Abstract: An implantable cardiac stimulator includes a cardioversion/defibrillation unit connectable to at least one ventricular sensing electrode and one ventricular defibrillation electrode, and is designed to generate and deliver cardioversion or defibrillation shocks. A ventricular sensing unit having automatic threshold adaptation is connectable to the ventricular sensing electrode, and is designed to process the signals of the sensing electrode and detect a chamber contraction, and if a chamber contraction is detected, to output a ventricular sensing signal. The ventricular sensing unit processes the signals of the sensing electrode with at least two switchable sensing thresholds wherein after every sense, a VF detection window is started at a first lower sensing threshold; once the VF detection window has passed, a T wave blanking window is activated at an upper second sensing threshold; and once the T wave blanking window has passed, sensing at a second lower threshold is started.

Abstract: The invention relates to an implantable ventricular heart stimulator (10), comprising an at least partially electrically conductive housing (12), an electrode line terminal for connection of a ventricular defibrillation electrode line (20) and a terminal for a defibrillation electrode (26). According to the invention, the heart stimulator has a far-field electrocardiogram detection unit (70) which has a first input connected to the terminal for the ventricular defibrillation electrode and has a second input connected to the electrically conductive housing and designed or configured to generate a far-field electrocardiogram on the basis of the electric potentials applied to the two inputs during operation.

Abstract: An implantable cardiac stimulator includes a cardioversion/defibrillation unit connectable to at least one ventricular sensing electrode and one ventricular defibrillation electrode, and is designed to generate and deliver cardioversion or defibrillation shocks. A ventricular sensing unit having automatic threshold adaptation is connectable to the ventricular sensing electrode, and is designed to process the signals of the sensing electrode and detect a chamber contraction, and if a chamber contraction is detected, to output a ventricular sensing signal. The ventricular sensing unit processes the signals of the sensing electrode with at least two switchable sensing thresholds wherein after every sense, a VF detection window is started at a first lower sensing threshold; once the VF detection window has passed, a T wave blanking window is activated at an upper second sensing threshold; and once the T wave blanking window has passed, sensing at a second lower threshold is started.

Abstract: An electromedical implant having a far-field electrocardiogram detection unit connected or connectable to at least two implantable electrodes, at least one electrode of which is to be placed in the right atrium or right ventricle and is designed to record a far-field electrocardiogram via the terminal for the electrode to be placed in the right atrium or the right ventricle and one other electrode. The far-field electrocardiogram detection unit is connected to a far-field electrocardiogram evaluation unit, which is configured to detect signal features of the far-field electrocardiogram associated with an excitation or contraction of the left atrium and/or the left ventricle of the heart in a far-field electrocardiogram recorded by the far-field electrocardiogram detection unit.

Abstract: A single-chamber cardiac stimulator (10) with at least partially electrically conductive housing (12) and first detection unit (52) connected via a ventricular electrode line to at least one ventricular electrode and another electrode and configured to record ventricular cardiac activity with first electrocardiogram signal via the ventricular electrode and additional electrode, comprises a second detection unit (70), connected via the ventricular electrode line to at least one electrode of the ventricular electrode line and is connected to another electrode and configured to record a second electrocardiogram signal simultaneously with the first electrocardiogram signal via these electrodes, such that at least one of the two electrodes by means of which the second electrocardiogram signal is to be recorded is another electrode by means of which the first electrocardiogram signal is to be recorded, so that the electrocardiogram signals form ECG leads whose vectors are not equal to 0° or 180°.

Abstract: An implantable cardiac stimulator having an at least partially electrically conductive housing, a ventricular stimulation unit connectable to left ventricular or right ventricular stimulation electrode and designed to generate ventricular stimulation pulses for stimulation of heart ventricle, having terminal for right ventricular defibrillation electrode. Has far-field electrogram detection unit (FFEDU) and stimulation success detecting unit (SSDU), of which FFEDU has first input connected to the terminal for right ventricular defibrillation electrode and second input connected to housing. FFEDU detects far-field electrocardiogram based on electric potentials applied to inputs and deliver these potentials to SSDU.

Abstract: A single-chamber cardiac stimulator (10) with at least partially electrically conductive housing (12) and first detection unit (52) connected via a ventricular electrode line to at least one ventricular electrode and another electrode and configured to record ventricular cardiac activity with first electrocardiogram signal via the ventricular electrode and additional electrode, comprises a second detection unit (70), connected via the ventricular electrode line to at least one electrode of the ventricular electrode line and is connected to another electrode and configured to record a second electrocardiogram signal simultaneously with the first electrocardiogram signal via these electrodes, such that at least one of the two electrodes by means of which the second electrocardiogram signal is to be recorded is another electrode by means of which the first electrocardiogram signal is to be recorded, so that the electrocardiogram signals form ECG leads whose vectors are not equal to 0° or 180°.

Abstract: An electromedical implant having a far-field electrocardiogram detection unit connected or connectable to at least two implantable electrodes, at least one electrode of which is to be placed in the right atrium or right ventricle and is designed to record a far-field electrocardiogram via the terminal for the electrode to be placed in the right atrium or the right ventricle and one other electrode. The far-field electrocardiogram detection unit is connected to a far-field electrocardiogram evaluation unit, which is configured to detect signal features of the far-field electrocardiogram associated with an excitation or contraction of the left atrium and/or the left ventricle of the heart in a far-field electrocardiogram recorded by the far-field electrocardiogram detection unit.

Abstract: The invention relates to an implantable ventricular heart stimulator (10), comprising an at least partially electrically conductive housing (12), an electrode line terminal for connection of a ventricular defibrillation electrode line (20) and a terminal for a defibrillation electrode (26). According to the invention, the heart stimulator has a far-field electrocardiogram detection unit (70) which has a first input connected to the terminal for the ventricular defibrillation electrode and has a second input connected to the electrically conductive housing and designed or configured to generate a far-field electrocardiogram on the basis of the electric potentials applied to the two inputs during operation.

Abstract: An implantable cardiac stimulator having an at least partially electrically conductive housing, a ventricular stimulation unit connectable to left ventricular or right ventricular stimulation electrode and designed to generate ventricular stimulation pulses for stimulation of heart ventricle, having terminal for right ventricular defibrillation electrode. Has far-field electrogram detection unit (FFEDU) and stimulation success detecting unit (SSDU), of which FFEDU has first input connected to the terminal for right ventricular defibrillation electrode and second input connected to housing. FFEDU detects far-field electrocardiogram based on electric potentials applied to inputs and deliver these potentials to SSDU.