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Method and improved apparatus for analyzing heart activity

  • US 4,628,939 A
  • Filed: 11/10/1983
  • Issued: 12/16/1986
  • Est. Priority Date: 09/11/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for producing and displaying an electrical signal indicative of the electrical energy characteristics of the heart, comprising:

  • (a) a pickup device having pickup electrodes adapted for contact with the skin of a patient and having an output circuit;

    (b) an active circuit element coupled between one of said pickup electrodes and said output circuit and being in one state of electrical conduction when said pickup is not in contract with the skin of a patient and being in a different state of electrical conduction when said pickup electrodes are in contact with the skin of a patient;

    (c) amplification and display means electrically coupled ot said output circuit for displaying the electical output of said pickup device; and

    (d) control means responsive to the state of electrical conduction of said active element when said electrodes are in contact with the skin of a patient for lowering the frequency response of said amplification and display means.

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