Method and system for quantitatively determining EKG waveform organization

• US 5,776,069 A
• Filed: 01/09/1997
• Issued: 07/07/1998
• Est. Priority Date: 01/09/1997
• Status: Expired due to Fees

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Platt, John S.
• Primary Examiner(s): Jastrzab, Jeffrey R.
• Application Number:
  US08/781,115
• Time in Patent Office: 544 Days
• Field of Search: 600/509, 600/515-518, 600/521
• US Class Current: 600/515
• CPC Class Codes: A61B 5/364 Detecting abnormal ECG interval, e.g. extrasystoles, ectopic heartbeats

Abstract

A method and system for assessing the regularity of heart function, to be utilized with electrocardiographic (hereinafter "EKG") waveform representations of heart function. The method and system work by first monitoring and recording a particular patient'"'"'s EKG waveform data for a defined period of time. As the EKG waveform data is being monitored and recorded, a set of EKG waveforms is created from the monitored and recorded data. The set is made up of waveforms deemed to be dissimilar. After the defined period of time has elapsed, the total number of dissimilar waveforms in the set are counted, and the total count of the dissimilar waveforms in the set is divided by total number of waveforms that were contained within the EKG data recorded and monitored during the defined period of time. The result of this division is deemed the disorganization index, and serves as a measure of how dissimilar succeeding waves in the EKG wavetrain data were, and thus gives a good indication of the regularity of heart function.

Claims

1. A method for assessing the regularity of heart function, to be utilized with electrocardiographic waveform representations of heart function, said method comprising the steps of:

monitoring and recording a patient'"'"'s electrocardiographic waveform data for a predetermined period of time;

creating, from said patient'"'"'s monitored and recorded electrocardiographic waveform data a set of dissimilar electrocardiographic waveforms; and

calculating a disorganization index on the basis of said set of dissimilar waveforms and said monitored and recorded electrocardiographic waveform data such that the regularity of said patient'"'"'s heart function is assessed on the basis of said disorganization index.

2. The method of claim 1, wherein said step of creating a set of dissimilar electrocardiographic waveforms further comprises the steps of:

comparing each waveform of said patient'"'"'s monitored and recorded electrocardiographic waveform data with each waveform in a previously stored set of dissimilar EKG waveforms; and

in response to said comparison, adding to said previously stored set of dissimilar electrocardiographic waveforms each electrocardiographic waveform from said patient'"'"'s monitored and recorded electrocardiographic waveform data that fails to approximately match any EKG waveform in said previously stored set of dissimilar EKG waveforms.

3. The method of claim 1, wherein said step of calculating a disorganization index further comprises the steps of:

summing the total number of waveforms in said created set of dissimilar electrocardiographic waveforms;

summing the total number of individual waveforms in said patient'"'"'s monitored and recorded electrocardiographic waveform data; and

dividing said sum of the total number of waveforms in said created set of dissimilar electrocardiographic waveforms by said sum of the total number of individual waveforms in said patient'"'"'s monitored and recorded waveforms and designating the result of said division to be said disorganization index.

4. A system for assessing the regularity of heart function, to be utilized with electrocardiographic waveform representations of heart function, said system comprising:

means for monitoring and recording a patient'"'"'s electrocardiographic waveform data for a predetermined period of time;

means for creating from said patient'"'"'s monitored and recorded electrocardiographic waveform data a set of dissimilar electrocardiographic waveforms; and

means for calculating a disorganization index on the basis of said set of dissimilar waveforms and said monitored and recorded electrocardiographic waveform data such that the regularity of said patient'"'"'s heart function is assessed on the basis of said disorganization index.

5. The system of claim 4, wherein said means for creating a set of dissimilar electrocardiographic waveforms further comprises:

means for comparing each waveform of said patient'"'"'s monitored and recorded electrocardiographic waveform data with each waveform in a previously stored set of dissimilar EKG waveforms; and

means for adding, in response to said comparison, to said previously stored set of dissimilar electrocardiographic waveforms each electrocardiography waveform from said patient'"'"'s monitored and recorded electrocardiography waveform data that fails to approximately match any EKG waveform in said previously stored set of dissimilar EKG waveforms.

6. The system of claim 4, wherein said means for calculating a disorganization index further comprises:

means for summing the total number of waveforms in said created set of dissimilar electrocardiographic waveforms;

means for summing the total number of individual waveforms in said patient'"'"'s monitored and recorded electrocardiographic waveform data; and

means for dividing said sum of the total number of waveforms in said created set of dissimilar electrocardiographic waveforms by said sum of the total number of individual waveforms in said patient'"'"'s monitored and recorded waveforms and designating the result of said division to be said disorganization index.