Pacemaker with automatic blanking period function
First Claim
1. A cardiac stimulation system comprising:
- pacing means for generating cardiac pacing signals of a patient;
sensing means for sensing cardiac activity in a cardiac chamber, said sensing means generating sense signals corresponding said cardiac activity;
signal processing means for processing said sense signals;
blanking signal generating means for generating blanking signals, said blanking signals being provided for selectively blanking said signal processing means; and
automatic blanking determining means for determining a minimum duration of said blanking signals dependent on physiological characteristics of said heart wherein said automatic blanking determining means includes means for generating a test pacing signal for said heart and test sensing means for sensing activity in said heart responsive to said test pacing signal.
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Accused Products
Abstract
The blanking periods for an implantable cardiac device, such as a pacemaker, is determined by providing an excitation in a cardiac chamber and monitoring the corresponding cardiac activity. For in-channel blanking periods, the response from the same chamber is monitored while for cross-channel blanking period, the other cardiac chamber is monitored. The optimal blanking period is then determined based on the cardiac activity. This period is programmed directly into the device, or transmitted to an external programmer where it is used to provide guidance to a health care professional. The optimal blanking period duration may also be determined using other signals sensed by the programmer, using ECG'"'"'s or MTE'"'"'s.
224 Citations
17 Claims
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1. A cardiac stimulation system comprising:
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pacing means for generating cardiac pacing signals of a patient; sensing means for sensing cardiac activity in a cardiac chamber, said sensing means generating sense signals corresponding said cardiac activity; signal processing means for processing said sense signals; blanking signal generating means for generating blanking signals, said blanking signals being provided for selectively blanking said signal processing means; and automatic blanking determining means for determining a minimum duration of said blanking signals dependent on physiological characteristics of said heart wherein said automatic blanking determining means includes means for generating a test pacing signal for said heart and test sensing means for sensing activity in said heart responsive to said test pacing signal. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable cardiac device for implantation in a patient for stimulating the patient'"'"'s heart, comprising:
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pacing means for generating pacing pulses for a first cardiac chamber; sensing means for sensing cardiac activity in said heart; blanking means for blanking said sensing means for at least a blanking period following said cardiac activity; determining means for determining a duration of said blanking period based on a physiology of said heart, wherein said determining means generates a test signal in said first chamber, measures a response to said test signal and determines said duration in accordance with said response. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification