Abstract
The present paper describes a set of interactive computer programs and methods (i.e., cardiac component analysis, CCA) that allow the collection, summation, and averaging of the time durations of the various ECG components. The programs are written in FORTRAN and run on a Texas Instruments minicomputer using an Intecolor 8001 terminal as the display device. The program’s features include analog-to-digital conversion, color display of individual heart-beats, operator interaction, and statistical summation with tabular output. Subroutines are well structured and easily transported to other machines. Although these programs may be used on-line, it has been more efficient to perform the analyses off-line, after a subject has completed the task. Various versions of the program have been used to analyze human, baboon, and dog ECGs in 2- to 30-sec epochs, at sample rates of 258 and 1,000 samples/sec. Preliminary results from an experiment of the effects of meditation and cognitive overload are discussed.
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The Intecolor terminals were funded in part through a cost-sharing ISEP grant from the National Science Foundation (SER 77-10916). Programming support was funded in part through contracts from Technology Incorporated and the Air Force (F33617-78-D-0629). The authors gratefully acknowledge the early program development efforts of Barbara A. Boigegrain.
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Eddy, D.E., McKendree, J., McKenzie, R.E. et al. Component analysis of ECG by computer. Behavior Research Methods & Instrumentation 14, 290–293 (1982). https://doi.org/10.3758/BF03202168
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DOI: https://doi.org/10.3758/BF03202168