CA1116244A - Process and device for processing and displaying a read-out signal from an electrocardiogram recording read at a speed greater than the speed of recording - Google Patents
Process and device for processing and displaying a read-out signal from an electrocardiogram recording read at a speed greater than the speed of recordingInfo
- Publication number
- CA1116244A CA1116244A CA327,291A CA327291A CA1116244A CA 1116244 A CA1116244 A CA 1116244A CA 327291 A CA327291 A CA 327291A CA 1116244 A CA1116244 A CA 1116244A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- period
- selectively
- pathological
- read signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
- A61B5/02455—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals provided with high/low alarm devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/333—Recording apparatus specially adapted therefor
- A61B5/336—Magnetic recording apparatus
- A61B5/337—Playback at speeds other than the recording speed
Abstract
ABSTRACT
The present invention relates to a process and device for processing and displaying an electrocardiogram signal read at a speed greater than the speed of recording, in which process a plu-rality of types of pathological complexes are selectively and simul-taneously detected with the aid of discriminators on the signal read, and on each of a plurality of distinct display locations there is dis-played each signal sequence presenting a complex of a type corres-ponding to said display location. The invention is more particularly applicable to the statistical processing such as the drawing up of a histogram of the pathological occurrences of an electrocardiogram signal.
The present invention relates to a process and device for processing and displaying an electrocardiogram signal read at a speed greater than the speed of recording, in which process a plu-rality of types of pathological complexes are selectively and simul-taneously detected with the aid of discriminators on the signal read, and on each of a plurality of distinct display locations there is dis-played each signal sequence presenting a complex of a type corres-ponding to said display location. The invention is more particularly applicable to the statistical processing such as the drawing up of a histogram of the pathological occurrences of an electrocardiogram signal.
Description
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The present invention relates to a method and an apparatus for processing and displaying a read-out signal from an electrocardiogram recording read at a speed greater than the speed of recording, An electrocardiogram is known to be a periodic curve of which each cycle or pattern normally presents three waves. The so-called HOI,TER investigation process consists in effecting on a patient a continuous electrocardiogram recording over a long period, for example over 24 hours. This recording is made on the magnetic tape of a cassette.
It is a particular object of the invention to provide a method and apparatus allowing a rapid and efficient utilization of this electrocardiogram recording with a view to establishing an accurate and reliable diagnosis.
According to one aspect of the invention, a method of processing and displaying an electrocardiogram signal that has been recorded at a first speed comprises the steps of: reading said recorded signal at a speed greater than the first speed of re-cording; selectively and simultaneously detecting the occurrence ~ 20 of a plurality of types of pathological complexes ~rom the read signal; and simultaneously displaying a signal sequence of said read signal for each detected pathological complex at respective different ones of a plurality of distinct display locations.
determined type of pathological complex is advantage-ously detected selectiveIy by measuring each period or duration . .
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of cycle of the electrocardiogram signal and/or by measuring the mean value of n consecutive periods, n being an integer greater than 1, and/or by comparing this period or this mean value with a reference value, and by detecting each period or mean value lower or higher than this reference value, and/or by detecting each series of p consecutive cycles of which the periods are lower - or higher - than this reference value, and/or ..
by comparing the period or the mean value with two reference values and by de`tecting each period of which the value is included -or not included - between these two reference values, and/or by calculating each difference between one period and the immediately preceding period and by comparing this difference with a reference value.
A pathological complex may also be detected by comparing the shape of each cycle with a reference shape by a shape re-cognition method.
According to another aspect of the invention, apparatus for processing and displaying an electrocardiogram signal that has been recorded at a first speed on a recording medium, comprises reading means for reading said recorded signal at a speed greater than the first speed of recording; delay means for delaying said read signal; a plurality of memory means, each receiving the delayed signal from said delay means; a plurality of discrimina-tor means, each adapted to detect the occurrence of a type of pathological complex in the read signal from said reading means and each~discriminator means controlling a respectlve one of said memory means to record a signal sequence of the delayed signal corresponding to a respective type of pathological complex upon the detection of said respective type of pathological complex;
and display means including a plurality of distinct display locations, each adapted to display a respective signal sequence recorded by a respective one of said memory means, whereby each display location is associated with a particular type of patho-logical complex.
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Thus, the selective display of certain, suitably chosen types o~ pathological complexes allows a rapid investigation of the electrocardiogram recording.
Moreover, this method allows the drawing up of exact statistics, allowing the operator to visually examine each cycle detected as pathological by the device, Thé invention will be more readily understood on reading the following description with reference to the accompanying drawings, in which:
Fig. 1 is an electrocardiogram tracing, and Fig. 2 is a diagram of a processing and display device according to an embodiment o~ the invention.
The device shown is designed selectively and simultaneously ; to detect a plurality, for example three different types of pathological complexes appearing in an electrocardiogram recorded over a long period, for example over Z4 hours, on a patient;
this device makes it possible -to display, simultaneously and on different parts of the screen, the sequences comprising these complèxes, each screen part being associated with a particular type of complex.
To this end, a cassette comprising an electrocardiogram ; recording on magnetic tape made over a long period of time, is ~ read at high speed in a cassette reader 1 of which the motor -~ la drives the tape at a speed about 100 times faster than the ; speed of recording of this tape.
`, `The output signal lb of the reader 1 is applied, after having been delayed in a delay device 2, on three main memories 3,4,5 simultaneously; this signal is also applied, 7 but without being delayed, on three discriminators 6,7,8 30 simultaneously. Each discriminator 6,7,8 is as$ociated with a main memory 3,4,5 ~espectively, of which the con-~ - 3 -',; - :
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tents are observed on a channel 9,10, 11 respectively of a di~play apparatus 12; the function of each discriminator 6, 7, 8 is to recog-ni~:e a particular type of pathological complex.
-- When a discriminator 6, 7, 8 detects the type of pathological 5 complex with which it is associated, it gives the r~emory 3, 4, 5 with which it is associated an order 13 for recording à sequence of the signal coming from the delay device 2. Three sequences of the read-out signal of the cassette are thus obtained simultaneously on the . screen of the display apparatus 12, each sequence appearing on a 10 particular part of the scre~3n, said part corresponding to the channel 9, lO, 11 associated therewith, each sequence - or ~ample of signal comprising a pathological comples~ of the particular type associated with said part of the screen.
.
:~: The display apparatus 12 allows the display of sequences of 15 length corresponding to a duration of read-out t of the reader l; th~
capacity of each memory 3, 4, 5 is equal to the data content of such a ~` length of sequence and the delay device 2 introduces in the signal ;~ coming from the reader l a delay t/2; this results in the pathological complex detected by a discriminator 6, 7, 8 and displayed on the screen 20 of the apparatus 12 being located in the middle of the sequence displayed on this screen :., .
According to a preferred embodiment of the invention, a first display channel 9 is reserved for the samples in which a considerable . variation is detected between two consecutive periods ~i of the electro-25 cardiogram signal lb; a second channel lO i9 reserved for the sarnples ` in which either a period ~i corresponding to an actual electrocardiogram - ~ period greater than two second$ is detected, or a pause, i. e. an ah-sence of signal, of actual duration greater than 2 seconds; a third channel ll is reserved for the samples in which a rhythm i9 d~ected, 30 corre~ponding to an actual rhythm greater than 150 patterns per minute ` .
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. or less than 45 patterns per minute; ancl a fourth channel 14 dis-.: plays the curve of the value of the periodY E~ as a function of time.:.`
To these ends, the discriminator 6 measures each period Pi of the signal by using the consecutive signals QRS, calculates : 5 ~ p = / Pi ~ Pi 1 /- compares .~ with a reference threshold value and transmits an order 13 to the memory 3 as soon as ~ exceeds this threshold; the discriminator 7 also.measures each period Pi and applies an order 13 to the memory 4 as soon as Pi > 2 secs.; the .;` discriminator 8 measures each period Pi ~ calculates the mean value 10 of n consecutive pi~s, n being an integer greater than 1, and applies .` to the memory 5 an order 13 as soon as this mean value corresponds to an actual value lower than 60/150th of a second or higher than 60/45th of a second; the discriminator 6 also permanently applies on :~, the channel 14 a signal representing the value of each period Pi which 15 it measures.
Alternately, or simultaneously, a discriminator 6, 7 or 8 may .. be designed to detect on the read-out signal lb supplied ~y the reader 1 a peak corresponding to the emission of an electric pulse coming from ~, ~ a cardiac . stimulation apparatus worn by the patient; the discriminator 20 6, 7 or 8 is then arranged to give an order 13 to the memory 3, 4 or 5 with which it is associated, in response to the detection of.said peak.
Alternately or sirnultaneously, a discriminator 6, 7 or 8 may be `: designed to compare the shapè of the patterns of the signal lb with a reference shape, corresponding to a s~ormal electrocardiogram. This 25 discriminator is arranged to apply to the mèmory 3, 4 or 5 associated therewith a signal 13 when the variation between the shape of a pattern of the signal lb~and the reference shape is greater than a predetermined .:~
value. This variation may for example be assessed quantitatively by `` measuring the area defined between the measured and reference tracings 30 of the patterns It is possible to limit this recognition of shape and this
The present invention relates to a method and an apparatus for processing and displaying a read-out signal from an electrocardiogram recording read at a speed greater than the speed of recording, An electrocardiogram is known to be a periodic curve of which each cycle or pattern normally presents three waves. The so-called HOI,TER investigation process consists in effecting on a patient a continuous electrocardiogram recording over a long period, for example over 24 hours. This recording is made on the magnetic tape of a cassette.
It is a particular object of the invention to provide a method and apparatus allowing a rapid and efficient utilization of this electrocardiogram recording with a view to establishing an accurate and reliable diagnosis.
According to one aspect of the invention, a method of processing and displaying an electrocardiogram signal that has been recorded at a first speed comprises the steps of: reading said recorded signal at a speed greater than the first speed of re-cording; selectively and simultaneously detecting the occurrence ~ 20 of a plurality of types of pathological complexes ~rom the read signal; and simultaneously displaying a signal sequence of said read signal for each detected pathological complex at respective different ones of a plurality of distinct display locations.
determined type of pathological complex is advantage-ously detected selectiveIy by measuring each period or duration . .
~6~
of cycle of the electrocardiogram signal and/or by measuring the mean value of n consecutive periods, n being an integer greater than 1, and/or by comparing this period or this mean value with a reference value, and by detecting each period or mean value lower or higher than this reference value, and/or by detecting each series of p consecutive cycles of which the periods are lower - or higher - than this reference value, and/or ..
by comparing the period or the mean value with two reference values and by de`tecting each period of which the value is included -or not included - between these two reference values, and/or by calculating each difference between one period and the immediately preceding period and by comparing this difference with a reference value.
A pathological complex may also be detected by comparing the shape of each cycle with a reference shape by a shape re-cognition method.
According to another aspect of the invention, apparatus for processing and displaying an electrocardiogram signal that has been recorded at a first speed on a recording medium, comprises reading means for reading said recorded signal at a speed greater than the first speed of recording; delay means for delaying said read signal; a plurality of memory means, each receiving the delayed signal from said delay means; a plurality of discrimina-tor means, each adapted to detect the occurrence of a type of pathological complex in the read signal from said reading means and each~discriminator means controlling a respectlve one of said memory means to record a signal sequence of the delayed signal corresponding to a respective type of pathological complex upon the detection of said respective type of pathological complex;
and display means including a plurality of distinct display locations, each adapted to display a respective signal sequence recorded by a respective one of said memory means, whereby each display location is associated with a particular type of patho-logical complex.
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Thus, the selective display of certain, suitably chosen types o~ pathological complexes allows a rapid investigation of the electrocardiogram recording.
Moreover, this method allows the drawing up of exact statistics, allowing the operator to visually examine each cycle detected as pathological by the device, Thé invention will be more readily understood on reading the following description with reference to the accompanying drawings, in which:
Fig. 1 is an electrocardiogram tracing, and Fig. 2 is a diagram of a processing and display device according to an embodiment o~ the invention.
The device shown is designed selectively and simultaneously ; to detect a plurality, for example three different types of pathological complexes appearing in an electrocardiogram recorded over a long period, for example over Z4 hours, on a patient;
this device makes it possible -to display, simultaneously and on different parts of the screen, the sequences comprising these complèxes, each screen part being associated with a particular type of complex.
To this end, a cassette comprising an electrocardiogram ; recording on magnetic tape made over a long period of time, is ~ read at high speed in a cassette reader 1 of which the motor -~ la drives the tape at a speed about 100 times faster than the ; speed of recording of this tape.
