Therapeutic device and method using feedback from implantable pressure sensor
First Claim
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1. A method of internally monitoring a subject and providing, if appropriate, cardiac electrical therapy to the subject, the method comprising:
- implanting within the subject a cardiac defibrillator comprising a pulse generator, processing circuitry, and electrodes that are positioned to sense cardiac electrical waveforms and to provide, if needed, cardiac therapy in a form of electrical defibrillation stimulation;
implanting within the subject a pressure sensing device comprising a pressure transmission catheter and a transducer in communication with the pressure transmission catheter, the pressure sensing device being implanted so that a distal sensing tip of the pressure transmission catheter is positioned within an artery accessible in a subcutaneous pectoral region of the chest, but the transducer of the pressure sensing device remains outside of the artery;
receiving, within the implanted cardiac defibrillator, cardiac electrical activity waveform information sensed by the electrodes and pressure waveform information for the artery sensed by the implanted pressure sensor; and
providing the cardiac therapy in the form of electrical defibrillation stimulation if the processing circuitry of the implanted cardiac therapeutic device determines that an evaluation of both the cardiac electrical activity waveform information and the pressure waveform information shows there is occurring an aberrant rhythm for which therapy is appropriate.
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Abstract
Devices and methods to reduce the incidence of both false positive and false negative detection of rhythm anomalies. Implantable devices that measure vascular pressure, vascular blood flow, tissue perfusion, and/or intracardial pressure provide feedback directly to the therapeutic device to improve aberrant rhythm detection.
28 Citations
23 Claims
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1. A method of internally monitoring a subject and providing, if appropriate, cardiac electrical therapy to the subject, the method comprising:
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implanting within the subject a cardiac defibrillator comprising a pulse generator, processing circuitry, and electrodes that are positioned to sense cardiac electrical waveforms and to provide, if needed, cardiac therapy in a form of electrical defibrillation stimulation; implanting within the subject a pressure sensing device comprising a pressure transmission catheter and a transducer in communication with the pressure transmission catheter, the pressure sensing device being implanted so that a distal sensing tip of the pressure transmission catheter is positioned within an artery accessible in a subcutaneous pectoral region of the chest, but the transducer of the pressure sensing device remains outside of the artery; receiving, within the implanted cardiac defibrillator, cardiac electrical activity waveform information sensed by the electrodes and pressure waveform information for the artery sensed by the implanted pressure sensor; and providing the cardiac therapy in the form of electrical defibrillation stimulation if the processing circuitry of the implanted cardiac therapeutic device determines that an evaluation of both the cardiac electrical activity waveform information and the pressure waveform information shows there is occurring an aberrant rhythm for which therapy is appropriate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for internally monitoring a subject and providing, if appropriate, cardiac electrical therapy to the subject, the method comprising:
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an implantable cardiac defibrillator comprising a pulse generator, processing circuitry, and electrodes that are positionable to sense cardiac electrical waveforms and to provide, if needed, cardiac therapy in a form of electrical defibrillation stimulation; and an implantable pressure sensing device comprising a pressure transmission catheter and a transducer in communication with the pressure transmission catheter, the pressure sensing device being implantable so that a distal sensing tip of the pressure transmission catheter is positionable within an artery accessible in a subcutaneous pectoral region of the chest, but the transducer of the pressure sensing device remains outside of the artery; wherein the implantable cardiac defibrillator is programmed to receive cardiac electrical activity waveform information sensed by the electrodes and pressure waveform information for the artery sensed by the implantable pressure sensor, and is further programmed to direct that cardiac therapy be provided in the form of electrical defibrillation stimulation if the processing circuitry determines that an evaluation of both the cardiac electrical activity waveform information and the pressure waveform information shows there is occurring an aberrant rhythm for which therapy is appropriate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification