QT INTERVAL MONITORING SYSTEM WITH ALARMS AND TRENDING
First Claim
1. An ECG system for monitoring QT interval information comprising:
- a source of ECG signal information;
a QT interval processor responsive to ECG signal information which operates to produce QT interval information; and
a variably settable alarm, responsive to the QT interval information, which issues an alarm when an alarm limit of the variably settable alarm is exceeded.
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Accused Products
Abstract
An ECG monitoring system continuously monitors a patient'"'"'s ECG waveform and periodically identifies the patient'"'"'s QT interval. QT interval values are averaged over time and a corrected interval value QTc and a change in QTc relative to a baseline, dQTc, are periodically produced. An alarm is responsive to updated QT interval values and issues an alarm whenever a selected QT value exceeds an alarm limit. The periodically produced QT interval values are stored and a trend display may be produced showing changes in the QT interval information over different periods of time. The trend display may selectively display the trend information either graphically or in tabular form.
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Citations
25 Claims
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1. An ECG system for monitoring QT interval information comprising:
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a source of ECG signal information; a QT interval processor responsive to ECG signal information which operates to produce QT interval information; and a variably settable alarm, responsive to the QT interval information, which issues an alarm when an alarm limit of the variably settable alarm is exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An ECG system for monitoring QT interval information comprising:
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a source of ECG signal information; a QT interval processor responsive to ECG signal information which operates to periodically produce QT interval information; a storage device responsive to the QT interval processor which stores QT interval information as a function of time; and a display responsive to stored QT interval information and operable to display recalled QT interval information as a function of time. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An ECG system for monitoring QT interval information comprising:
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a source of ECG signal information; a QT interval processor responsive to ECG signal information which operates to periodically produce QT interval information; a storage device responsive to the QT interval processor which stores QT interval information as a function of time; a trend processor, responsive to QT interval information which operates to calculate the trend of QT information over a period of time; and a display responsive to the trend processor and operable to display a trend of QT information over the period of time. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification