US5819741A
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Cardiac monitoring system and method
Assignee: Ortivus AB
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Filing: 1996-05-24
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Granted: 1998-10-13
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Expires: 2016-05-24
Abstract
Abstract A cardiac monitoring method and system provides advanced ischemia and infarction analysis and monitoring. Advanced calculations are performed on ECG signals to obtain parameter values relating to myocardial ischemia and infarction. Dominant heart beats are averaged to form a smooth beat, which is analyzed to determine the parameter values continuously and in real-time. The result of each analyzed time interval is presented as points in a trend graph on a monitoring display. All calculations are performed on-line and the trend curves are updated immediately. Systems and methods for monitoring, analyzing, and/or diagnosing cardiac activity that display a state of signals received from leads attached to a patient on a graphic depiction of the patient are also provided. The graphic depiction of the patient may include electrode position information.
Inventors
- 👤 Per Karlsson
- 👤 Gunilla Lundahl
- 👤 Michael Oljemark
- 👤 Johan Ubby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/06; A61B5/061; A61B5/0002; A61B5/0004; A61B5/0006; A61B5/24; A61B5/25; A61B5/276; A61B5/279; A61B5/28; A61B5/316; A61B5/318; A61B5/327; A61B5/339; A61B5/341; A61B5/346; A61B5/349; A61B5/35; A61B5/366; A61B5/74; A61B5/7475; A61B5/363; A61B5/72; A61B5/7203; A61B5/7217; A61B5/7221
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
176 words
A system for monitoring, analyzing, and/or diagnosing the cardiac activity of a patient, comprising: plurality of electrodes positioned at a respective plurality of locations on the patient for directing a respective plurality of electrical signals from the patient; ECG data production means connected to the plurality of electrodes for acquiring said plurality of electrical signals directed by the plurality of electrodes and for producing ECG data in response to the acquired electrical signals; display means connected to the ECG data production means for displaying a graphic depiction of at least part of the patient, the location, on the graphic depiction of at least part of the patient, of each of said plurality of electrodes, and a status of each of said electrical signals directed from said plurality of electrodes, wherein the status of each of said electrical signals directed from each of said plurality of electrodes includes at least one condition in which the electrical signal has a value such that the ECG production means is unable to produce a valid ECG signal in response thereto.
Claim 2
Independent Claim
176 words
A system for monitoring, analyzing, and/or diagnosing the cardiac activity of a patient, comprising: plurality of electrodes positioned at a respective plurality of locations on the patient for directing a respective plurality of electrical signals from the patient; ECG data production means connected to the plurality of electrodes for acquiring said plurality of electrical signals directed by the plurality of electrodes and for producing ECG data in response to the acquired electrical signals; display means connected to the ECG data production means for displaying a graphic depiction of at least part of the patient, the location, on the graphic depiction of at least part of the patient, of each of said plurality of electrodes, and a status of each of said electrical signals directed from said plurality of electrodes, wherein the status of each of said electrical signals directed from each of said plurality of electrodes includes at least one condition in which the electrical signal has a value such that the ECG production means is unable to produce a valid ECG signal in response thereto.
Claim 3
Dependent Claim
62 words
The system of claim 1, wherein said display means includes a plurality of electrode status indicators, each of said plurality of electrode status indicators being disposed on the graphical depiction of at least part of the patient at a position substantially corresponding to one of said plurality of locations on the patient at which one of said plurality of electrodes is positioned.
Claim 4
Dependent Claim
38 words
The system of claim 2, wherein said display means includes a plurality of electrode status annunciators, each of said plurality of electrode status annunciators being alphanumeric indicators and corresponding to at least one of said electrode status indicators.
Claim 5
Dependent Claim
140 words
The system of claim 3, wherein the status of each of said plurality of electrical signals directed from each of the plurality of electrodes further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means, a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, a third condition in which the electrical signal exhibits baseline drift, and a fourth condition in which the signal exhibits a spike, wherein each of said plurality of electrode status indicators produces a graphic output when the electrical signal corresponding thereto is in one of the first, second, third, or fourth conditions and each of said electrode status annunciators indicates which of said conditions the corresponding electrical signal is in.
Claim 6
Dependent Claim
29 words
The system of claim 4, wherein each of said electrode status annunciators is adapted to selectively display an impedance value of at least one of said plurality of electrodes.
Claim 7
Dependent Claim
119 words
The system of claim 2, wherein the status of each of said plurality of electrical signals directed from each of the plurality of electrodes further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means and a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, wherein each of said plurality of electrode status indicators produces a first graphic output when the electrical signal corresponding thereto is in the first condition and each of said electrode status indicators produces a second graphic output when the electrical signal corresponding thereto is in the second condition.
Claim 8
Dependent Claim
14 words
The system of claim 2, wherein said display means comprises a cathode ray tube.
Claim 9
Dependent Claim
13 words
The system of claim 2, wherein said display means comprises a plasma display.
