Dual sensing for brady-tachy pacemaker/ICD
First Claim
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1. A system comprising:
- a primary cardiac signal sensing circuit operable to sense at least a first intrinsic cardiac signal, wherein the primary cardiac signal sensing circuit is configured to be coupled to a first and a second implantable electrode and has a first signal sensing sensitivity configured to detect bradycardia and a second higher sensitivity to simultaneously detect tachyarrhythmia;
at least one secondary cardiac signal sensing circuit operable to sense at least a second intrinsic cardiac signal, wherein the secondary cardiac signal sensing circuit is configured to be coupled to at least a third implantable electrode different from the first and second electrode, has a higher signal sensing sensitivity than the primary sensing circuit, and is configured to detect ventricular tachycardia; and
a controller circuit, coupled to the primary and secondary cardiac signal sensing circuits, the controller circuit operable to;
detect tachyarrhythmia and bradycardia using the primary sensing circuit;
detect tachyarrhythmia using the secondary sensing circuit; and
deem the tachyarrhythmia valid if the controller circuit detects the tachyarrhythmia using both the primary and secondary sensing circuits.
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Abstract
A system detects events related to cardiac activity. The system comprises a primary cardiac signal sensing circuit, at least one secondary cardiac signal sensing circuit having a higher sensitivity than the primary sensing circuit, and a controller circuit coupled to the primary and secondary cardiac signal sensing circuits. The controller circuit determines a rate of depolarization using the primary sensing circuit and detects tachyarrhythmia using the rate. The controller circuit also detects tachyarrhythmia using the secondary sensing circuit and also deems the tachyarrhythmia valid if the controller circuit detects the tachyarrhythmia using both the primary and secondary sensing circuit.
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Citations
23 Claims
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1. A system comprising:
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a primary cardiac signal sensing circuit operable to sense at least a first intrinsic cardiac signal, wherein the primary cardiac signal sensing circuit is configured to be coupled to a first and a second implantable electrode and has a first signal sensing sensitivity configured to detect bradycardia and a second higher sensitivity to simultaneously detect tachyarrhythmia; at least one secondary cardiac signal sensing circuit operable to sense at least a second intrinsic cardiac signal, wherein the secondary cardiac signal sensing circuit is configured to be coupled to at least a third implantable electrode different from the first and second electrode, has a higher signal sensing sensitivity than the primary sensing circuit, and is configured to detect ventricular tachycardia; and a controller circuit, coupled to the primary and secondary cardiac signal sensing circuits, the controller circuit operable to; detect tachyarrhythmia and bradycardia using the primary sensing circuit; detect tachyarrhythmia using the secondary sensing circuit; and deem the tachyarrhythmia valid if the controller circuit detects the tachyarrhythmia using both the primary and secondary sensing circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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sensing a first intrinsic cardiac signal associated with a depolarization rate of a heart using a primary sensing circuit, the primary sensing circuit configured to be coupled to a first and a second implantable electrode and having a first signal sensing sensitivity configured to detect bradycardia and a second higher sensitivity configured to simultaneously detect tachyarrhythmia; sensing a second intrinsic cardiac signal of the heart using at least one secondary sensing circuit, wherein the secondary sensing circuit is configured to be coupled to a third implantable electrode different from the first and second electrode, has a higher signal sensing sensitivity than the primary sensing circuit, and is configured to detect ventricular tachycardia; detecting tachyarrhythmia using the primary sensing circuit; determining whether tachyarrhythmia is indicated by the secondary sensing circuit; and deeming the tachyarrhythmia as valid if both the primary and secondary sensing circuits indicate tachyarrhythmia. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification