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Holter ECG report generating system

  • US 5,398,183 A
  • Filed: 12/10/1990
  • Issued: 03/14/1995
  • Est. Priority Date: 12/10/1990
  • Status: Expired due to Fees
First Claim
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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:

  • 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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