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A computer program for processing impedance cardiographic data: Improving accuracy through user-interactive softwareThis report contains the source code and documentation for a computer program used to process impedance cardiography data. The cardiodynamic measures derived from impedance cardiography are ventricular stroke column, cardiac output, cardiac index and Heather index. The program digitizes data collected from the Minnesota Impedance Cardiograph, Electrocardiography (ECG), and respiratory cycles and then stores these data on hard disk. It computes the cardiodynamic functions using interactive graphics and stores the means and standard deviations of each 15-sec data epoch on floppy disk. This software was designed on a Digital PRO380 microcomputer and used version 2.0 of P/OS, with (minimally) a 4-channel 16-bit analog/digital (A/D) converter. Applications software is written in FORTRAN 77, and uses Digital's Pro-Tool Kit Real Time Interface Library, CORE Graphic Library, and laboratory routines. Source code can be readily modified to accommodate alternative detection, A/D conversion and interactive graphics. The object code utilizing overlays and multitasking has a maximum of 50 Kbytes.
Document ID
19890002821
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Cowings, Patricia S.
(NASA Ames Research Center Moffett Field, CA, United States)
Naifeh, Karen
(NASA Ames Research Center Moffett Field, CA, United States)
Thrasher, Chet
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 5, 2013
Publication Date
October 1, 1988
Subject Category
Aerospace Medicine
Report/Patent Number
NAS 1.15:101020
A-88260
NASA-TM-101020
Accession Number
89N12192
Funding Number(s)
PROJECT: RTOP 199-22-22-32
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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