15 results about "Pacemaker system" patented technology

Dual chamber leadless pacemaker systems comprising an aLP and a vLP, and methods for use therewith, are disclosed. Such systems and methods can detect and terminate pacemaker mediated tachycardia (PMT) even when the implant-to-implant (i2i) communication from the vLP to aLP (V2A) is compromised. The vLP monitors for PMT in response to reception of an i2i communication from the aLP indicating compromised V2A i2i communication and initiates, following detection of a PMT, initiate a PMT PV interval in response to reception of an i2i communication from the aLP indicating an atrial sensed event. The PMT PV interval is shorter than a PV interval that the vLP would otherwise use for ventricular pacing if PMT was not detected. The vLP also delivers a ventricular pacing pulse to the ventricular cardiac chamber in response to the PMT PV interval expiring without an intrinsic ventricular event being detected during the PMT PV interval.

A retrieval docking component includes a base and a limiting part. A distal end of the base along an axial direction is configured for connection with a body of an implantable medical device, and a proximal end of the base along an axial direction is connected to the limiting part. A radial outer dimension of the limiting part is greater than a radial outer dimension of the proximal end of the base. The limiting part includes at least two accommodation grooves along its circumference, which are open outwardly in radial direction of the limiting part and configured for capture a snare of a delivery device. The structure of the retrieval docking component provides adequate and reasonable accommodation space to the retrieval snare in a limited space, enabling the delivery device conveniently and reliably form a connection with the retrieval docking component, increasing success rate of retrieval and docking.

A detachable leadless pacemaker system for cardiac conduction bundle pacing is disclosed. The system includes a detachable leadless pacemaker and a passive leadless pacemaker. A hook-shape side electrode is inserted into a ventricular septum for cardiac conduction bundle pacing. The detachable leadless pacemaker may be arranged in a ventricle, and the passive leadless pacemaker may be arranged in an atrium, so as to realize dual-chamber pacing both in the ventricle and in the atrium. The detachable leadless pacemaker is coupled with the passive leadless pacemaker by an anti-tension reinforced wire, which is used for pulling back the detachable leadless pacemaker to a new position.

Leadless pacemakers (LPs) and methods and systems for use therewith are disclosed. During a first period of time, during which an LP receives event messages from a second LP, the LP times its pacing of a first cardiac chamber based on the event messages received from the second LP so that AV synchrony is maintained, and the LP determines and stores count value(s). Based on at least one of the count value(s), the LP determines a compensation offset indicative of a drift between timing circuitry of the LP and timing circuitry of the second LP. During a second period of time, during which the LP does not receive event messages from the second LP, the LP times its pacing of the first cardiac chamber based on the compensation offset to thereby compensate for the drift so that the AV synchrony is also maintained during the second period of time.

The application discloses a three-dimensional implantable MIMO antenna for biological telemetry, which is suitable for capsule endoscopy and leadless pacemaker. The system is composed of four antenna units, each unit including a radiation patch, a ground plane, a feed port and a short circuit structure. The symmetric topology of the radiation patch and the strategic layout of the feed / short circuit needles realize self-decoupling, which can effectively reduce the mutual coupling without external decoupling elements. The antenna can work stably at 1.3975 GHz and 2.45 GHz frequency bands, and keep good reflection coefficient, gain and radiation pattern under different tissue environments and implantation depth changes. SAR evaluation shows that it meets the IEEE C95.1-2019 standard, ensuring safety. The three-dimensional structure provides multi-directional radiation diversity, realizing isotropic coverage and robust communication. High-speed telemetry experiments show that it can support up to 100 Mbps data transmission within 10-15 m, which is suitable for complex environments such as continuous motion, attitude change and deep implantation, realizing robust communication and efficient energy transmission.

A dual-chamber leadless pacemaker (LP) system includes a first leadless pacemaker (LP1) and a second leadless pacemaker (LP2), wherein LP1 is configured to be implanted in or on a first heart chamber and deliver pacing pulses to the first heart chamber, and LP2 is configured to be implanted in or on a second heart chamber and deliver pacing pulses to the second heart chamber. Information is obtained regarding the amplitude of the pacing pulses delivered by LP2 to the second heart chamber and / or the sensitivity of a sensing circuit of LP1, which is configured to be used by LP1 to detect the inherent depolarization of the first heart chamber. A crosstalk protection duration is determined based on at least some of this information, such that it is performed for an appropriate duration when crosstalk protection is executed.

The application discloses a detachable leadless pacemaker system which can pace cardiac conduction bundle. The specific embodiment of the system comprises: a detachable leadless pacemaker, the detachable leadless pacemaker is provided with a first data interface; a passive leadless pacemaker, the passive leadless pacemaker is provided with a second data interface; a signal line, which is connected with the first data interface and the second data interface respectively, so as to realize power supply of the detachable leadless pacemaker for the passive leadless pacemaker and data communication between the two. The detachable leadless pacemaker can be arranged in a ventricle to realize atrioventricular dual chamber pacing with the passive leadless pacemaker arranged in an atrium. An unpackaged circuit can be arranged in the passive leadless pacemaker, which is used as an electrode carrier for sensing atrial electrical signals and implementing electrical stimulation. The detachable leadless pacemaker and the passive leadless pacemaker are connected by a tensile-resistant reinforcing line, which is used for recovery operation when the detachable leadless pacemaker is repositioned.

