31 results about "Icd lead" patented technology

A stimulation lead is configured to be implanted into a patient's body and includes at least one distal stimulation electrode and at least one conductive filer electrically coupled to the distal stimulation electrode. A jacket is provided for housing the conductive filer and providing a path distributed along at least a portion of the length of the lead for conducting induced RF energy from the filer to the patient's body.

A system and method for monitoring at least one chamber of a heart (e.g., a left ventricular chamber) during delivery of extrasystolic stimulation to determine if the desired extra-systole (i.e., ventricular mechanical capture following refractory period expiration) occurs. The system includes an implantable or external cardiac stimulation device in association with a set of leads such as epicardial, endocardial, and/or coronary sinus leads equipped with motion sensor(s). The device receives and processes acceleration sensor signals to determine a signal characteristic indicative of chamber capture resulting from one or more pacing stimulus delivered closely following expiration of the refractory period. A threshold optimization method optionally evaluates capture and at least one of: runs an iterative routine to establish or re-establish chamber capture for the PESP therapy, sets a logical flag relating to chamber capture status and stores parameter(s) relating to successful chamber capture for one or more subsequent cardiac cycles.

A pacing system includes a controller operable to provide control signals indicating desired pacing signals, a pulse generator connected to the controller and operable to receive the control signals and to generate the desired pacing signals based on the control signals, at least one lead electrically connected to the pulse generator and extending into a user's heart and operable to provide the pacing signals to the heart, at least one electrode positioned in the user's heart and electrically connected to the at least one lead, the at least one electrode in contact with the user's heart and operable to stimulate the heart based on the pacing signals; and a transceiver, in communication with the pulse generator and operable to selectively transmit the pacing signals to the electrode wirelessly. The transceiver is controlled by the controller to transmit the pacing signals when pacing signals are not received by the electrode from the at least one lead. The lead may include multiple leads held together in a sugar moiety as a unitary body for insertion into the heart. Once in the heart, the sugar moiety dissolves to allow the leads to separate for implantation at different points in the heart.

A method and apparatus for dynamically fixating and removing a lead in a vasculature of a body. At least one segmenting means such as a collar is disposed at a distal end of the lead forming a deployable actuable segment adapted to dynamically assume an engaging and retracted position. In an engaging position, the actuable segment dynamically and varyingly adapts into a shape or shapes to engage a vessel. In a retracted position the shape or shapes collapse thus maintaining the original geometry of the lead in the vasculature. The actuable segment assumes a deployed or retracted position based on the flexural condition of the segment, respectively.

In a method and an arrangement for evaluating operational effectiveness of an implantable medical device for different lead placements associated with the medical device, a measuring unit records signals that are characteristic of cardiac activity at respectively different lead positions, and these signals are stored. A processor accesses the stored signals and, from the stored signals, determines a measure of cardiac activity at each of the lead positions. The recorded signals may be intracardiac ECG signals, surface ECG signals, heart sound signals obtained from a microphone, or impedance signals. The lead position at which the best hemodynamic behavior of the heart is identified from the analysis of the stored signals, and is determined as being the optimum site for placement of the electrode leads.

A method and system for the diagnosis of anomalies in a lead attached to an implantable medical device, such as an implantable cardioverter defibrillator (ICD), including an insulation breach resulting in a short circuit of the high-voltage shock pulse. Determination that the defibrillation pathway is shorted may be made by initial analysis of a Reference EGM and Diagnostic EGM and subsequent analysis of Differential Diagnostic EGMs. Upon determining if a specific defibrillation pathway is shorted, the nonessential defibrillation electrode of that pathway may be excluded from the defibrillation circuit, delivering defibrillation current only between functioning defibrillation electrodes. Alternatively, the ICD system can confirm the presence of a lead anomaly with one or more alternative diagnostic approaches. Patient and remote-monitoring alerts may be initiated.

Implantable lead having an electrode body with a free end and an inner part axially movable or rotatably movable with respect to it and an end on which means of fixation are extendable out of the free end by axially displacing the inner part, the inner periphery of the electrode body having an elastically deformable, peripheral, ring or ring segment-shaped, sealing/resistance element fixed to it. The outer periphery of the inner part having a section whose diameter changes (decreases) in the axial direction; this section passes the sealing/resistance element when the inner part is axially displaced. The inner periphery of the electrode body having a section whose diameter changes (decreases) in the axial direction; this section placed so that the sealing/resistance element passes this section when the inner part is axially displaced, the sealing/resistance element increasingly deformed during axial displacement of the inner part and counteracting movement thereof.

One embodiment of the present invention provides an implantable cardioverter-defibrillator for subcutaneous positioning between the third rib and the twelfth rib within a patient, the implantable cardioverter-defibrillator including a housing including a first electrode; a telescoping lead assembly including a second electrode, wherein the telescoping lead assembly is electrically and mechanically coupled to the housing; and an electrical circuit located within and electrically coupled to the housing.

A collector electrode assembly which can be implanted by laparoscopy through the abdominal wall into the small pelvis of the human body includes a collector electrode for neurostimulation of nerves; a connection cable having an outer surface, said collector electrode being arranged at one end of said connection cable and comprising several outer segment electrodes which can be contacted individually and/or in groups and which are arranged axially one after another in the direction of the longitudinal extent of the collector electrode, wherein an insulating section is arranged axially between in each case two adjacent outer segment electrodes and permits electrical insulation of respective two adjacent outer segment electrodes; radially expandable fixing structures positioned on the collector electrode and radially expandable from a withdrawn position to a radially expanded position for fixing the collector electrode in place at said nerves; a visually perceptible direction marker on the outer surface of the connection cable, at least in a cable section which is spaced apart from axial ends of the connection cable and has an axial extent of at least 10 cm and/or at least 15% of total length of the connection cable, said direction marker indicating orientation of the connection cable to an operator using the assembly, and wherein the direction marker is designed and arranged in such a way that the identification of the orientation of the connection cable is possible at any desired axial section of the cable section having a maximum axial extent of 2 cm.

An implantable medical device (IMD) provides quadripolar transthoracic impedance measurement capability by forming at least one of the two electrodes associated with the canister of the device on a lead proximate the canister.

A subcutaneous implantable device is provided that includes a defibrillation electrode disposed along a portion of a lead, and a lead tip connected to the lead. The lead tip includes a trailing end coupled to a distal end of the lead, and first and second non-parallel sides extending from the trailing end that converge to a leading end that is configured to wedge between tissue layers as the lead is advanced subcutaneously.