US 7,925,337 B2Granted

Systems and methods for graphic display of ST-segment deviation

AssigneeMindray DS USA, Inc.

InventorsCadathur Rajagopalan, Scott Eaton, Joe Petruzzelli, Jack Balji

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Abstract

Systems and methods are provided for monitoring a patient and graphically representing ST-segment deviations. A receiver acquires, from a plurality of leads, electrocardiogram (ECG) signals that each includes an ST-segment. A processor processes the ECG signals to determine baseline and current ST-segment deviations relative to an isoelectric value. A display module displays a graph that includes a first axis representing ST-segment deviation values and a second axis representing the plurality of leads. At each location along the second axis representing a respective lead, the graph displays a first set of graphic indicia representing the baseline ST-segment deviations and a second set of graphic indicia representing the current ST-segment deviations. In certain embodiments, the graphic indicia are represented by bar graphs. In other embodiments, the graphic indicia are represented by symbols that may be connected by line segments.

Claims40

Dependent claims

A method for monitoring a patient and graphically representing ST-segment deviations, the method comprising:

acquiring electrocardiogram (ECG) signals from a plurality of leads, each ECG signal including a sequence of ST-segments between a QRS complex and a T wave;
determining a baseline ST-segment deviation from an isoelectric value for each of the plurality of leads;
determining a current ST-segment deviation from the isoelectric value for each of the plurality of leads;
displaying a graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
displaying a first set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the first set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
displaying a second set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the second set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead,
wherein displaying the first set of graphic indicia and the second set of graphic indicia comprises:
for the first set of graphic indicia, displaying a first bar graph at each of the locations along the second linear axis corresponding to a respective lead, wherein each first bar graph graphically represents the baseline ST-segment deviation for the respective lead;
and
for the second set of graphic indicia, displaying a second bar graph at each of the locations along the second linear axis corresponding to a respective lead, wherein each first bar graph graphically represents the current ST-segment deviation for the respective lead;
wherein displaying each first bar graph comprises:
displaying the first bar graph between a first value relative to the first linear axis and a second value relative to the first linear axis, wherein the first value corresponds to the isoelectric value, and wherein the second value corresponds to the baseline ST-segment deviation for the respective lead;
wherein displaying each second bar graph comprises:
displaying the second bar graph between the second value relative to the first linear axis and a third value relative to the first linear axis, wherein the third value corresponds to the current ST-segment deviation for the respective lead;
and
sloping at least a portion of the second bar graph to or from the third value to indicate a trend in the ST-segment deviation over time for the respective lead.

17 more elements

A method for monitoring a patient and graphically representing ST-segment deviations, the method comprising:

acquiring electrocardiogram (ECG) signals from a plurality of leads, each ECG signal including a sequence of ST-segments between a QRS complex and a T wave;
determining a baseline ST-segment deviation from an isoelectric value for each of the plurality of leads;
determining a current ST-segment deviation from the isoelectric value for each of the plurality of leads;
displaying a graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
displaying a first set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the first set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
displaying a second set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the second set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein the plurality of leads comprises a first subset of leads, wherein the graph further comprises a third linear axis representing a second subset of leads, wherein each of the second subset of leads is associated with a respective location along the third axis, the method further comprising:
determining baseline and current ST-segment deviations from the isoelectric value for each of the second subset of leads;
displaying a third set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the third set is displayed with respect to one of the locations corresponding to a respective lead from the second subset of leads;
and
displaying a fourth set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the fourth set is displayed with respect to one of the locations corresponding to a respective lead from the second subset of leads.

12 more elements

A method for monitoring a patient and graphically representing ST-segment deviations, the method comprising:

acquiring electrocardiogram (ECG) signals from a plurality of leads, each ECG signal including a sequence of ST-segments between a QRS complex and a T wave;
determining a baseline ST-segment deviation from an isoelectric value for each of the plurality of leads;
determining a current ST-segment deviation from the isoelectric value for each of the plurality of leads;
displaying a graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
displaying a first set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the first set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
displaying a second set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the second set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein displaying the first set of graphic indicia and the second set of graphic indicia comprises:
for the first set of graphic indicia, displaying a first symbol at each of a plurality of locations along the second linear axis corresponding to a respective lead;
and
for the second set of graphic indicia, displaying a second symbol at each of the plurality of locations along the second linear axis.

11 more elements

A method for monitoring a patient and graphically representing ST-segment deviations, the method comprising:

acquiring electrocardiogram (ECG) signals from a plurality of leads, each ECG signal including a sequence of ST-segments between a QRS complex and a T wave;
determining a baseline ST-segment deviation from an isoelectric value for each of the plurality of leads;
determining a current ST-segment deviation from the isoelectric value for each of the plurality of leads;
displaying a graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
displaying a first set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the first set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
displaying a second set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the second set is displayed with respect to one of the locations corresponding to a respective lead and is aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead,
wherein displaying the first set of graphic indicia and the second set of graphic indicia comprises:
for the first set of graphic indicia, displaying a first series of line segments between the baseline ST-segment deviation values at each of a plurality of locations along the second linear axis corresponding to a respective lead;
and
for the second set of graphic indicia, displaying a second series of line segments between the current ST-segment deviation values at each of the plurality of locations along the second linear axis.

11 more elements

A patient monitoring system for graphically representing ST-segment deviation, the system comprising:

a receiver to acquire electrocardiogram (ECG) signals through a plurality of leads, the ECG signals including an ST-segment between a QRS complex and a T wave;
a processor to process the ECG signals to determine, for each of the plurality of leads, baseline ST-segment deviations from an isoelectric value and current ST-segment deviations from the isoelectric value;
a display device for displaying a user interface;
and
a display module for displaying a graph in the user interface, the graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
wherein the display module displays a first set of graphic indicia representing the baseline ST-segment deviations, each graphic indicia in the first set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
wherein the display module displays a second set of graphic indicia representing the current ST-segment deviations, each graphic indicia in the second set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein the display module is further configured to:
for the first set of graphic indicia, display a first bar graph at each of the locations along the second linear axis corresponding to a respective lead, wherein each first bar graph graphically represents the baseline ST-segment deviation for the respective lead;
and
for the second set of graphic indicia, display a second bar graph at each of the locations along the second linear axis corresponding to a respective lead, wherein each first bar graph graphically represents the current ST-segment deviation for the respective lead;
display the first bar graph between a first value relative to the first linear axis and a second value relative to the first linear axis, wherein the first value corresponds to the isoelectric value, and wherein the second value corresponds to the baseline ST-segment deviation for the respective lead;
and
display the second bar graph between the second value relative to the first linear axis and a third value relative to the first linear axis, wherein the third value corresponds to the current ST-segment deviation for the respective lead;
and
slope at least a portion of the second bar graph to or from the third value to indicate a trend in the ST-segment deviation over time for the respective lead.

17 more elements

A patient monitoring system for graphically representing ST-segment deviation, the system comprising:

a receiver to acquire electrocardiogram (ECG) signals through a plurality of leads, the ECG signals including an ST-segment between a QRS complex and a T wave;
a processor to process the ECG signals to determine, for each of the plurality of leads, baseline ST-segment deviations from an isoelectric value and current ST-segment deviations from the isoelectric value;
a display device for displaying a user interface;
and
a display module for displaying a graph in the user interface, the graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
wherein the display module displays a first set of graphic indicia representing the baseline ST-segment deviations, each graphic indicia in the first set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
wherein the display module displays a second set of graphic indicia representing the current ST-segment deviations, each graphic indicia in the second set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein the plurality of leads comprises a first subset of leads, wherein the graph further comprises a third linear axis representing a second subset of leads, wherein each of the second subset of leads is associated with a respective location along the third axis, wherein the display module is further configured to:
determine baseline and current ST-segment deviations from the isoelectric value for each of the second subset of leads;
display a third set of graphic indicia representing the baseline ST-segment deviations, wherein each graphic indicia in the third set is displayed with respect to one of the locations corresponding to a respective lead from the second subset of leads;
and
display a fourth set of graphic indicia representing the current ST-segment deviations, wherein each graphic indicia in the fourth set is displayed with respect to one of the locations corresponding to a respective lead from the second subset of leads.

13 more elements

A patient monitoring system for graphically representing ST-segment deviation, the system comprising:

a receiver to acquire electrocardiogram (ECG) signals through a plurality of leads, the ECG signals including an ST-segment between a QRS complex and a T wave;
a processor to process the ECG signals to determine, for each of the plurality of leads, baseline ST-segment deviations from an isoelectric value and current ST-segment deviations from the isoelectric value;
a display device for displaying a user interface;
and
a display module for displaying a graph in the user interface, the graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
wherein the display module displays a first set of graphic indicia representing the baseline ST-segment deviations, each graphic indicia in the first set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
wherein the display module displays a second set of graphic indicia representing the current ST-segment deviations, each graphic indicia in the second set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein the display module is further configured to:
for the first set of graphic indicia, display a first symbol at each of a plurality of locations along the second linear axis corresponding to a respective lead;
and
for the second set of graphic indicia, display a second symbol at each of the plurality of locations along the second linear axis.

12 more elements

A patient monitoring system for graphically representing ST-segment deviation, the system comprising:

a receiver to acquire electrocardiogram (ECG) signals through a plurality of leads, the ECG signals including an ST-segment between a QRS complex and a T wave;
a processor to process the ECG signals to determine, for each of the plurality of leads, baseline ST-segment deviations from an isoelectric value and current ST-segment deviations from the isoelectric value;
a display device for displaying a user interface;
and
a display module for displaying a graph in the user interface, the graph comprising:
a first linear axis representing ST-segment deviation values;
and
a second linear axis representing the plurality of leads, wherein each of the plurality of leads is associated with a respective location along the second linear axis;
wherein the display module displays a first set of graphic indicia representing the baseline ST-segment deviations, each graphic indicia in the first set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the baseline ST-segment deviation for the respective lead;
and
wherein the display module displays a second set of graphic indicia representing the current ST-segment deviations, each graphic indicia in the second set being displayed with respect to one of the locations corresponding to a respective lead and being aligned relative to the first linear axis based on the current ST-segment deviation for the respective lead;
wherein the display module is further configured to:
for the first set of graphic indicia, display a first series of line segments between the baseline ST-segment deviation values at each of a plurality of locations along the second linear axis corresponding to a respective lead;
and
for the second set of graphic indicia, display a second series of line segments between the current ST-segment deviation values at each of the plurality of locations along the second linear axis.

12 more elements

Dependencies are inferred from the claim text.