardiology, cardiac rhythm management and interventional cardiology, and more specifically to catheter-based systems for implantation of pacing leads and electrodes, or intramural myocardial reinforcement devices, within the myocardial wall of the heart, such as the ventricles, to provide improved cardiac funtion.
Abstract:
A lead (100) for monitoring or simulating cardiac activity is provided. The lead (100) is adapted for implantation on or about the heart within the coronary vasculature and for connection to a signal generator (140). The lead is constructed and arranged so that when it is implanted, the electrodes (122) are housed in the coronary vasculature and urged into intimate contact a vessel wall (128). The lead optionally includes a tapered, flexible lead body portion that is distal to a biased portion.
Abstract:
A lead (100) for monitoring or simulating cardiac activity is provided. The lead (100) is adapted for implantation on or about the heart within the coronary vasculature and for connection to a signal generator (140). The lead is constructed and arranged so that when it is implanted, the electrodes (122) are housed in the coronary vasculature and urged into intimate contact a vessel wall (128). The lead optionally includes a tapered, flexible lead body portion that is distal to a biased portion.
Abstract:
A lead (100) having a distal end electrode assembly (130) adapted for implantation on or about the heart or within a vein and for connection to a system for monitoring or stimulating cardiac activity. The electrode assembly includes conductive fixation features, such as conductive tines (320) or flexible members, in combination with non-conductive fixation features (340). The conductive fixation features also include tines coated with a conductive material. The fixation features further include conductive tines which are retractable. A defibrillation coil is optionally disposed at the distal end of the lead in combination with the conductive tines.
Abstract:
An intravenous lead for use with a cardiac device for implantation in the coronary venous system of the heart includes a lead body (10) that is adapted to be routed through the vascular system into the coronary sinus with the distal end portion of the lead placed in the great cardiac vein (12) or branch vein. The lead body (10) includes a preformed section disposed just proximal of its tip so that the lead body exhibits a two-dimensional wave having peaks (22), and valleys (24) for contacting the endothelial layer of the vein (12) at discrete, longitudinally spaced points to stabilize the electrode (20) against displacement.
Abstract:
A lead assembly (10) adapted for endocardial fixation to a human heart is provided. The lead assembly includes a lead body (12) that has a proximal end provided with a connector (16) for electrical connection to a cardiac stimulator (18). The cardiac stimulator may be a pacemaker, a cardioverter/defibrillator, or a sensing instrument. The distal end of the lead body is connected to a tubular electrode housing (22). The lead body (12) consists of a noncoiled conductor cable (24) surrounded by a coextensive insulating sleeve (26). In contrast to conventional leads, the lead body of the present invention does not require coiled conductor wires or an internal lumen. Manipulation of the lead body is via an external guide tube. Lead body diameters of 0.25 mm or smaller are possible.