Electrocardiogram analyzing apparatus, electrocardiogram analysis method, and non-transitory computer-readable storage medium

An electrocardiogram analysis method comprising:

• transmitting and receiving data, via communication section, from an electrocardiograph and an information terminal, and notifying a control section of the data received from the electrocardiograph;
• and
• executing by a processor, of
• storing, in a memory, a plurality of electrocardiogram waveforms of a subject-of-analysis for at least 24 hours, the plurality of electrocardiograms waveforms configured to be determined based on data from at least one electrocardiograph lead subject-of-analysis, the plurality of electrocardiograms waveforms generated by dividing electrocardiogram data into heartbeat-by-heartbeat pieces of data;
• classifying the plurality of electrocardiogram waveforms into a plurality of groups to make a distance between shapes of any two electrocardiogram waveforms in one group short;
• calculating a centroid waveform which is a center of mass of the plurality of electrocardiogram waveforms belonging to a selected group which is one of the plurality of groups;
• extracting, from the plurality of electrocardiogram waveforms belonging to the selected group, a representative waveform a distance from the centroid waveform which satisfies a predetermined condition indicating that the representative waveform is similar to the centroid waveform;
• accepting a reference position of a Q wave and a reference position of a T wave on the representative waveform;
• identifying correspondence between a first plurality of positions, along a time axis, on the representative waveform of a group of the plurality of groups to which a subject-of-analysis electrocardiogram waveform belongs, and a second plurality of positions on the subject-of-analysis electrocardiogram waveform along a time axis, to minimize a total value of distances between the first plurality of positions and the second plurality of positions, and
• deciding, as positions of the Q wave and the T wave included in the subject-of-analysis electrocardiogram waveform, a position on the subject-of-analysis electrocardiogram waveform corresponding to the reference position of the Q wave and the reference position of the T wave on the representative waveform represented by the correspondence,
• transmitting, via the communicating section, information for displaying the representative waveform to the information terminal,
• receiving, via the communicating section, information indicating positions of the Q wave and the T wave designated by the user on the representative waveform displayed on the information terminal through an operation section of the information terminal, and
• accepting, by the processor, the positions of the Q wave and the T wave designated by the user which the information received by the communicating section indicates, as the reference position of the Q wave and the reference position of the T wave;
• and assessing whether or not a dose of a medicine for the subject-of-analysis should be reduced or increased based on the information received by the communicating section.

An electrocardiogram analyzing system including:

• a memory configured to store a plurality of electrocardiogram waveforms of a subject-of-analysis for at least 24 hours, the plurality of electrocardiogram waveforms configured to be determined based on data from at least one electrocardiograph lead connectable to the subject-of-analysis;
• an electrocardiogram analyzing apparatus;
• and
• an information terminal,
• the electrocardiogram analyzing apparatus comprising:
• a processor;
• and
• a communicating section configured to transmit and receive data from an electrocardiograph the information terminal, and notify the processor of the data received from the electrocardiograph the information terminal,
• wherein the processor is configured to:
• acquire the plurality of electrocardiogram waveforms generated by dividing electrocardiogram data into heartbeat-by-heartbeat pieces of data;
• classify the plurality of electrocardiogram waveforms into a plurality of groups to make a distance between shapes of any two electrocardiogram waveforms in one group short;
• calculate a centroid waveform which is a center of mass of the plurality of electrocardiogram waveforms belonging to a selected group which is one of the plurality of groups;
• extract, from the plurality of electrocardiogram waveforms belonging to the selected group, a representative waveform a distance from the centroid waveform which satisfies a predetermined condition indicating that the representative waveform is similar to the centroid waveform;
• accept a reference position of a Q wave and a reference position of a T wave on the representative waveform;
• identify correspondence between a first plurality of positions, along a time axis, on the representative waveform of a group of the plurality of groups to which a subject-of-analysis electrocardiogram waveform belongs, and a second plurality of positions on the subject-of-analysis electrocardiogram waveform along a time axis, to minimize a total value of distances between the first plurality of positions and the second plurality of positions, and
• decide, as positions of the Q wave and the T wave included in the subject-of-analysis electrocardiogram waveform, a position on the subject-of-analysis electrocardiogram waveform corresponding to the reference position of the Q wave and the reference position of the T wave on the representative waveform represented by the correspondence,
• the communicating section is adapted to transmit information for displaying the representative waveform to the information terminal,
• the communicating section is adapted to receive information indicating positions of the Q wave and the T wave designated by the user on the representative waveform displayed on the information terminal through an operation section of the information terminal, and
• the processor is adapted to accept the positions of the Q wave and the T wave designated by the user which the information received by the communicating section indicates, as the reference position of the Q wave and the reference position of the T wave,
• and assess whether or not a dose of a medicine for the subject-of-analysis should be reduced or increased based on the information received by the communicating section, and the information terminal comprising:
• a display section that displays information about the position of the predetermined type of wave included in the subject-of-analysis electrocardiogram waveform.

An electrocardiogram analyzing apparatus comprising:

• a memory configured to store a plurality of electrocardiogram waveforms of a subject-of-analysis for at least 24 hours, the plurality of electrocardiogram waveforms configured to be determined based on data from at least one electrocardiograph lead connectable to the subject-of-analysis;
• a non-transitory computer-readable medium having stored therein a plurality of executable instructions;
• a processor executing the instructions;
• and
• a communicating section configured to transmit and receive data from an electrocardiogra and an information terminal, and notify the processor of the data received from the electrocardiogra and the information terminal;
• wherein the processor is adapted to execute:
• acquire, the plurality of electrocardiogram waveforms generated by dividing electrocardiogram data into heartbeat-by-heartbeat pieces of data;
• classify the plurality of electrocardiogram waveforms into a plurality of groups to make a distance between shapes of any two electrocardiogram waveforms in one group short;
• calculates a centroid waveform which is a center of mass of the plurality of electrocardiogram waveforms belonging to a selected group which is one of the plurality of groups;
• extract a representative waveform that is the most similar to the centroid waveform among the plurality of electrocardiogram waveforms belonging to the selected group;
• accept a reference position of a Q wave and a reference position of a T wave on the representative waveform;
• identify correspondence between a first plurality of positions, along a time axis, on the representative waveform of a group of the plurality of groups to which a subject-of-analysis electrocardiogram waveform belongs, and a second plurality of positions on the subject-of-analysis electrocardiogram waveform along a time axis, to minimize a total value of distances between the first plurality of positions and the second plurality of positions, and
• decide, as positions of the Q wave and the T wave included in the subject-of-analysis electrocardiogram waveform, a position on the subject-of-analysis electrocardiogram waveform corresponding to the reference position of the Q wave and the reference position of the T wave on the representative waveform represented by the correspondence,
• the communicating section is adapted to transmit information for displaying the representative waveform to the information terminal,
• the communicating section is adapted to receive information indicating positions of the Q wave and the T wave designated by the user on the representative waveform displayed on the information terminal through an operation section of the information terminal, and
• the processor is adapted to accept the positions of the Q wave and the T wave designated by the user which the information received by the communicating section indicates, as the reference position of the Q wave and the reference position of the T wave;
• and assess whether or not a dose of a medicine for the subject-of-analysis should be reduced or increased based on the information received by the communicating section.