`, `The output signal lb of the reader 1 is applied, after having been delayed in a delay device 2, on three main memories 3,4,5 simultaneously; this signal is also applied, 7 but without being delayed, on three discriminators 6,7,8 30 simultaneously. Each discriminator 6,7,8 is as$ociated with a main memory 3,4,5 ~espectively, of which the con-~ - 3 -',; - :
.
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tents are observed on a channel 9,10, 11 respectively of a di~play apparatus 12; the function of each discriminator 6, 7, 8 is to recog-ni~:e a particular type of pathological complex.
-- When a discriminator 6, 7, 8 detects the type of pathological 5 complex with which it is associated, it gives the r~emory 3, 4, 5 with which it is associated an order 13 for recording à sequence of the signal coming from the delay device 2. Three sequences of the read-out signal of the cassette are thus obtained simultaneously on the . screen of the display apparatus 12, each sequence appearing on a 10 particular part of the scre~3n, said part corresponding to the channel 9, lO, 11 associated therewith, each sequence - or ~ample of signal comprising a pathological comples~ of the particular type associated with said part of the screen.
.
:~: The display apparatus 12 allows the display of sequences of 15 length corresponding to a duration of read-out t of the reader l; th~
capacity of each memory 3, 4, 5 is equal to the data content of such a ~` length of sequence and the delay device 2 introduces in the signal ;~ coming from the reader l a delay t/2; this results in the pathological complex detected by a discriminator 6, 7, 8 and displayed on the screen 20 of the apparatus 12 being located in the middle of the sequence displayed on this screen :., .
According to a preferred embodiment of the invention, a first display channel 9 is reserved for the samples in which a considerable . variation is detected between two consecutive periods ~i of the electro-25 cardiogram signal lb; a second channel lO i9 reserved for the sarnples ` in which either a period ~i corresponding to an actual electrocardiogram - ~ period greater than two second$ is detected, or a pause, i. e. an ah-sence of signal, of actual duration greater than 2 seconds; a third channel ll is reserved for the samples in which a rhythm i9 d~ected, 30 corre~ponding to an actual rhythm greater than 150 patterns per minute ` .
" ~ "
. or less than 45 patterns per minute; ancl a fourth channel 14 dis-.: plays the curve of the value of the periodY E~ as a function of time.:.`
To these ends, the discriminator 6 measures each period Pi of the signal by using the consecutive signals QRS, calculates : 5 ~ p = / Pi ~ Pi 1 /- compares .~ with a reference threshold value and transmits an order 13 to the memory 3 as soon as ~ exceeds this threshold; the discriminator 7 also.measures each period Pi and applies an order 13 to the memory 4 as soon as Pi > 2 secs.; the .;` discriminator 8 measures each period Pi ~ calculates the mean value 10 of n consecutive pi~s, n being an integer greater than 1, and applies .` to the memory 5 an order 13 as soon as this mean value corresponds to an actual value lower than 60/150th of a second or higher than 60/45th of a second; the discriminator 6 also permanently applies on :~, the channel 14 a signal representing the value of each period Pi which 15 it measures.
Alternately, or simultaneously, a discriminator 6, 7 or 8 may .. be designed to detect on the read-out signal lb supplied ~y the reader 1 a peak corresponding to the emission of an electric pulse coming from ~, ~ a cardiac . stimulation apparatus worn by the patient; the discriminator 20 6, 7 or 8 is then arranged to give an order 13 to the memory 3, 4 or 5 with which it is associated, in response to the detection of.said peak.
Alternately or sirnultaneously, a discriminator 6, 7 or 8 may be `: designed to compare the shapè of the patterns of the signal lb with a reference shape, corresponding to a s~ormal electrocardiogram. This 25 discriminator is arranged to apply to the mèmory 3, 4 or 5 associated therewith a signal 13 when the variation between the shape of a pattern of the signal lb~and the reference shape is greater than a predetermined .:~
value. This variation may for example be assessed quantitatively by `` measuring the area defined between the measured and reference tracings 30 of the patterns It is possible to limit this recognition of shape and this
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measurement of variation by the discriminator to the wave QRS and/or to wave P a~d/or to wave T of the pattern.
~.
Of course, each discriminator 6, 7 or 8 may be provided both with means for recogniY.ing shape and with means for measuring the 5 periods and comparing these periods in actual or mean value, with a reference value; i~ is thus possible to select a pathological complex characterised both by an abnormal value of the period and by an ab normal shape of the cycle, for example a wid~ing of the signal QRS.
