Pacemaker with safety pacing
First Claim
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1. A dual chamber pacemaker comprising:
- atrial pacing means for generating atrial pacing pulses for the atrium;
ventricular sensing means for sensing activity in the ventricle;
ventricular pacing means for generating ventricular pacing pulses for the ventricle;
a-v interval means for defining an a-v interval between atrial and ventricle activities;
monitoring means for defining a monitoring window within said a-v delay and for detecting an abnormal signal during said monitoring window;
feature extracting means for extracting features of said abnormal signal;
categorizing means for categorizing said abnormal signal as one of a plurality of preselected signals based on said features; and
safety pacing means for generating a ventricular signal if said categorizing means does not categorize said abnormal signal.
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Abstract
In a cardiac pacemaker, a monitoring window is defined during the a-v delay during which signals sensed in the ventricular channel are monitored. If an abnormal signal is sensed during this window, certain features of this signal are analyzed to determine its origin, such as PVC. If the signal cannot be categorized as a known signal, a safety pacing pulse is applied.
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Citations
14 Claims
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1. A dual chamber pacemaker comprising:
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atrial pacing means for generating atrial pacing pulses for the atrium; ventricular sensing means for sensing activity in the ventricle; ventricular pacing means for generating ventricular pacing pulses for the ventricle; a-v interval means for defining an a-v interval between atrial and ventricle activities; monitoring means for defining a monitoring window within said a-v delay and for detecting an abnormal signal during said monitoring window; feature extracting means for extracting features of said abnormal signal; categorizing means for categorizing said abnormal signal as one of a plurality of preselected signals based on said features; and safety pacing means for generating a ventricular signal if said categorizing means does not categorize said abnormal signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a dual chamber pacemaker wherein an a-v interval is defined between atrial and ventricular events, a method of generating a ventricular safety pacing pulse comprising the steps of:
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defining a window within said a-v interval; monitoring during said window the ventricular chamber for an abnormal signal; classifying said abnormal signal, when detected, as one of a preselected signals; and generating said ventricular safety pacing signal if said ventricular signal cannot be classified during said classifying step. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification