Dual chamber pacemaker with single pass lead and with bipolar and unipolar signal processing capability
First Claim
1. A dual chamber pacing system for cardiac pacing of a patient, comprising:
- pulse means for generating pacing pulses;
a single pass lead for delivering pacing pulses to the patient'"'"'s heart and for sensing cardiac signals from the patient'"'"'s atrium and ventricle, said lead comprising at least one electrode positioned thereon for placement in said atrium and one electrode positioned thereon for placement in said ventricle;
an indifferent electrode;
sensing means for sensing signals between respective pairs of said atrial, ventricular and indifferent electrodes;
enabling means for cyclically enabling one or more of said signals for processing, said enabling means comprises programmable means for cyclically enabling at least two signals sensed at two respective pairs of said electrode; and
processing means for processing said enabled signals for interpreting the type of event represented by said each said sensed signal.
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Accused Products
Abstract
There is provided an implantable cardiac pacing system, having multiple sensing channels for sensing spontaneous cardiac signals which arise between respective different pairs of electrodes. In a preferred embodiment, the system utilizes a single pass VDD-type lead, having at least one atrial ring electrode for sensing atrial signals, and at least a distal tip electrode positioned in the right ventricle for sensing ventricular signals. Sensing channels concurrently process signals between the atrial ring and the pacemaker can (the indifferent electrode); the ventricular tip electrode and the pacemaker can; and the between the atrial ring and the ventricular tip. One or more additional electrode pairs can also be employed. Enable signals selectively enable the channels to be used for concurrent processing of the signals. The signal processing embodies both pattern recognition and timing, for analysis and interpretation of the type of event which gives rise to the different concurrent signals on the respective different channels.
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Citations
19 Claims
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1. A dual chamber pacing system for cardiac pacing of a patient, comprising:
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pulse means for generating pacing pulses; a single pass lead for delivering pacing pulses to the patient'"'"'s heart and for sensing cardiac signals from the patient'"'"'s atrium and ventricle, said lead comprising at least one electrode positioned thereon for placement in said atrium and one electrode positioned thereon for placement in said ventricle; an indifferent electrode; sensing means for sensing signals between respective pairs of said atrial, ventricular and indifferent electrodes; enabling means for cyclically enabling one or more of said signals for processing, said enabling means comprises programmable means for cyclically enabling at least two signals sensed at two respective pairs of said electrode; and processing means for processing said enabled signals for interpreting the type of event represented by said each said sensed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cardiac pacing system for pacing a patient'"'"'s heart, comprising:
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pulse generator means for generating pacing pulses; lead means for delivering pacing pulses to at least one chamber of the patient'"'"'s heart, and for obtaining cardiac signals from the patient'"'"'s atrium and ventricle, said lead means having an atrial electrode for obtaining signals from said patient'"'"'s atrium and a ventricular electrode for obtaining signals from the patient'"'"'s ventricle; an indifferent electrode; sense means for concurrently sensing any cardiac signals obtained from any one of the three respective pairs of said electrodes; and comparing means for comparing said sensed signals to interpret the underlying cardiac activity which caused said any sensed signals, wherein said comparing means comprises timing means for comparing the relative timing of selected ones of said signals and pattern means for analyzing the patterns of selected ones of said signals, and further comprising programming means for programming which signals are operated on by said timing means and said pattern means. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification