Communications: electrical – Digital comparator systems
Patent
1975-07-02
1976-11-30
Shaw, Gareth D.
Communications: electrical
Digital comparator systems
340324AD, 128 206A, G06F 300, A61B 502, G06F 314, G06F 1300
Patent
active
039952592
ABSTRACT:
There is disclosed an electrocardiographic review system for displaying ECG data for each of eight patients. Whenever the data for a new patient is to be observed, two trend plots are first displayed on the screen. One of these represents the number of heartbeats per minute and the other represents the number of ectopic beats per minute, the time axis being divided into approximately 240 discrete 1-minute intervals so that the trend data for a 4-hour monitoring period can be displayed. The reviewing physician can move a cursor across the screen to a point of particular interest, for example, to a point along the time axis corresponding to a 1-minute interval during which many ectopic beats were detected. Following this, when a display key in the system is operated, a four-second stationary display of the first ECG waveform of interest which occurred during that 1-minute interval is formed. Thereafter, each operation of the display key controls the display of another 4-second ECG waveform. In this manner, the reviewing physician can determine those intervals during monitoring which are of particular interest, and can then immediately control the display of the successive 4-second ECG waveforms on the screen. The same screen is thus used to display both compressed-time trend data, and expanded-time ECG waveforms.
REFERENCES:
patent: 3522597 (1970-08-01), Murphy
patent: 3637997 (1972-01-01), Petersen
patent: 3829841 (1974-08-01), Steinberg
DePedro Donald
Harris George Jerry
American Optical Corporation
Berkenstock, Jr. H. R.
Nealon William C.
Schneeberger Stephen A.
Shaw Gareth D.
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