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Title A Microcomputer-Based Heart Rate Variability Monitor
Author(s) S. J. Cahill and G. McClure
Source Transactions on Biomedical Engineering, Vol. 30, No. 2, Pages 87-93
Publication Date Feb. 1983
Abstract A cost-effective method of on-line measurement of beat-to-beat heart-rate variability is presented. Based on a commercial microcomputer [Commodore 2001 with 8 KB RAM], the data is formatted as a histogram covering up to 500 past events in the form of a moving time window. Analysis of the QRS peak detector used in the instrumentation shows the conditions necessary for 1 ms resolution. The system permits the on-line calculation of statistical parameters, which are presented when a hard copy of the histogram is requested.

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