R. C. Barr
ABSTRACT
We have approached the study of the electrical activity of the heart by separating the work into two distinct phases - data acquisition and data analysis. The data acquisition program monitors the activity of the heart, samples as many as 24 electrodes simultaneously, and displays them to the investigator. It concurrently executes as many as eleven tasks, uses multiple real time clocks, and allows continuous operator control with exhaustive error checking. The data analysis program tabulates the data previously recorded on tape and allows an operator to select portions to be amplified with respect to time and voltage. Data time sequences can be converted to spatial displays such as contour maps or perspective plots. The program operates by successively applying functions to a data base of over two million bytes. The functions which process the data are organized as an easily expandible set of overlays of about 80,000 program lines. We think that these capabilities can only be achieved by separating the data acquisition from the data analysis.
- 1.R.C. Barr, G.S. Herman-Giddens, M.S. Spach, R.B., Warren, "A Computer System for Cardiac Electrical Measurement and Control," Proc. 28th ACEMB, Sept. 20-24, 1975, New Orleans, La., pp. 504.Google Scholar
- 2.G.S. Herman-Giddens, R.C. Barr, M.S. Spach, R.B. Warren, M.N. Morrow, "Processing of Electrical Wave Forms from the Heart," Proc. 28th ACEMB, Sept. 20-24, 1975, New Orleans, La., pp. 283.Google Scholar
- 3.G.S. Herman-Giddens, R.B. Warren, R.C. Barr, M.S. Spach, "An Approach to Structured Programming for Users of Small Computer," Proc. Annual Southeast Regional Meeting of the ACM, April 14-16, 1975, Raleigh N.C., pp. 372-394.Google Scholar
- 4.G.S. Herman-Giddens, R.B. Warren, R.C. Barr, M.S. Spach, "BIOMAC: Block Structured Programming Using PDP-11 Assembler Language," SOFTWARE: Practice and Experience, Vol. 5, No. 4, Oct.-Dec. 1975, pp. 359-374.Google ScholarCross Ref
- 5.J.R. Cox, "A Data-Processing Computer for Bio-Electrical Signals," Abstracts of Current Bio-Medical Electronic Research Projects, IRE Trans. on Bio-Medical Electronic s, 1961, pp. 265.Google Scholar
- 6.R.B. Warren, R.C. Barr, G.S. Herman-Giddens, M.S. Spach, "Display of Electrical Wave Forms from the Heart," Computer Graphics: A quarterly Report of the SIGGRAPH-ACM, Vol. 9, No. 3,Fall 1975, pp. 17-30. Google ScholarDigital Library
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