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Portable heart monitor performing multiple functions

  • US 4,974,601 A
  • Filed: 09/05/1988
  • Issued: 12/04/1990
  • Est. Priority Date: 09/05/1988
  • Status: Expired due to Term
First Claim
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1. An apparatus for monitoring multiple aspects of a patient'"'"'s cardiac condition comprising:

  • (a) means for generating a present pulse signal indicative of a patient'"'"'s present pulse rate and a present heartbeat waveform signal;

    (b) means for receiving the present pulse signal and generating an average pulse rate signal indicative of the pulse rate over a predetermined period of time;

    (c) means for storing the average pulse rate signal;

    (d) means for comparing the present pulse signal and the average pulse rate signal and generating an alarm signal if the difference between these signals exceeds a first predetermined threshold;

    (e) means for receiving the present heartbeat waveform signal and generating an average heartbeat waveform signal indicative of the patient'"'"'s average heartbeat over a predetermined period of time;

    (f) means for storing the average heartbeat waveform signal;

    (g) means for comparing the present heartbeat waveform signal and the average heartbeat waveform signal and generating an alarm signal if the difference between these signals exceeds a second predetermined threshold; and

    (h) means for storing the present heartbeat waveform signal indicative of the patient'"'"'s present heartbeat that resulted in the generation of an alarm signal.

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