Claim 10
Dependent Claim
14 words
The system of claim 2, wherein said display means comprises a liquid crystal display.
Claim 11
Dependent Claim
13 words
The system of claim 2, wherein said display means comprises an electroluminescent display.
Claim 12
Dependent Claim
75 words
The system of claim 1, wherein said display means includes a translucent overlay having a graphical depiction of at least part of the patient and a plurality of light production means disposed behind the translucent overlay, each of said plurality of light production means being disposed behind the transparent overlay at a position substantially corresponding to one of said plurality of locations on the patient at which one of said plurality of electrodes is positioned.
Claim 13
Dependent Claim
19 words
The system of claim 11, wherein each of said plurality of light production means is a light emitting diode.
Claim 14
Dependent Claim
117 words
The system of claim 12, wherein the status of each of said plurality of electrical signals directed from each of the plurality of electrodes further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means and a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, wherein each of said light emitting diodes produces a first light output when the electrical signal corresponding thereto is in the first condition and each of said light emitting diodes produces a second light output when the electrical signal corresponding thereto is in the second condition.
Claim 15
Independent Claim
128 words
A method for monitoring, analyzing, and/or diagnosing the cardiac activity of a patient, comprising: positioning a plurality of electrodes at a respective plurality of locations on the patient for directing a respective plurality of electrical signals from the patient; acquiring said plurality of electrical signals by connecting ECG data production means to the plurality of electrodes; producing ECG data in response to the acquired electrical signals; and displaying on display means connected to the ECG production means the location, on the patient, of each of said plurality of electrodes and a status of each of said electrical signals, wherein the status of each of said electrical signal has a value such that the ECG data production means is unable to produce a valid ECG signal in response thereto.
Claim 16
Independent Claim
128 words
A method for monitoring, analyzing, and/or diagnosing the cardiac activity of a patient, comprising: positioning a plurality of electrodes at a respective plurality of locations on the patient for directing a respective plurality of electrical signals from the patient; acquiring said plurality of electrical signals by connecting ECG data production means to the plurality of electrodes; producing ECG data in response to the acquired electrical signals; and displaying on display means connected to the ECG production means the location, on the patient, of each of said plurality of electrodes and a status of each of said electrical signals, wherein the status of each of said electrical signal has a value such that the ECG data production means is unable to produce a valid ECG signal in response thereto.
Claim 17
Dependent Claim
73 words
The method of claim 14, wherein said display means includes a graphical depiction of at least part of the patient and a plurality of electrode status indicators, each of said plurality of electrode status indicators being disposed on the graphical depiction of at least part of the patient at a position substantially corresponding to one of said plurality of locations on the patient at which one of said plurality of electrodes is positioned.
Claim 18
Dependent Claim
38 words
The method of claim 15, wherein said display means includes a plurality of electrode status annunciators, each of said plurality of electrode status annunciators being alphanumeric indicators and corresponding to at least one of said electrode status indicators.
Claim 19
Dependent Claim
140 words
The method of claim 16, wherein the status of each of said plurality of electrical signals directed from each of the plurality of electrodes further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means, a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, a third condition in which the electrical signal exhibits baseline drift, and a fourth condition in which the signal exhibits a spike, wherein each of said plurality of electrode status indicators produces a graphic output when the electrical signal corresponding thereto is in one of the first, second, third, or fourth conditions and each of said electrode status annunciators indicates which of said conditions the corresponding electrical signal is in.
Claim 20
Dependent Claim
111 words
The method of claim 15, wherein the status of each of said plurality of electrical signals further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means and a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, wherein each of said plurality of electrode status indicators produces a first graphic output when the electrical signal corresponding thereto is in the first condition and each of said electrode status indicators produces a second graphic output when the electrical signal corresponding thereto is in the second condition.
Claim 21
Dependent Claim
75 words
The method of claim 14, wherein said display means includes a translucent overlay having a graphical depiction of at least part of the patient and a plurality of light production means disposed behind the translucent overlay, each of said plurality of light production means being disposed behind the transparent overlay at a position substantially corresponding to one of said plurality of locations on the patient at which one of said plurality of electrodes is positioned.
Claim 22
Dependent Claim
19 words
The method of claim 19, wherein each of said plurality of light production means is a light emitting diode.
Claim 23
Dependent Claim
109 words
The method of claim 20, wherein the status of each of said plurality of electrical signals further includes a first condition in which the electrical signal is out of the acquisition range of the ECG production means and a second condition in which the electrical signal is too noisy for the ECG production means to produce a proper ECG signal in response thereto, wherein each of said light emitting diodes produces a steady light output when the electrical signal corresponding thereto is in the first condition and each of said light emitting diodes produces a blinking light output when the electrical signal corresponding thereto is in the second condition.
References Cited (Backward Citations)
US3548813A
Cited
US3858034A
Cited
US4213465A
Cited
US4570225A
Cited
US4850370A
Cited
US4924875A
Cited
US5038800A
Cited
US5410473A
Cited
US5469857A
Cited
US5520191A
Cited
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