Subcutaneous cardiac sensing and stimulation system
First Claim
1. A device, comprising:
- a housing configured for implantation in a patient;
an electrode arrangement configured to electrically couple to a heart of the patient;
a detector provided in the housing and coupled to the electrode arrangement, the detector configured to produce a cardiac electrophysiologic signal;
energy delivery circuitry provided in the housing and coupled to the electrode arrangement, the energy delivery circuitry configured to deliver at least an antitachycardia electrical therapy to the heart;
an implantable blood sensor configured to produce a blood sensor signal; and
a processor provided in the housing and coupled to the blood sensor, the detector, and the energy delivery circuitry, the processor configured to discriminate between a tachyarrhythmia requiring antitachycardia electrical therapy and a condition that does not require antitachycardia electrical therapy using the cardiac electrophysiologic signal and the blood sensor signal, the processor configured to assess afterload of a left ventricle of the heart using at least the blood sensor signal.
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Accused Products
Abstract
Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may be evaluated using the electrocardiogram signal and the blood sensor signal, and tachyarrhythmias may be treated after confirmation using the blood sense signal.
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Citations
19 Claims
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1. A device, comprising:
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a housing configured for implantation in a patient; an electrode arrangement configured to electrically couple to a heart of the patient; a detector provided in the housing and coupled to the electrode arrangement, the detector configured to produce a cardiac electrophysiologic signal; energy delivery circuitry provided in the housing and coupled to the electrode arrangement, the energy delivery circuitry configured to deliver at least an antitachycardia electrical therapy to the heart; an implantable blood sensor configured to produce a blood sensor signal; and a processor provided in the housing and coupled to the blood sensor, the detector, and the energy delivery circuitry, the processor configured to discriminate between a tachyarrhythmia requiring antitachycardia electrical therapy and a condition that does not require antitachycardia electrical therapy using the cardiac electrophysiologic signal and the blood sensor signal, the processor configured to assess afterload of a left ventricle of the heart using at least the blood sensor signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17)
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11. A device, comprising:
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a housing configured for implantation in a patient; an electrode arrangement configured to electrically couple to a heart of the patient; a detector provided in the housing and coupled to the electrode arrangement, the detector configured to produce a cardiac electrophysiologic signal; energy delivery circuitry provided in the housing and coupled to the electrode arrangement, the energy delivery circuitry configured to deliver at least an antitachycardia electrical therapy to the heart; an implantable blood sensor configured to produce a blood sensor signal; and a processor provided in the housing and coupled to the blood sensor, the detector, and the energy delivery circuitry, the processor configured to discriminate between a tachyarrhythmia requiring antitachycardia electrical therapy and a condition that does not require antitachycardia electrical therapy using the cardiac electrophysiologic signal and the blood sensor signal, the processor configured to verify that the cardiac electrophysiologic signal comprises a cardiac signal having a QRS complex using at least the blood sensor signal and to assess cardiac function of the patient'"'"'s heart using at least the blood sensor signal. - View Dependent Claims (12, 13, 14, 15, 16)
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18. A method, comprising:
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implantably producing a cardiac electrophysiologic signal indicative of electrical activity of a patient'"'"'s heart; implantably producing a blood sensor signal; discriminating between a tachyarrhythmia requiring antitachycardia electrical therapy and a condition that does not require antitachycardia electrical therapy using the cardiac electrophysiologic signal and the blood sensor signal; implantably delivering antitachycardia electrical therapy to the patient'"'"'s heart to treat the tachyarrhythmia requiring antitachycardia electrical therapy; and assessing one or both of afterload of a left ventricle of the heart and cardiac function of the patient'"'"'s heart using at least the blood sensor signal. - View Dependent Claims (19)
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Specification