Method and apparatus for displaying electrocardiographic signals
First Claim
1. An improvement in a system for processing predetermined physiological signals in combination with an oscilloscope display and a fixed medium, said improvement comprising:
- means for defining a first, second and third interval;
means for displaying said signals in one of a plurality of display formats during said first time interval on said oscilloscope display when said signals are read from said fixed medium, said signals being displayed in said oscilloscope display from said fixed medium at a rate greater than the rate at which said signals occurred in real time;
means for annotating said signals with a predetermined parameter according to said one of said plurality of display formats during said second time interval subsequent to said first time interval; and
means for marking said signals in said one format to identify a plurality of detected physiological events corresponding to portions of said signals during said third time interval subsequent to said first time interval, each of said means being mutually coupled to coordinate displaying, annotating and marking in said one display format,whereby an annotated and marked display of physiological signals corresponding to a long period of time can be displayed, analyzed and marked in a substantially shorter period of time by a system of minimal complexity.
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Accused Products
Abstract
An improved system for displaying annotated physiological signals processes the signals for two-dimensional display on an oscilloscope, for annotation with time-of-day and patient information, and for marking relative to a plurality of detected, abnormal physiological events. The physiological signal is traced during a first time interval after which the time-of-day and patient information is annotated appropriately on the display during a second time interval. During a third time interval, the display is marked to identify those physiological events which have been detected by the system as being abnormal. The display is created with maximum fidelity and without loss of signal information by this three pass process. Two independent channels of physiological signals are displayed on alternate horizontal lines in the display, again without loss of signal fidelity, by tracing the first channel during a first sweep and simultaneously storing the second channel within a memory for display during a second sweep.
12 Citations
10 Claims
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1. An improvement in a system for processing predetermined physiological signals in combination with an oscilloscope display and a fixed medium, said improvement comprising:
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means for defining a first, second and third interval; means for displaying said signals in one of a plurality of display formats during said first time interval on said oscilloscope display when said signals are read from said fixed medium, said signals being displayed in said oscilloscope display from said fixed medium at a rate greater than the rate at which said signals occurred in real time; means for annotating said signals with a predetermined parameter according to said one of said plurality of display formats during said second time interval subsequent to said first time interval; and means for marking said signals in said one format to identify a plurality of detected physiological events corresponding to portions of said signals during said third time interval subsequent to said first time interval, each of said means being mutually coupled to coordinate displaying, annotating and marking in said one display format, whereby an annotated and marked display of physiological signals corresponding to a long period of time can be displayed, analyzed and marked in a substantially shorter period of time by a system of minimal complexity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An improvement in a method for displaying annotated physiological signals on single beam oscilloscope at a rate substantially greater than the rate at which said signals occurred in real time, said signals being marked relative to a plurality of detected physiological events and displayed in one of a plurality of display formats, said improvement comprising the steps of:
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receiving, processing and displaying said signals during a first time interval on said oscilloscope in said one of said plurality of display formats; annotating said signals with a parameter according to said one display format during a second time interval; and marking said signals according to said one display format to identify a plurality of said detected physiological events during a third time interval, whereby an annotated and marked display of physiological signals can be generated at said greater rate on a single beam oscilloscope with minimal circuit complexity and maximal fidelity. - View Dependent Claims (9, 10)
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Specification