A pacemaker system includes a drive-sense circuit (DSC) operably coupled to a pacemaker lead. The DSC generates a pace signal including electrical impulses based on a reference signal. The DSC provides the pace signal via the pacemaker lead to an electrically responsive portion of a cardiac conductive system of a subject to facilitate cardiac operation of a cardiovascular system of the subject. The DSC senses, via the pacemaker lead, cardiac electrical activity of the cardiovascular system of the subject that is generated in response to the pace signal and electrically coupled into the pacemaker lead and generates a digital signal that is representative of the cardiac electrical activity of the cardiovascular system of the subject that is sensed via the pacemaker lead. The DSC provides digital information to one or more processing modules that includes and / or is coupled to memory and that provide the reference signal to the DSC.

A dual chamber leadless pacemaker (LP) system includes a first leadless pacemaker (LP1) and a second leadless pacemaker (LP2), wherein the LP1 is configured to be implanted in or on a first cardiac chamber and to deliver pacing pulses to the first cardiac chamber, and the LP2 is configured to be implanted in or on a second cardiac chamber and to deliver pacing pulses to the second cardiac chamber. Information is obtained about a magnitude of the pacing pulses that the LP2 is configured to deliver to the second cardiac chamber and / or a sensitivity of a sense circuit of the LP1 that is configured to be used by the LP1 to detect intrinsic depolarizations of the first cardiac chamber. A crosstalk protection duration is determined based on at least some of the information so that when crosstalk protection is perform, it is performed for an appropriate duration.

The present invention relates to a system and method for replacing an implanted medical device with an implantable medical replacement device, wherein a programming device sends a command signal to the medical device to change an address of the medical device to a new address being different from an address of the replacement device to allow independent communication of the programming device with both the medical device and the replacement device.

The present invention provides a leadless pacemaker, an electrode delivery assembly, and a leadless pacemaker system. The leadless pacemaker comprises a pacemaker body, a signal line, and a distal electrode; the distal electrode is connected to the pacemaker body by means of the signal line; the distal electrode comprises a mating structure, the mating structure being used for detachably connecting to a docking structure of the electrode delivery assembly; and when the mating structure is connected to the docking structure, the distal electrode is configured to be implanted at a target site, delivered by the electrode delivery assembly. When the mating structure is connected to the docking structure, the distal electrode can be implanted at the target site, delivered by the electrode delivery assembly. After the distal electrode is implanted, the electrode delivery assembly can be removed by means of separating the docking structure from the mating structure. After implantation, when subjected to myocardial contraction, stress can be relieved by means of a signal line, thereby reducing or preventing fatigue fracturing, and improving safety and reliability for long-term use.

Leadless pacemakers (LPs) and methods and systems for use therewith are disclosed that are specifically for use with a multi (e.g., dual) chamber LP system that performs AAI+VVI operation. More specifically, an atrial LP (aLP) and a ventricular LP (vLP) collectively provide the AAI+VVI operation. Additionally, at least one of the aLP or the vLP determines a compensation offset and uses the compensation offset to compensate for drift between timing circuitry of the atrial LP and timing circuitry of the vLP while the aLP and the vLP are providing for AAI+VVI operation, so that synchronization between atrial and ventricular pacing is maintained whenever the vLP delivers ventricular pacing during two or more consecutive cardiac cycles during the AAI+VVI operation.

The invention provides a lead-free pacemaker, an electrode conveying assembly and a lead-free pacemaker system. The lead-free pacemaker comprises a pacemaker body, a signal line and a far-end electrode, the far-end electrode is connected with the pacemaker body through the signal line; the far-end electrode comprises a matching structure, and the matching structure is used for being detachably connected with a butt joint structure of an electrode conveying assembly. When the matching structure is connected with the butt joint structure, the far-end electrode is configured to be implanted into a target part under conveying of the electrode conveying assembly. And when the matching structure is connected with the butt joint structure, the far-end electrode can be implanted into a target part under the conveying of the electrode conveying assembly. After implantation of the far-end electrode is completed, the electrode conveying assembly can be removed through separation of the butt joint structure and the matching structure. After implantation, stress can be eliminated through the signal line when myocardial contraction and extrusion are carried out, fatigue fracture is reduced or avoided, and safety and reliability of long-term use are improved.

A device includes a signal generator module, a processing module, and a housing. The signal generator module is configured to deliver pacing pulses to an atrium. The processing module is configured to detect a ventricular activation event and determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event. The processing module is further configured to schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval and control the signal generator module to deliver the pacing pulse at the scheduled time. The housing is configured for implantation within the atrium. The housing encloses the stimulation generator and the processing module.