Patent US4041468A successfully refreshed from Google Patents.
US4041468A
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Method and system for analysis of ambulatory electrocardiographic tape recordings
Assignee: Pfizer Inc
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Filing: 1976-10-07
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Granted: 1977-08-09
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Expires: 1996-10-07
Abstract
Abstract An ambulatory electrocardiographic tape recording (DCG) taken over an extended period of time, such as 24 hours, is analyzed with substantial accuracy by randomly selecting a sample of time periods of a specific duration (such as a 2% sample) and printing out a hard copy record of the electrocardiogram at these times for visual analysis. The simplicity of this method and the system performing it combined with high accuracy in quantifying cardiac arrhythmias makes it perferable for most clinical purposes to conventional methods of analyzing DCG's.
Inventors
- 👤 John H. Perry
- 👤 David S. Salsburg
- 👤 Colin R. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:08
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/333; A61B5/336
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A method for rapidly analyzing an electrocardiographic tape recording comprising the steps of generating and receiving an analog ECG signal from a tape reading device, applying a timing signal to the analog ECG signal to provide an ECG signal divided into segments of predetermined relatively short duration of time, selecting a random number of predetermined time segments constituting a relatively small percentage of the tape recording and plotting the selected segments for visual analysis.
Claim 2
Independent Claim
74 words
A method for rapidly analyzing an electrocardiographic tape recording comprising the steps of generating and receiving an analog ECG signal from a tape reading device, applying a timing signal to the analog ECG signal to provide an ECG signal divided into segments of predetermined relatively short duration of time, selecting a random number of predetermined time segments constituting a relatively small percentage of the tape recording and plotting the selected segments for visual analysis.
Claim 3
Dependent Claim
21 words
A method as set forth in claim 1 wherein approximately a 2-5% sample of the entire tape is selected for plotting.
Claim 4
Dependent Claim
21 words
A method as set forth in claim 1 wherein approximately a 2% sample of the entire tape is selected for plotting.
Claim 5
Dependent Claim
19 words
A method as set forth in claim 1 wherein the segments are of approximately less than one minute duration.
Claim 6
Dependent Claim
18 words
A method as set forth in claim 1 wherein the segments are of approximately a fifteen second duration.
Claim 7
Independent Claim
79 words
A system for rapidly analyzing an electrocardiographic tape recording comprising means for generating and receiving an analog ECG signal from a tape reading device, means for applying a timing signal to the analog ECG signal to provide an ECG signal divided into segments of predetermined relatively short duration of time, means for selecting a random number of predetermined time segments constituting a relatively small percentage of the tape recording, and means for plotting the selected segments for visual analysis.
Claim 8
Independent Claim
79 words
A system for rapidly analyzing an electrocardiographic tape recording comprising means for generating and receiving an analog ECG signal from a tape reading device, means for applying a timing signal to the analog ECG signal to provide an ECG signal divided into segments of predetermined relatively short duration of time, means for selecting a random number of predetermined time segments constituting a relatively small percentage of the tape recording, and means for plotting the selected segments for visual analysis.
Claim 9
Dependent Claim
27 words
A method as set forth in claim 6 wherein the selecting means is constructed and arranged to plot approximately a 2-5% sample of the entire tape recording.
Claim 10
Dependent Claim
27 words
A system as set forth in claim 6 wherein the selecting means is constructed and arranged to plot approximately a 2% sample of the entire tape recording.
Claim 11
Dependent Claim
30 words
A system as set forth in claim 6 wherein the means for applying a timing signal is constructed and arranged to provide time segments of less than one minute duration.
Claim 12
Dependent Claim
29 words
A system as set forth in claim 6 wherein the means for applying a timing signal is constructed and arranged to provide time segments of about fifteen second duration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |