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The Measurement of the Q-T Interval of the Electrocardiogram
Abstract
The sources of error in determination of the beginning of QRS and the end of T during measurement of the Q-T duration are analyzed. An important error is confusion of an elevated U wave with the T wave, resulting in the diagnosis of a prolonged Q-T. In such cases, some of the precordial leads usually show a notch or kink between T and U which indicates approximately the end of T. If these criteria are used, the true corrected Q-T duration in hypopotassemia without hypocalcemia is not prolonged, but normal or shortened, corresponding to an earlier appearance of the second heart sound.
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Cited by
AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram
Rautaharju, P. M., Surawicz, B., & Gettes, L. S. (2009) · Journal of the American College of Cardiology · doi:10.1016/j.jacc.2008.12.014 · Cited by 1,016
Self-citationThe long QT syndromes: A critical review, new clinical observations and a unifying hypothesis
Jackman, W. M., Friday, K. J., Anderson, J. L., Aliot, E. M., Clark, M., & Lazzara, R. (1988) · Progress in Cardiovascular Diseases · doi:10.1016/0033-0620(88)90014-x · Cited by 783
Measurement, interpretation and clinical potential of QT dispersion
Malik, M., & Batchvarov, V. N. (2000) · Journal of the American College of Cardiology · doi:10.1016/s0735-1097(00)00962-1 · Cited by 631
Chow, E., Bernjak, A., Williams, S., Fawdry, R. A., Hibbert, S., Freeman, J., Sheridan, P. J., & Heller, S. R. (2014) · Diabetes · doi:10.2337/db13-0468 · Cited by 403
The Measurement of the QT Interval
Postema, P., & Wilde, A. (2014) · Current Cardiology Reviews · doi:10.2174/1573403x10666140514103612 · Cited by 331
Metadata
- Authors
- LEPESCHKIN, E., & SURAWICZ, B.
- Venue
- Circulation
- Published
- 1952-09
- Volume
- 6
- Issue
- 3
- Pages
- 378-388
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W1994873020
- Cited by
- 624
- References
- 0
- FWCI
- 5.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- LEPESCHKIN, E., & SURAWICZ, B. (1952). The Measurement of the Q-T Interval of the Electrocardiogram. Circulation. https://doi.org/10.1161/01.cir.6.3.378
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