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Corrected QT Interval (QT)

  • D. John Doyle

Abstract

The QT interval of the electrocardiogram (ECG) is measured from the onset of ventricular activity to the end of the T wave. Because the QT interval varies with heart rate in normal individuals a “corrected” QT interval is sometimes calculated to factor out heart rate-dependent effects to provide a measure that is independent of rate effects. A normal corrected QT interval should not exceed 440 msec.

Keywords

Public Health Heart Rate Internal Medicine Input Data Computer Program 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Reference

  1. 1.
    Wyngaarden JB, et al: Cecil Textbook of Medicine, ed. 17. Philadelphia, WB 1985, Saunders Co, p 173.Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1989

Authors and Affiliations

  • D. John Doyle
    • 1
  1. 1.Institute of Biomedical Engineering and Department of AnaesthesiaUniversity of TorontoTorontoCanada

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