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.
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Reference
Wyngaarden JB, et al: Cecil Textbook of Medicine, ed. 17. Philadelphia, WB 1985, Saunders Co, p 173.
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© 1989 Springer-Verlag New York Inc.
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Doyle, D.J. (1989). Corrected QT Interval (QT). In: Computer Programs in Clinical and Laboratory Medicine. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3576-7_2
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DOI: https://doi.org/10.1007/978-1-4612-3576-7_2
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-8162-7
Online ISBN: 978-1-4612-3576-7
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