Article

Medical and Biological Engineering and Computing

, Volume 17, Issue 6, pp 719-723

Heart rate recorder

  • H. BaharestaniAffiliated withDepartment of Electrical and Computer Engineering, University of Wisconsin
  • , W. J. TompkinsAffiliated withDepartment of Electrical and Computer Engineering, University of Wisconsin
  • , J. G. WebsterAffiliated withDepartment of Electrical and Computer Engineering, University of Wisconsin
  • , R. B. MazessAffiliated withDepartment of Radiology (Medical Physics), University of wisconsin

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Abstract

We describe the design of an instrument that can acquire and store the average heart rate of a subject over 256 time intervals of predetermined length (1 or 6 min) during normal daily activities. The instrument consists of two units: a portable recorder, worn by the patient, detects and counts heart beats, and stores their average in memory, and a display later retrieves the contents of that memory. C.M.O.S. technology and programmable operational amplifiers resulted in low power consumption (20 mW). The results obtained from this instrument were accurate to about 1 beat/min compared with Holter monitoring and telemetry.

Keywords

Activity monitoring Energy consumption Heart monitoring