The display apparatus 12 is arranged so that the recording of ` each sequence remains stable on the screen and disappears only upon the appearance on the signal lb of a new pathological occurrence - or . complex - of the same type, to be replaced by the corresponding new sequence. Centering means are provided so that the wave QRS of the 15 pattern presenting an abnormality is located at the same place on the ~ screen .' ~.
` The operator may, of course, stop the advance of the magnetic tape in the reader 1 at any moment, in order to examine a sequence more fully and/or to record it on paper.
According to an embodiment of the invention, a discriminator, for example discriminator 6, is designed to supply an order 14to the motor la to stop when it detects a strongly pathological complex such as a highly abnormal widoning of the signal QRS or an abnormally short period Pi or a succession of very short periods Pi (salvo of 25 extrasystclles) The operator may at this moment give - or not give ~
,` a computer 16 e~ploiting the signal lb, an enabling order 17 allowing `~ the computer 16 to take into account - or not to take into account - this pathological occurrence for a ~tatistical processing such as a histogram.
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Instead of a di~?lay apparatus having a plurality of channels, an 3û apparatus having only one channel may be used, provided with a sui--.~
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.~ table device for allowing the display of the contents of the memories `.~ 3~ 4~ 5 in different screen locations; for example, the different con-tents may be successively received on the display apparatus and a continuous signal of different level may be added to the signal co~ning 5 from each memory 3, 4, 5.
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measurement of variation by the discriminator to the wave QRS and/or to wave P a~d/or to wave T of the pattern.
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Of course, each discriminator 6, 7 or 8 may be provided both with means for recogniY.ing shape and with means for measuring the 5 periods and comparing these periods in actual or mean value, with a reference value; i~ is thus possible to select a pathological complex characterised both by an abnormal value of the period and by an ab normal shape of the cycle, for example a wid~ing of the signal QRS.
The display apparatus 12 is arranged so that the recording of ` each sequence remains stable on the screen and disappears only upon the appearance on the signal lb of a new pathological occurrence - or . complex - of the same type, to be replaced by the corresponding new sequence. Centering means are provided so that the wave QRS of the 15 pattern presenting an abnormality is located at the same place on the ~ screen .' ~.
` The operator may, of course, stop the advance of the magnetic tape in the reader 1 at any moment, in order to examine a sequence more fully and/or to record it on paper.
According to an embodiment of the invention, a discriminator, for example discriminator 6, is designed to supply an order 14to the motor la to stop when it detects a strongly pathological complex such as a highly abnormal widoning of the signal QRS or an abnormally short period Pi or a succession of very short periods Pi (salvo of 25 extrasystclles) The operator may at this moment give - or not give ~
,` a computer 16 e~ploiting the signal lb, an enabling order 17 allowing `~ the computer 16 to take into account - or not to take into account - this pathological occurrence for a ~tatistical processing such as a histogram.
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Instead of a di~?lay apparatus having a plurality of channels, an 3û apparatus having only one channel may be used, provided with a sui--.~
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. -7 -:.
.~ table device for allowing the display of the contents of the memories `.~ 3~ 4~ 5 in different screen locations; for example, the different con-tents may be successively received on the display apparatus and a continuous signal of different level may be added to the signal co~ning 5 from each memory 3, 4, 5.
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Claims (10)
1. A method of processing and displaying an electrocardiogram signal that has been recorded at a first speed, comprising the steps of:
reading said recorded signal at a speed greater than the first speed of recording;
selectively and simultaneously detecting the occurrence of a plurality of types of pathological complexes from the read signal; and simultaneously displaying a signal sequence of said read signal for each detected pathological complex at respective different ones of a plurality of distinct display locations.
reading said recorded signal at a speed greater than the first speed of recording;
selectively and simultaneously detecting the occurrence of a plurality of types of pathological complexes from the read signal; and simultaneously displaying a signal sequence of said read signal for each detected pathological complex at respective different ones of a plurality of distinct display locations.
2. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal and comparing each said measured period with a reference value.
3, A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal and determining whether each measured period is included in a range between two reference values.
4. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal, calculating the difference between each measured period and the immediately preceding period and comparing each difference with a reference value.
5. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal, calculating a mean value for each n consecutive measured periods, n being an integer greater than 1, and comparing each mean value with a reference value.
6. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal, calculating a mean value for each n consecutive measured periods, n being an integer greater than 1, and determining whether each value is included in a range between two reference values.
7. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by measuring each period of the read signal, comparing each measured period with a reference value and detecting each series of p consecutive cycles of the read signal in which the measured periods are one of lower and higher than said reference value, p being an integer greater than 1.
8. A method according to claim 1, wherein the step of selectively and simultaneously detecting selectively detects the occurrence of a particular type of pathological complex by comparing the shape of each cycle of the read signal with a reference shape.
9. Apparatus for processing and displaying an electro-cardiogram signal that has been recorded at a first speed on a recording medium, comprising:
reading means for reading said recorded signal at a speed greater than the first speed of recording;
delay means for delaying said read signal;
a plurality of memory means, each receiving the delayed signal from said delay means;
a plurality of discriminator means, each adapted to detect the occurrence of a type of pathological complex in the read signal from said reading means and each discriminator means controlling a respective one of said memory means to record a signal sequence of the delayed signal corresponding to a respective type of pathological complex upon the detection of said respective type of pathological complex; and display means including a plurality of distinct display locations, each adapted to display a respective signal sequence recorded by a respective one of said memory means, whereby each display location is associated with a particular type of pathological complex.
reading means for reading said recorded signal at a speed greater than the first speed of recording;
delay means for delaying said read signal;
a plurality of memory means, each receiving the delayed signal from said delay means;
a plurality of discriminator means, each adapted to detect the occurrence of a type of pathological complex in the read signal from said reading means and each discriminator means controlling a respective one of said memory means to record a signal sequence of the delayed signal corresponding to a respective type of pathological complex upon the detection of said respective type of pathological complex; and display means including a plurality of distinct display locations, each adapted to display a respective signal sequence recorded by a respective one of said memory means, whereby each display location is associated with a particular type of pathological complex.
10. Apparatus according to claim 9, wherein said recording medium is a magnetic tape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR78,14293 | 1978-05-12 | ||
| FR7814293A FR2425231A1 (en) | 1978-05-12 | 1978-05-12 | PROCESS AND DEVICE FOR PROCESSING AND DISPLAYING A READING SIGNAL OF AN ELECTROCARDIOGRAM RECORDING READ AT A SPEED HIGHER THAN THE RECORDING SPEED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116244A true CA1116244A (en) | 1982-01-12 |
Family
ID=9208236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA327,291A Expired CA1116244A (en) | 1978-05-12 | 1979-05-09 | Process and device for processing and displaying a read-out signal from an electrocardiogram recording read at a speed greater than the speed of recording |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4275742A (en) |
| JP (1) | JPS54150884A (en) |
| AU (1) | AU524412B2 (en) |
| BE (1) | BE876182A (en) |
| CA (1) | CA1116244A (en) |
| DE (1) | DE2919108A1 (en) |
| FR (1) | FR2425231A1 (en) |
| GB (1) | GB2021778B (en) |
| IT (1) | IT1118665B (en) |
| SE (1) | SE441567B (en) |
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| DE2916067C2 (en) * | 1979-04-20 | 1983-11-24 | Siemens AG, 1000 Berlin und 8000 München | Device for evaluating physiological signals which are essentially periodic |
| US4259966A (en) * | 1979-08-22 | 1981-04-07 | American Optical Corporation | Heart rate analyzer |
| US4523595A (en) * | 1981-11-25 | 1985-06-18 | Zibell J Scott | Method and apparatus for automatic detection and treatment of ventricular fibrillation |
| US4862897A (en) * | 1985-11-05 | 1989-09-05 | Sound Enhancement Systems, Inc. | Electrocardiogram enhancement system and method |
| US5357968A (en) * | 1991-03-25 | 1994-10-25 | Lerner Albert M | Diagnosing and treating subacute myocarditis |
| US5464020A (en) * | 1991-03-25 | 1995-11-07 | Lerner; Albert M. | Diagnosing and treating subacute cardiac dysfunction |
| US5213106A (en) * | 1991-03-25 | 1993-05-25 | Lerner Albert M | Diagnosing and treating chronic fatigue syndrome by electrocardiographic monitoring of T-waves |
| JP2534424Y2 (en) * | 1991-03-28 | 1997-04-30 | 富士写真光機株式会社 | Storage case for endoscope |
| US5967994A (en) * | 1998-03-26 | 1999-10-19 | Hewlett-Packard Company | Method and system for characterizing the quality of signals indicative of heart function |
| US7502498B2 (en) | 2004-09-10 | 2009-03-10 | Available For Licensing | Patient monitoring apparatus |
| US9820658B2 (en) | 2006-06-30 | 2017-11-21 | Bao Q. Tran | Systems and methods for providing interoperability among healthcare devices |
| US7733224B2 (en) | 2006-06-30 | 2010-06-08 | Bao Tran | Mesh network personal emergency response appliance |
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| US7539533B2 (en) | 2006-05-16 | 2009-05-26 | Bao Tran | Mesh network monitoring appliance |
| US7884727B2 (en) | 2007-05-24 | 2011-02-08 | Bao Tran | Wireless occupancy and day-light sensing |
| US20140100238A1 (en) | 2012-10-04 | 2014-04-10 | Ohio State University | Method of diagnosing and treating epstein barr virus-based myalgic encephalomyelitis chronic fatigue syndrome patients |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3442264A (en) * | 1964-06-04 | 1969-05-06 | Joseph R Levitt | Data processing method and means |
| JPS4944513B1 (en) * | 1968-05-20 | 1974-11-28 | ||
| US3599033A (en) * | 1969-09-22 | 1971-08-10 | Hewlett Packard Co | System for simultaneous display of ecg and heart rate |
| US3616790A (en) * | 1970-01-21 | 1971-11-02 | American Optical Corp | Multiform ventricular premature beat detector |
| US3779237A (en) * | 1971-04-13 | 1973-12-18 | Electrocardio Dynamics Inc | Method and system for automatic processing of physiological information in greater than real time |
| GB1443705A (en) * | 1972-12-15 | 1976-07-21 | Int Research & Dev Co Ltd | Rock drills |
| US3853119A (en) * | 1973-10-19 | 1974-12-10 | Clincal Data Services Inc | Method and system for display of electrocardiographic (ecg) signals |
| US3874370A (en) * | 1974-04-15 | 1975-04-01 | American Optical Corp | Electrocardiographic waveform analyzer |
| US4022192A (en) * | 1974-10-21 | 1977-05-10 | Laukien Gunther R | Apparatus for measuring the frequency of cardiac pulses |
| US4041468A (en) * | 1976-10-07 | 1977-08-09 | Pfizer Inc. | Method and system for analysis of ambulatory electrocardiographic tape recordings |
| US4181135A (en) * | 1978-03-03 | 1980-01-01 | American Optical Corporation | Method and apparatus for monitoring electrocardiographic waveforms |
-
1978
- 1978-05-12 FR FR7814293A patent/FR2425231A1/en active Granted
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1979
- 1979-05-08 US US06/036,986 patent/US4275742A/en not_active Expired - Lifetime
- 1979-05-09 GB GB7915974A patent/GB2021778B/en not_active Expired
- 1979-05-09 CA CA327,291A patent/CA1116244A/en not_active Expired
- 1979-05-11 BE BE2/57787A patent/BE876182A/en not_active IP Right Cessation
- 1979-05-11 JP JP5718679A patent/JPS54150884A/en active Pending
- 1979-05-11 DE DE19792919108 patent/DE2919108A1/en not_active Ceased
- 1979-05-11 SE SE7904158A patent/SE441567B/en not_active IP Right Cessation
- 1979-05-11 IT IT68005/79A patent/IT1118665B/en active
- 1979-05-11 AU AU46992/79A patent/AU524412B2/en not_active Ceased
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|---|---|
| GB2021778B (en) | 1983-01-12 |
| BE876182A (en) | 1979-11-12 |
| JPS54150884A (en) | 1979-11-27 |
| IT1118665B (en) | 1986-03-03 |
| AU4699279A (en) | 1979-11-15 |
| SE441567B (en) | 1985-10-21 |
| US4275742A (en) | 1981-06-30 |
| SE7904158L (en) | 1979-11-13 |
| FR2425231A1 (en) | 1979-12-07 |
| AU524412B2 (en) | 1982-09-16 |
| IT7968005A0 (en) | 1979-05-11 |
| GB2021778A (en) | 1979-12-05 |
| DE2919108A1 (en) | 1979-11-15 |
| FR2425231B1 (en) | 1980-12-12 |
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