Wireless ECG in implantable devices
First Claim
1. A cardiac rhythm management system comprising:
- a plurality of implantable electrodes configured for sensing cardiac signals each approximating a surface electrocardiogram (ECG) vector; and
an implantable medical device including;
a programmable sensing circuit including a plurality of sensing channels providing for simultaneous sensing of the cardiac signals, the programmable sensing circuit configured to be programmed in response to an ECG acquisition command for a frequency response suitable for sensing the cardiac signals each approximating the surface ECG vector;
a programmable sense interface configured to be programmed in response to the ECG acquisition command to provide electrical connections each between one sensing channel of the plurality of sensing channels and two electrodes selected from the plurality of implantable electrodes; and
a processor configured to detect a predetermined cardiac condition and produce the ECG acquisition command in response to the predetermined cardiac condition being detected,wherein the plurality of implantable electrodes are incorporated onto the implantable medical device.
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Abstract
An implantable medical device such as an implantable pacemaker or implantable cardioverter/defibrillator includes a programmable sensing circuit providing for sensing of a signal approximating a surface electrocardiogram (ECG) through implanted electrodes. With various electrode configurations, signals approximating various standard surface ECG signals are acquired without the need for attaching electrodes with cables onto the skin. The various electrode configurations include, but are not limited to, various combinations of intracardiac pacing electrodes, portions of the implantable medical device contacting tissue, and electrodes incorporated onto the surface of the implantable medical device.
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Citations
20 Claims
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1. A cardiac rhythm management system comprising:
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a plurality of implantable electrodes configured for sensing cardiac signals each approximating a surface electrocardiogram (ECG) vector; and an implantable medical device including; a programmable sensing circuit including a plurality of sensing channels providing for simultaneous sensing of the cardiac signals, the programmable sensing circuit configured to be programmed in response to an ECG acquisition command for a frequency response suitable for sensing the cardiac signals each approximating the surface ECG vector; a programmable sense interface configured to be programmed in response to the ECG acquisition command to provide electrical connections each between one sensing channel of the plurality of sensing channels and two electrodes selected from the plurality of implantable electrodes; and a processor configured to detect a predetermined cardiac condition and produce the ECG acquisition command in response to the predetermined cardiac condition being detected, wherein the plurality of implantable electrodes are incorporated onto the implantable medical device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable medical device configured to be coupled to a plurality of implantable electrodes including at least first and second electrodes selectable for sensing a cardiac signal approximating a surface electrocardiogram (ECG), the implantable medical device including:
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a processor configured to detect a predetermined cardiac condition and produce an ECG acquisition command in response to the predetermined cardiac condition being detected; a programmable sensing circuit configured to be programmed in response to the ECG acquisition command to sense the cardiac signal approximating the surface ECG, the sensing circuit having a frequency response programmable for at least a surface ECG pass band suitable for sensing the cardiac signal approximating the surface ECG and an intracardiac electrogram pass band suitable for sensing an intracardiac electrogram; and a programmable sense interface configured to be programmed in response to the ECG acquisition command to provide electrical connections between the first and second electrodes and the programmable sensing circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification