ECG P-QRS-T onset/offset annotation method and apparatus
First Claim
1. A method for displaying a temporal relationship between various waves in an electrocardiogram, comprising:
- detecting a beginning of a first wave from a first ECG channel;
detecting a beginning of a second wave from a second ECG channel;
generating a first graphic identifier corresponding to the beginning of the first wave;
generating a second graphic identifier corresponding to the beginning of the second wave; and
displaying the first and second graphic identifiers in a third channel and spacing the graphic identifiers at relative distances from each other proportional to the amount of time that has passed between the beginning of the first and second waves.
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Abstract
An annotation channel is added to an ECG printout to graphically display the temporal relationship between P, QRS, and T waves. The annotation channel displays similar waves from different ECG channels at vertically adjacent locations so an operator can quickly verify that ECG numerical data generated by the ECG system is derived from ECG signals with reasonably detected onset and offset reference locations. To further simplify wave correlation, a set of reference identifiers are generated along a vertical line at the beginning of the first wave. The reference identifiers provide individual reference points that graphically identify time shifts between the different starting points of each recorded wave.
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Citations
21 Claims
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1. A method for displaying a temporal relationship between various waves in an electrocardiogram, comprising:
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detecting a beginning of a first wave from a first ECG channel; detecting a beginning of a second wave from a second ECG channel; generating a first graphic identifier corresponding to the beginning of the first wave; generating a second graphic identifier corresponding to the beginning of the second wave; and displaying the first and second graphic identifiers in a third channel and spacing the graphic identifiers at relative distances from each other proportional to the amount of time that has passed between the beginning of the first and second waves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for graphically displaying electrocardiogram (ECG) waveform information, comprising:
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generating an analog ECG signal derived from electrical impulses generated from the patient'"'"'s heart; detecting the beginning of a first wave in the ECG signal; detecting the end of the first wave in the ECG signal; and displaying a digital graphic including a set of identifiers corresponding to individual instances of time occurring between the detected beginning and detected end of the first wave, the number of displayed identifiers proportional to the time duration of the wave. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for comparing electrocardiogram (ECG) signals detected from various locations on a patient, comprising:
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capturing separate ECG signals from different locations on the patient; generating multiple ECG waveforms, each ECG waveform corresponding to at least one of the captured ECG signals; simultaneously displaying the ECG waveforms at the same relative instances in time in separate channels on a display; detecting at least one set of complex waves that is common to each of the ECG waveforms; generating graphic identifiers for corresponding ones of the complex waves within the one set, each graphic identifier corresponding to a selected point in time during the corresponding complex wave; and displaying the graphic identifiers in a first annotation channel for graphically correlating relative temporal differences between occurrence of the complex waves within the one set. - View Dependent Claims (19, 20)
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21. An ECG system comprising:
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means for capturing separate ECG signals from different locations on a patient; means for generating multiple ECG waveforms, each ECG waveform corresponding to at least one of the captured ECG signals; means for simultaneously displaying the ECG waveforms at the same relative instances in time in separate channels on a display; means for detecting at least one set of complex waves that is common to each of the ECG waveforms; means for generating graphic identifiers for corresponding ones of the complex waves within the one set, each graphic identifier corresponding to a selected point in time during the corresponding complex waves; and means for displaying the graphic identifiers in a first annotation channel to graphically correlative relative temporal differences between occurrences of the complex waves within the one set.
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Specification