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On-line microcomputer system for analysis of precordial maps.

Publication ,  Journal Article
Henderson, MB; Armstrong, PW
Published in: J Electrocardiol
1982

An inexpensive system was developed for automated on-line analysis of ST segment heights, Q, R, and S heights and areas under these peaks, using an LSI-11 microcomputer. System accuracy was evaluated using a computer graphics technique which enabled magnification and labelling of the computed peaks on 60 maps from 17 patients. To compare the computer with hand analysis, the sigma ST (.06 seconds from S nadir) for 20 maps was calculated by three blinded observers. Correct computer evaluation occurred in all but five of 2058 leads. The mean observer sigma ST was 3.2 millivolts (range 0.77-7.5 mv). Mean inter-observer SD was +/-0.21 mv. The mean computer sigma ST was 3.5 mv (range 0.82-9.3 mv). The spread between computer and observer was +/-0.45 mv. Discrepancies between computer and observer were due to cumulative imprecision in observer measurements. This system has proven to be a practical and economic solution to handling the large volume of data accumulated with serial precordial mapping. It is considerably more precise than conventional hand analysis. Additionally, the system's versatility makes it ideally suited to many clinical and research functions.

Duke Scholars

Published In

J Electrocardiol

DOI

ISSN

0022-0736

Publication Date

1982

Volume

15

Issue

3

Start / End Page

289 / 294

Location

United States

Related Subject Headings

  • Online Systems
  • Myocardial Infarction
  • Microcomputers
  • Humans
  • Electrocardiography
  • Computers
  • Cardiovascular System & Hematology
  • 3201 Cardiovascular medicine and haematology
  • 1102 Cardiorespiratory Medicine and Haematology
 

Citation

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Henderson, M. B., & Armstrong, P. W. (1982). On-line microcomputer system for analysis of precordial maps. J Electrocardiol, 15(3), 289–294. https://doi.org/10.1016/s0022-0736(82)80032-0
Henderson, M. B., and P. W. Armstrong. “On-line microcomputer system for analysis of precordial maps.J Electrocardiol 15, no. 3 (1982): 289–94. https://doi.org/10.1016/s0022-0736(82)80032-0.
Henderson MB, Armstrong PW. On-line microcomputer system for analysis of precordial maps. J Electrocardiol. 1982;15(3):289–94.
Henderson, M. B., and P. W. Armstrong. “On-line microcomputer system for analysis of precordial maps.J Electrocardiol, vol. 15, no. 3, 1982, pp. 289–94. Pubmed, doi:10.1016/s0022-0736(82)80032-0.
Henderson MB, Armstrong PW. On-line microcomputer system for analysis of precordial maps. J Electrocardiol. 1982;15(3):289–294.
Journal cover image

Published In

J Electrocardiol

DOI

ISSN

0022-0736

Publication Date

1982

Volume

15

Issue

3

Start / End Page

289 / 294

Location

United States

Related Subject Headings

  • Online Systems
  • Myocardial Infarction
  • Microcomputers
  • Humans
  • Electrocardiography
  • Computers
  • Cardiovascular System & Hematology
  • 3201 Cardiovascular medicine and haematology
  • 1102 Cardiorespiratory Medicine and Haematology