EP0094758A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tachyarrythmia pacer
Assignee: Medtronic Inc
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Filing: 1983-05-03
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Granted: —
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Expires: 2003-05-03
Abstract
Abstract A pacer subsystem for detecting the existence of tachyarrhythmia including means for measuring the average time interval between successive heart beats and for comparing a sample beat with both a percentage of this average, and with a preset time interval. If the sample beat period is less than both criteria, it is classified as a tachy beat. If the sample beat is longer than either time interval it is classified as a non-tachy beat. Sequences of tachy beats are used to initiate an appropriate therapeutic stimulation regime. The pacer includes a central processing unit 18 and real time controller 22 connected to the heart by lead system 14 and providing functions such as timing, sensing and generating output pulses.
Inventors
- 👤 Jerome T. Hartlaub
- 👤 Paul J. Beckmann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3621
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A pacer of the type having at least one sense amplifier for detecting depolarization of cardiac tissue and at least one output amplifier for providing electrical stimulation to the cardiac tissue and comprising: timing means for determining time periods between successive cardiac depolarizations; averaging means for calculating the average time period for a preselected number of said time periods producing a running average period; means for calculating a running average threshold period from said running average period; means for comparing a time period with said running average threshold period producing a first criterion detection signal if said time period is less than or equal to said running average threshold period; means for comparing said time period with a preselected programmed threshold period and for producing a second criterion detection signal if said time signal is less than or equal to the programmed threshold period; means responsive to said first and second criteria detection signals for incrementing a tachy beat counter; and means responsive to said tachy beat counter for initiating a tachyarrhythmia treatment regime.
Claim 2
Dependent Claim
174 words
A pacer of the type having at least one sense amplifier for detecting depolarization of cardiac tissue and at least one output amplifier for providing electrical stimulation to the cardiac tissue and comprising: timing means for determining time periods between successive cardiac depolarizations; averaging means for calculating the average time period for a preselected number of said time periods producing a running average period; means for calculating a running average threshold period from said running average period; means for comparing a time period with said running average threshold period producing a first criterion detection signal if said time period is less than or equal to said running average threshold period; means for comparing said time period with a preselected programmed threshold period and for producing a second criterion detection signal if said time signal is less than or equal to the programmed threshold period; means responsive to said first and second criteria detection signals for incrementing a tachy beat counter; and means responsive to said tachy beat counter for initiating a tachyarrhythmia treatment regime.
Claim 3
Dependent Claim
22 words
A pacer as claimed in claim 1 further including a telemetry system for permitting the non-invasive interrogation of said tachy beat counter.
Claim 4
Dependent Claim
20 words
A pacer as claimed in claim 2 wherein said telemetry system permits the non-invasive resetting of said tachy beat counter.
Claim 5
Dependent Claim
23 words
A pacer as claimed in claim 2 or 3 wherein said telemetry system permits the non-invasive alteration of said running average threshold period.
Claim 6
Dependent Claim
23 words
A pacer as claimed in claim 2, 3 or 4 wherein said telemetry system permits the non-invasive alteration of said programmed threshold period.
Claim 7
Dependent Claim
27 words
A pacer as claimed in any of claims 2 to 5 wherein said telemetry system permits the non-invasive alteration of said preselected number of said time periods.
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