EP0711531B1
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EP
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Myocardial ischemia and infarction analysis and monitoring system
Assignee: Ortivus Medical AB
•
Filing: 1995-10-05
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Granted: 2004-06-09
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Expires: 2015-10-05
Abstract
No abstract record available.
Inventors
- 👤 Per Karlsson
- 👤 Gunilla Lundahl
- 👤 Michael Oljemark
- 👤 Johan Ubby
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
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: 22
Claim 1
Independent Claim
279 words
An apparatus for use in monitoring and analysis of myocardial
ischemia and infarction comprising: input means for receiving a number of ECG signals relating to the
heartbeat of at least one patient; converter means for converting the received number of ECG signals into
three perpendicular ECG signals corresponding to the three perpendicular leads of the Frank vectorcardiogram at regular predetermined intervals, calculating means for calculating a plurality of parameters related to the
ischemic condition of each patient from said three perpendicular ECG signals; signal generator means for generating electric signals representative of
the value of said plurality of parameters related to the ischemic condition of
each patient; storage means for storing said electric signals representative of the value
of said plurality of parameters related to the ischemic condition of each patient
in the memory; characterised by detecting means for detecting, for each occasion that a number of ECG
signals are received, whether or not the three perpendicular ECG signals
correspond to a preselected heartbeat which serves as a template; signal quality means to determine, for each occasion that a number of
ECG signals are received, whether or not the signal quality of the three
perpendicular ECG signals exceeds a minimum level; and heartbeat detecting means for detecting an average heartbeat from only
those three perpendicular ECG signals which correspond to the preselected heartbeat
and for which the signal quality has been found to exceed the minimum level;
and control means for regularly repeating the steps of determining said
average heartbeat, calculating said plurality of parameters, generating electric
signals and storing said electric signals for as long as ECG signals continue to
be received or until the memory is full.
Claim 2
Dependent Claim
36 words
An apparatus as claimed in claim 1, further comprising
presentation means for presenting said plurality of parameters in trend graphs
having time along the horizontal axis and the value of the parameter along the
vertical axis.
Claim 3
Dependent Claim
27 words
An apparatus as claimed in claim 1 or 2, comprising further
storage means for storing the average heartbeat in the form of said three
perpendicular ECG signals.
Claim 4
Independent Claim
46 words
An apparatus as claimed in any preceding claim, further
comprising: recording means for continuously recording said three perpendicular
ECG signals; and further calculating means for calculating a second number of ECG
signals from said three perpendicular ECG signals in response to a request by
a user.
Claim 5
Independent Claim
26 words
An apparatus as claimed in any preceding claim, further
comprising display means for displaying said second number of ECG signals
in response to a user request.
Claim 6
Dependent Claim
16 words
An apparatus as claimed in claim 5, wherein said second number
of ECG signals is twelve.
Claim 7
Independent Claim
23 words
An apparatus as claimed in any preceding claim, wherein at least
one of said plurality of parameters is an ST vector magnitude parameter.
Claim 8
Independent Claim
23 words
An apparatus as claimed in any preceding claim, wherein at least
one of said plurality of parameters is an STC vector magnitude parameter.
Claim 9
Independent Claim
23 words
An apparatus as claimed in any preceding claim, wherein at least
one of said plurality of parameters is a QRS vector difference parameter.
Claim 10
Independent Claim
125 words
An apparatus as claimed in any preceding claim, further
comprising: another storage means for storing those three perpendicular ECG signals
determined to correspond to the preselected heartbeat; wherein said average heartbeat determining means for determining an
average heartbeat determines an average heartbeat repeatedly at the end of
each interval in which a number of three perpendicular ECG signals
corresponding to the preselected heartbeat is received at least a predetermined
number of times and includes said number of three perpendicular ECG signals
corresponding to the preselected heartbeat received during said interval, and wherein said calculating means for calculating said plurality of
parameters calculates said plurality of parameters and said generating means
for generating electric signals generates said electric signals using the most
recently determined average heartbeat.
Claim 11
Independent Claim
97 words
An apparatus as claimed in any preceding claim, further
comprising: display means for displaying at least one of said plurality of parameters
for each patient on a respective patient monitor substantially in real time; receiving and storage means for receiving and storing data from each
patient monitor at a central location, said data including said at least one of
said plurality of parameters; further display means for displaying said at least one of said plurality of
parameters received from each patient monitor, and printing means for printing information relating to said data received
from each patient monitor.
Claim 12
Dependent Claim
272 words
A myocardial ischemia and infarction analysis and monitoring
system comprising: input means for receiving a number of ECG signals relating to the
heartbeat of at least one patient; converter means for converting the received number of ECG signals into
three perpendicular ECG signals corresponding to the three perpendicular leads of the Frank vectorcardiogram at regular predetermined intervals, calculating means for calculating a plurality of parameters related to the
ischemic condition of each patient from said three perpendicular ECG signals; signal generator means for generating electric signals representative of
the value of said plurality of parameters related to the ischemic condition of
each patient; storage means for storing said electric signals representative of the value
of said plurality of parameters related to the ischemic condition of each patient
in the memory; characterised by determining means for determining, for each occasion
that a number of ECG signals is received, whether or not the three
perpendicular ECG signals correspond to a preselected heartbeat, which serves as a template signal quality determining means for determining, for each occasion that
a number of ECG signals is received, whether or not the signal quality of the
three perpendicular ECG signals exceeds a minimum level; average heartbeat determining means for determining an average
heartbeat from only those three perpendicular ECG signals which correspond
to the preselected heartbeat and for which the signal quality exceeds the minimum
level; and control means for regularly repeating the steps of determining said
average heartbeat, calculating said plurality of parameters, generating electric
signals and storing said electric signals for as long as ECG signals continue to
be received or until the memory is full.
Claim 13
Dependent Claim
36 words
A system as claimed in claim 12, further comprising presentation
means for presenting said plurality of parameters in trend graphs having time
along the horizontal axis and the value of the parameter along the vertical
axis.
Claim 14
Dependent Claim
27 words
A system as claimed in claim 12 or 13, comprising further storage
means for storing the average heartbeat in the form of said three perpendicular
ECG signals.
Claim 15
Dependent Claim
48 words
A system as claimed in claim 12, 13 or 14 further comprising: recording means for continuously recording said three perpendicular
ECG signals; and further calculating means for calculating a second number of ECG
signals from said three perpendicular ECG signals in response to a request by
a user.
Claim 16
Independent Claim
30 words
A system as claimed in any one of claims 12 to 15, further
comprising display means for displaying said second number of ECG signals
in response to a user request
Claim 17
Dependent Claim
16 words
A system as claimed in claim 16, wherein said second number of
ECG signals is twelve.
Claim 18
Independent Claim
27 words
A system as claimed in any one of claims 12 to 17, wherein at
least one of said plurality of parameters is a ST vector magnitude parameter.
Claim 19
Independent Claim
27 words
A system as claimed in any one of claims 12 to 17, wherein at
least one of said plurality of parameters is a STC vector magnitude
parameter.
Claim 20
Independent Claim
27 words
A system as claimed in any one of claims 12 to 17, wherein at
least one of said plurality of parameters is a QRS vector difference parameter.
Claim 21
Independent Claim
128 words
A system as claimed in any of claims 12 to 20, further comprising: another storage means for storing those three perpendicular ECG signals
determined to correspond to the preselected heartbeat; wherein said average heartbeat determining means for determining an
average heartbeat determines an average heartbeat repeatedly at the end of
each interval in which a number of three perpendicular ECG signals
corresponding to the preselected heartbeat is received at least a predetermined
number of times and includes said number of three perpendicular ECG signals
corresponding to the preselected heartbeat received during said interval, and wherein said calculating means for calculating said plurality of
parameters calculates said plurality of parameters and said generating means
for generating electric signals generates said electric signals using the most
recently determined average heartbeat.
Claim 22
Independent Claim
100 words
A system as claimed in any of claims 12 to 21, further comprising: display means for displaying at least one of said plurality of parameters
for each patient on a respective patient monitor substantially in real time; receiving and storage means for receiving and storing data from each
patient monitor at a central location, said data including said at least one of
said plurality of parameters; further display means for displaying said at least one of said plurality of
parameters received from each patient monitor, and printing means for printing information relating to said data received
from each patient monitor.
References Cited (Backward Citations)
No citation records indexed.
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