An implantable medical electrical lead connectable to an electrical header of an implantable medical device includes a lead body extending from a proximal end to a distal end, a lead terminal disposed at the proximal end of the lead body and configured to couple the lead to the electrical header, and a lead boot disposed at the lead terminal. The lead boot includes a strain relief portion and a seal portion. The strain relief portion is formed of a first elastic polymer and the seal portion is formed of a second elastic polymer. The first elastic polymer is different from the second elastic polymer.

An extra-cardiovascular implantable cardioverter defibrillator (ICD) having a low voltage therapy module and a high voltage therapy module is configured to select, by a control module of the ICD, a pacing output configuration from at least a low-voltage pacing output configuration of the low voltage therapy module and a high-voltage pacing output configuration of the high voltage therapy module. The high voltage therapy module includes a high voltage capacitor having a first capacitance and the low voltage therapy module includes a plurality of low voltage capacitors each having up to a second capacitance that is less than the first capacitance. The ICD control module controls a respective one of the low voltage therapy module or the high voltage therapy module to deliver extra-cardiovascular pacing pulses in the selected pacing output configuration via extra-cardiovascular electrodes coupled to the ICD.

This disclosure is directed to a curvilinear medical electrical lead. For example, a medical electrical lead includes a lead body, a high voltage electrode positioned on the lead body, the high voltage electrode comprising a proximal coated portion, a distal coated portion, and an uncoated portion. Additionally, the medical electrical lead includes a first low voltage electrode and a second low voltage electrode distal to the first low voltage electrode, wherein a first line passes through the first low voltage electrode and the second low voltage electrode, wherein a second line passes through the first low voltage electrode and the uncoated portion, the second line forming a first angle with the first line, and wherein a third line passes through the second low voltage electrode and the uncoated portion, the third line forming a second angle with the first line.

Modular cardiac rhythm management system and method, including:

a first implantable stimulation device (ISD), and
a second ISD,
wherein the first ISD comprises a first detection unit detecting a patient's cardiac rhythm and a first processor analyzing the detected patient's cardiac rhythm and delivering a first antitachycardia pacing therapy (APT),
wherein the second ISD comprises a second detection unit detecting the patient's cardiac rhythm and a second processor analyzing the detected patient's cardiac rhythm and delivering shock therapy or a second APT, and
wherein the first processor allows delivery of APT only if analysis of the patient's cardiac rhythm within preceding time period A reveals tachycardia criterion A′ and absence of shock therapy, and/or
wherein the second processor allows delivery of shock therapy or second APT only if analysis of the patient's cardiac rhythm within preceding time period B reveals tachycardia criterion B′ and absence of first APT.

A subcutaneous lead for an implantable cardiac device, in particular for a defibrillator or/and a pacemaker comprising a lead body, itself comprising at least one sensing electrode and an insulating sleeve into which the lead body is threaded so that the insulating sleeve and the lead body are movable relative to each other so as to at least partially cover the at least one sensing electrode with the insulating sleeve.

Systems and methods involve an intrathoracic cardiac stimulation device operable to provide autonomous cardiac sensing and energy delivery. The cardiac stimulation device includes a housing configured for intrathoracic placement relative to a patient's heart. A fixation arrangement of the housing is configured to affix the housing at an implant location within cardiac tissue or cardiac vasculature. An electrode arrangement supported by the housing is configured to sense cardiac activity and deliver stimulation energy to the cardiac tissue or cardiac vasculature. Energy delivery circuitry in the housing is coupled to the electrode arrangement. Detection circuitry is provided in the housing and coupled to the electrode arrangement. Communications circuitry may optionally be supported by the housing. A controller in the housing coordinates delivery of energy to the cardiac tissue or cardiac vasculature in accordance with an energy delivery protocol appropriate for the implant location.

Percutaneous transvenous defibrillator and/or pacing devices with integrated cardiac assist devices and method of use. In some embodiments, a device may comprise a shared catheter, a defibrillator assembly, an automated external defibrillator (AED) and a cardiac assist assembly, wherein the defibrillator assembly includes at least two defibrillation coils in communication with the AED and wherein the defibrillator assembly and the cardiac assist assembly use the shared catheter for percutaneous and intravenous implantation into a patient. In some embodiments, a device may comprise a shared catheter, a pacing assembly, a pacing controller and a cardiac assist assembly, wherein the pacing assembly includes at least two electrodes in communication with the pacing controller, and wherein the pacer assembly and the cardiac assist assembly use the shared catheter for percutaneous and intravenous implantation into a patient.

A cardiac defibrillation system. The system comprising a housing and an implantable lead. The implantable lead comprising two ends, including a first end connected to the housing and a second end being a free end. The implantable lead also comprising a defibrillation electrode and at least three detection electrodes including a first detection electrode, a second detection electrode, and a third detection electrode. The first detection electrode and the second detection electrode forming a first dipole. The third detection electrode and the first detection electrode, or, the third detection electrode and the second detection electrode, or, the housing and one of said detection electrodes, forming a second dipole, where a length of the first dipole is between 5 and 50 millimeters and a length of the second dipole is between 50 and 400 millimeters.

Method for recovering and stabilizing normal heart rate of patients suffering in or being inclined to having atrial fibrillation, comprising the step of sensing primary electrical pulses generated in the right atrium (1), of generating artificial electrical stimulation pulses coordinated with the sensed pulses and stimulating therewith the portion of the left atrium (9) which is remote from the right atrium (1), whereby increasing the areas of the heart muscles that can be reached during a simulation pulse within a predetermined period of time.

A method is provided for establishing a communication session with an implantable medical device (“IMD”). The method includes configuring an IMD and an external device to communicate with one another through a protocol that utilizes a dedicated advertisement channel. The advertisement period and the scan period of the protocol are independent of one another such that the advertisement and scan periods at least partially overlap intermittently after a number of cycles. When the external device detects one of the advertisement notices, the method includes establishing a communications link between the external device and the IMD.