Holter ECG report generating system
First Claim
1. A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation, said system comprising:
- means for generating from the ECG tape an analog signal representative of the ECG waveforms recorded on the tape;
means for converting the analog signal into a digital signal, said means for converting includes an A/D converter providing at least two channels of 12 bit digital signal data corresponding to the analog signal and a ROM having a logarithmic look-up table therein for converting each channel of the 12 bit digital signal to an 8 bit digital signal;
computing means including a data bus, a random access memory for storing the digital signal, a processor for controlling the operation of the system and for computing from the digital signal waveforms representing the ECG;
means for displaying the waveforms representing the ECG;
a storage device connected to the data bus;
direct memory access means for moving the 16 bit digital signal data from the converting means to the storage device random access memory as an intermediate step for storing the digital signal in the storage device, the two 8 bit digital signals being processed simultaneously by the direct memory access means as 16 bit digital signal data;
whereby the resolution of low magnitude digital signals is substantially preserved while larger magnitude digital signals are represented with fewer bits.
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Accused Products
Abstract
A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation. A tape reader generates from the ECG tape an analog signal representative of the ECG waveforms recorded on the tape. An A/D converter converts the analog signal into a digital signal. A computer including a data bus, a memory, a processor controls the operation of the system. A display displays waveforms representing the ECG. A storage device is connected to the data bus. A direct memory access device moves the digital signals from the converter to the memory for storing the digital signal in the storage device. The converter provides at least a 12 bit a digital signal corresponding to the analog signal and includes means for converting the 12 bit digital signal to an 8 bit digital signal.
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Citations
25 Claims
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1. A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation, said system comprising:
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means for generating from the ECG tape an analog signal representative of the ECG waveforms recorded on the tape; means for converting the analog signal into a digital signal, said means for converting includes an A/D converter providing at least two channels of 12 bit digital signal data corresponding to the analog signal and a ROM having a logarithmic look-up table therein for converting each channel of the 12 bit digital signal to an 8 bit digital signal; computing means including a data bus, a random access memory for storing the digital signal, a processor for controlling the operation of the system and for computing from the digital signal waveforms representing the ECG; means for displaying the waveforms representing the ECG; a storage device connected to the data bus; direct memory access means for moving the 16 bit digital signal data from the converting means to the storage device random access memory as an intermediate step for storing the digital signal in the storage device, the two 8 bit digital signals being processed simultaneously by the direct memory access means as 16 bit digital signal data; whereby the resolution of low magnitude digital signals is substantially preserved while larger magnitude digital signals are represented with fewer bits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation, said system comprising:
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means for generating from the ECG tape a digital signal representative of the ECG waveforms recorded on the tape; computing means including a data bus, a memory for storing the digital signal, and a processor for controlling the operation of the system and for evaluating the digital signal to provide waveforms representing the ECG; means for displaying the waveforms representing the ECG; a storage device connected to the data bus; means for moving the digital signals from the generating means to the storage device for storing the signals in the storage device; and wherein the processor evaluates the signals at a rate independent of a rate at which the means for moving moves the digital signal from the generating means to the storage device. - View Dependent Claims (17)
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18. A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation, said system comprising:
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means for generating from the ECG tape a digital signal representative of the ECG waveforms recorded on the tape; computing means including a data bus, a memory for storing the digital signal, and a processor for controlling the operation of the system and for computing from the digital signal waveforms representing the ECG; means for displaying the waveforms representing the ECG; a storage device connected to the data bus; means for storing the digital signal in the storage device; and matching means for determining a difference between the value at various points of the waveform being and the value at corresponding points of templates in a sequential order and wherein the matching means defines a match as the lowest sum of the absolute values of each of the differences within a preset range. - View Dependent Claims (19, 20)
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21. A system used by a technician for evaluating a Holter ECG tape having a signal representing a series of waveforms thereon and for generating a report reflecting the evaluation, said system comprising:
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means for generating from the ECG tape a digital signal representative of the ECG waveforms recorded on the tape; computing means including a data bus, a memory for storing the digital signal, and a processor for controlling the operation of the system and for computing from the digital signal waveforms representing the ECG; means for displaying waveforms representing the ECG; a storage device connected to the data bus; means for storing the digital signal in the storage device; and wherein said computing means includes means for analyzing the series of waveforms according to a nondeterministic logic state analysis. - View Dependent Claims (22, 23, 24, 25)
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Specification