US3658055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic arrhythmia diagnosing system
Assignee: Hitachi Ltd
•
Filing: 1969-04-11
•
Granted: 1972-04-25
•
Expires: 1989-04-11
Abstract
Abstract An automatic arrythmia diagnosing system for diagnosing heart disease employs a plurality of detector elements for detecting both the components and the time interval between components of the portions of an electrocardiagraph wave. The values of cardiac potentials which are detected during one cardiac cycle are compared with those of a later cardiac cycle when the frequency of the presence of the arrhythmia is high. The number of cardiac potentials of a cardiac cycle is averaged over a predetermined number during an earlier cardiac cycle when the frequency of the presence of arrhythmia is low. Digital logic circuitry is employed to be responsive to code signals representative of various portions of the electrocardiagraph signal to produce signals indicative of different forms of heart disease.
Inventors
- 👤 Zenmon Abe
- 👤 Takaji Suzuki
- 👤 Masayuki Tsuneoka
- 👤 Eiichi Kimura
- 👤 Teizo Akazome
- 👤 Kanji Obayashi
- 👤 Gengo Kasai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:11
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/346; A61B5/349; A61B5/364
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
153 words
An automatic arrhythmia diagnosing systeM for determining characteristics of a cardiographic signal which includes P-, Q-, R-, S-, and T-wave portions comprising: first means for detecting each of said wave portions of said cardiographic signals; second means, responsive to said first means, for measuring the width of a QRS wave, the interval between the P-wave and a Qwave, the number of P-waves, the polarities of the P-waves from each of said first and second cardiac cycles of a test subject and the interval between respective R- and P-waves of a first and second cardiac cycle; third means, responsive to said measuring means, for producing a plurality of measurement signals representative of said wave measurements indicative of clinical diagnostic characteristics of a heart disease, and fourth means, responsive to said measurement signal producing means, for logically combining said plurality of signals in accordance with specific relationships corresponding to symptoms of a predetermined heart disease.
Claim 2
Dependent Claim
153 words
An automatic arrhythmia diagnosing systeM for determining characteristics of a cardiographic signal which includes P-, Q-, R-, S-, and T-wave portions comprising: first means for detecting each of said wave portions of said cardiographic signals; second means, responsive to said first means, for measuring the width of a QRS wave, the interval between the P-wave and a Qwave, the number of P-waves, the polarities of the P-waves from each of said first and second cardiac cycles of a test subject and the interval between respective R- and P-waves of a first and second cardiac cycle; third means, responsive to said measuring means, for producing a plurality of measurement signals representative of said wave measurements indicative of clinical diagnostic characteristics of a heart disease, and fourth means, responsive to said measurement signal producing means, for logically combining said plurality of signals in accordance with specific relationships corresponding to symptoms of a predetermined heart disease.
Claim 3
Dependent Claim
203 words
An automatic arrhythmia diagnosing system according to claim 1, further comprising seventh means, responsive to said first means, for converting said wave portions into respective rectangular waves and eighth means, responsive to said second and said seventh means, for generating a signal corresponding to said interval between P-waves including a first monostable multivibrator circuit for generating a pulse output having a duration of approximately 100 msec. and being triggered by the first rise part of the rectangular waves representative of a P-wave of a cardiac potential, a second multivibrator, triggered by the pulse output of said first multivibrator, producing a plurality of pulse outputs, a sample holding circuit supplied with one of the pulse outputs from said second monostable multivibrator as a control signal, a third monostable multivibrator triggered by the other of said pulse outputs from said second monostable multivibrator, and a voltage generator reset by a pulse output of said third monostable multivibrator, said sample holding circuit being controlled by said one of said pulse outputs from said second monostable multivibrator to sample and hold the output voltage from said voltage generator, said voltage generator being instantaneously reset by said pulse output of said third monostable multivibrator to resume its operation.
Claim 4
Dependent Claim
171 words
An automatic arrhythmia diagnosing system according to claim 1, comprising seventh means responsive to said first means for converting said wave portions into respective rectangular waves and ninth means responsive to said second and seventh means for generating a signal corresponding to said interval between said P- and Q-waves including a first monostable multivibrator circuit for generating a pulse output having a duration of approximately 100 msec. and triggered by the first rise pulse of the rectangular waves representative of a P-wave of a cardiac potential, a second multivibrator triggered by the pulse output from said first monostable multivibrator, a voltage generator reset by an output from said second monostable multivibrator to momentarily interrupt and then resume its operation, a third monostable multivibrator triggered by the rise part of a rectangular wave representative of the part from said Q-wave to said T-wave of a cardiac potential, and a sampling and holding circuit for sampling and holding the output of said voltage generator controlled by an output of said third monostable multivibrator.
Claim 5
Dependent Claim
166 words
An automatic arrhythmia diagnosing system according to claim 1, comprising seventh means responsive to said first means for converting said wave portions into respective rectangular waves and tenth means responsive to said second and seventh means for generating a signal corresponding to said interval between said R-waves including a first monostable multivibrator triggered by a rectangular signal representative of an R-wave of cardiac potential producing a pair of outputs, a second Monostable multivibrator triggered by one of the outputs of said first monostable multivibrator, a voltage generator instantaneously reset by an output of said second monostable multivibrator to resume its operation, a sampling and holding circuit for sampling and holding the output of said voltage generator controlled by the other of said outputs of said first monostable multivibrator and a comparator for receiving as its two inputs the output of said sampling and holding circuit and the outputs of said voltage generator, said comparator generating a voltage when its two inputs are equal to each other.
Claim 6
Dependent Claim
66 words
A system in accordance with claim 1, further comprising fifth means, responsive to said first means, for determining a predetermined number of cardiac cycles, having a basic rhythm, and further comprising sixth means responsive to said second means for generating signals representative of the mean values of the width of the QRS wave, the interval between the P- and Q-waves, and the interval of the R-waves.
Claim 7
Dependent Claim
221 words
An automatic arrhythmia diagnosing system according to claim 5, comprising means for detecting said basic rhythm from cardiac cycles of said test subject including a shift register having a predetermined number of stages for receiving as an input signal a normal cardiac cycle having one P-wave and one QRS wave the width of which is equal to that of a preceding cardiac cycle in a predetermined number of cardiac cycles of said test subject, a plurality of first OR circuits each for receiving as its input signals outputs from predetermined stages of said shift register, a plurality of first counters for counting a predetermined number of output signals from each of said first OR circuits, a counter OR circuit for receiving all outputs from said first counters, a second counter for counting said predetermined number of cardiac cycles of said test subject, and a first appearing pulse discriminator for discriminating one from the other of the output signal from said second counter and the output signal from said counter OR circuit, said shift register successively generating output signals within the time interval between R-waves predetermined by the number of stages and the feed time of said shift register, each of said first OR circuits receiving a part of the input signals of the immediately preceding one of said first OR circuits.
Claim 8
Dependent Claim
198 words
An automatic arrhythmia diagnosing system according to claim 6, wherein said first appearing pulse discriminator comprises a first AND circuit having an inhibit terminal and an input terminal, a first flip-flop circuit connected with said first AND circuit, a second AND circuit having an inhibit terminal and an input terminal, and a second flip-flop circuit connected with said second AND circuit, said first flip-flop circuit generating an output when an output from said counter OR circuit is applied to said input terminal of said first AND circuit, a part of said output from said first flip-flop circuit being derived from an output terminal thereof, the remaining part of said output from said first flip-flop circuit entering said inhibit terminal of said second AND circuit to inhibit said second AND circuit, said second flip-flop circuit generating an output when an output from said second counter is applied to said input terminal of said second AND circuit, a part of said output from said second flip-flop circuit being derived from an output terminal thereof, the remaining part of said output from said second flip-flop circuit entering said inhibit terminal of said first AND circuit to inhibit said first AND circuit.
Claim 9
Dependent Claim
137 words
A system in accordance with claim 6, wherein said mean value signal generating means comprises an adder circuit having a pair of inputs, one of which receives signals indicative of the width of said QRS waves, a pair of sample hold circuits connected in series and being supplied the output of said adder circuit, a divider circuit connected to the output of said sEries connected sample hold circuits, a feedback circuit connected as one input of said adder circuit from the output of said series connected sample hold circuit, a controlled input for each of said sample hold circuits, one of which is connected to a control input terminal means, for supplying a control input signal to said control input terminal, and the other of which is connected to said control input terminal through an inverter circuit.
Claim 10
Dependent Claim
53 words
A system in accordance with claim 8, further including a plurality of analog gates, respectively connected to the outputs of said mean value signal generating means and responsive to the output of said plurality of first counters for obtaining a mean value QRS duration, a mean PQ interval and a means PR interval.
Claim 11
Dependent Claim
125 words
A system in accordance with claim 1, wherein said logically combining means comprises first logic means for generating a first plurality of code signals, including a plurality of divider circuits receiving RR integral signals, a plurality of comparator circuits corresponding in number to the number of divider circuits, and being connected in series therewith and receiving at one respective input the output of the respective divider circuit and another respective input a preselected RR interval signal, a set of logical AND gates connected to the outputs of said comparator circuits and to a control input therefor for receiving a gate energizing signal, and a plurality of logic storage circuits connected to the outputs of said AND gates for registering a first set of code signals.
Claim 12
Dependent Claim
124 words
A system in accordance with claim 10, wherein said logically combining means further comprises second logic means for generating second code signals representative of a second set of diagnostic characteristics, said second logic circuit means comprising a pair of comparator circuits for comparing a plurality of PQ interval signals, a pair of interter circuits, receiving the outputs of said comparator circuits, a storage flip-flop being logically connected to said comparator circuits and means for logically connecting said inverter circuits to said storage flip-flop and for connecting the outputs of said comparator circuits to said storage flip-flop, comprising a set of second logic AND gates, the control inputs of which are connected to a means for supplying said control inputs with a common control signal.
Claim 13
Dependent Claim
129 words
A system in accordance with claim 11, further comprising means for combining the outputs of said first and second logic means, comprising a first plurality of OR gates and a set of combining AND gates connected in series therewith, an output AND gate for receiving the outputs of said combining AND gates, said output AND gate further including a control input and a means for supplying a pulse to energize said control input and delayed storage input and further comprising a storage flip-flop connected to one of said combining AND gates and a delay circuit connected in series therewith for supplying said delayed storage input, and a combining output logic storage flip-flop connected to said output AND gates for delivering an output signal whereby atrio-ventricular block can be diagnosed.
Claim 14
Dependent Claim
129 words
A system in accordance with claim 1, including coding means responsive to said first means for generating coded signals representative of coded portions of said cardiac wave signal and wherein said logically combining means comprises a plurality of shift register means, connected to said coding means to receive a plurality of signals representative of coded portions of said cardiac wave signal, a triggering multivibrator, connected in parallel to the inputs of each of said shift registers, a first plurality of shift register output gates connected to each respective shift register, and a combining output shift register AND gate connected to each of the outputs of each of said shift register output gates, and an output register flip-flop, for providing a signal indicative of the presence of bigeminy ventRicular extrasystole.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |