Ventricular heart stimulator

摘要

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. The inventive heart stimulator also has a far-field electrocardiogram evaluation unit (72) which is connected to the far-field electrocardiogram detection unit and is designed to detect signal features characteristic of atrial depolarizations in a far-field electrocardiogram generated by the far-field electrocardiogram detection unit.

主权项

1. An implantable ventricular heart stimulator (10), comprising:
an at least partially electrically conductive housing (12); a terminal comprising a defibrillation electrode line terminal configured to connect a ventricular defibrillation electrode (26, 28) with a defibrillation electrode line (20) wherein said terminal is not connected to an atrial electrode line; a far-field electrocardiogram detection unit (70), which has a first input that is connected to the terminal for the ventricular defibrillation electrode and has a second input that is connected to the at least partially electrically conductive housing (12) and wherein the far-field electrocardiogram detection unit (70) is configured to
generate a far-field electrocardiogram based on electric potentials applied to the first input and second input; a far-field electrocardiogram evaluation unit (72) connected to the far-field electrocardiogram detection unit (70) and wherein the far-field electrocardiogram evaluation unit (72) is configured to
detect signal features characteristic of atrial depolarization in the far-field electrocardiogram generated by the far-field electrocardiogram detection unit (70); wherein said implantable ventricular heart stimulator does not comprise an atrial electrode line terminal; wherein the far-field electrocardiogram evaluation unit (72) is configured to detect sensing events or signal peaks in the far-field electrocardiogram which are not to be assigned to an intrinsic atrial event and to remove such signal peaks from the far-field electrocardiogram and then to further process the far-field electrocardiogram to detect atrial sensing events; and, wherein the implantable ventricular heart stimulator is configured as an implantable cardioverter/defibrillator and comprises a VT/SVT evaluation unit configured to make an assignment of ventricular arrhythmia to a supraventricular tachycardia or a ventricular tachycardia based on successive detected atrial events and successive ventricular events.