Cross-channel noise detector in implantable medical devices

摘要

An apparatus comprises a primary cardiac signal sensing circuit to sense a first cardiac signal, a secondary cardiac signal sensing to sense a second cardiac signal, and an arrhythmia detection circuit. The primary sensing circuit includes at least first and second implantable electrodes, and the secondary sensing circuit includes a third implantable electrode to deliver high-energy shock therapy. The arrhythmia detection circuit detects tachyarrhythmia using the primary sensing circuit, determines correspondence between events sensed with the primary sensing circuit and events sensed with the secondary sensing circuit, and deems whether a detected rhythm is indicative of noise or is indicative of an arrhythmia according to the determined correspondence.

主权项

1. An apparatus comprising:
a primary cardiac signal sensing circuit configured to sense at least a first cardiac signal, the primary cardiac signal sensing circuit including or configured to be coupled to at least first and second implantable electrodes; at least one secondary cardiac signal sensing circuit configured to sense at least a second cardiac signal, the secondary cardiac signal sensing circuit including or configured to be coupled to at least a third implantable electrode, different from the first and second electrode, configured to deliver high-energy shock therapy; and an arrhythmia detection circuit communicatively coupled to the primary and secondary cardiac signal sensing circuits, wherein the arrhythmia detection circuit is configured to:
detect an episode of tachyarrhythmia using the primary sensing circuit;determine a measure of one-to-one correspondence of one or more depolarization events sensed with the primary sensing circuit to one or more depolarization events sensed with the secondary sensing circuit during the detected episode of tachyarrhythmia; andgenerate an indication of whether a detected rhythm is indicative of noise or is indicative of tachyarrhythmia according to the determined measure of correspondence.