Abstract: 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.

Abstract: The present invention relates to a medical device, in particular to an implantable medical device, comprising at least one implantable or non-implantable hemodynamic sensor configured for detecting hemodynamic cardiac signals, a controller configured for processing and analyzing the detected cardiac hemodynamic signals or signals derived from the detected cardiac hemodynamic signals by applying to said signals a Teager Energy Operator (TEO). The controller further comprises at least one algorithm configured to determine the need for a defibrillation operation by taking into account the at least one output hemodynamic signal. The present invention also provides a method and software for detecting or treating a ventricular fibrillation episode by taking into account cardiac hemodynamic signals.

Abstract: A subcutaneous cardiac defibrillation system implantable comprising a housing and a subcutaneous implantable lead comprising a proximal end connected to the housing and a distal free end. The subcutaneous implantable lead comprises at least one defibrillation electrode and at least three detection electrodes. The first detection electrode and the second detection electrode form a first dipole, and 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, form a second dipole. The defibrillation electrode is positioned between the second detection electrode and the third detection electrode, the first dipole is positioned between the housing and the defibrillation electrode, the third electrode is positioned between the free distal end of the lead and the defibrillation electrode, and the length of the first dipole is shorter than the length of the second dipole.

Abstract: A subcutaneous cardiac defibrillation system implantable comprising a housing and a subcutaneous implantable lead comprising a proximal end connected to the housing and a distal free end. The subcutaneous implantable lead comprises at least one defibrillation electrode and at least three detection electrodes. The first detection electrode and the second detection electrode form a first dipole, and 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, form a second dipole. The defibrillation electrode is positioned between the second detection electrode and the third detection electrode, the first dipole is positioned between the housing and the defibrillation electrode, the third electrode is positioned between the free distal end of the lead and the defibrillation electrode, and the length of the first dipole is shorter than the length of the second dipole.

Abstract: A subcutaneous implantable active medical device, in particular a subcutaneous cardiac defibrillator, comprising a housing and a subcutaneous implantable lead connected to the housing. The subcutaneous implantable lead comprises a plurality of sensing electrodes forming at least two dipoles from which at least two electrical signals are collected concurrently. The first dipole having a first length less than a second length of the second dipole. The subcutaneous implantable active medical device further comprises a controller configured to determine whether or not tachyarrhythmia is present by determining a criterion of similarity based on the electrical signals collected concurrently via the first dipole and via the second dipole during a defined series of cardiac cycles that is such that detection of a depolarization peak, corresponding to detection of an R wave, is performed via the first dipole.

Abstract: The present invention relates to a medical device, in particular to an implantable medical device, comprising at least one implantable or non-implantable hemodynamic sensor configured for detecting hemodynamic cardiac signals, a controller configured for processing and analyzing the detected cardiac hemodynamic signals or signals derived from the detected cardiac hemodynamic signals by applying to said signals a Teager Energy Operator (TEO). The controller further comprises at least one algorithm configured to determine the need for a defibrillation operation by taking into account the at least one output hemodynamic signal. The present invention also provides a method and software for detecting or treating a ventricular fibrillation episode by taking into account cardiac hemodynamic signals.