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Fridericia's formula
Associated persons:
Louis Sigurd Fridericia
Description:
A formula for calculating the QT-Duration in EKG according to the frequency of the heartbeat. Based on the fact that the QT-duration in extremity EKG is dependent on frequency. This was the second such formula published and better than the first one, by Henry Cuthbert Bazett (1885-1950).
We thank Henk van der Linde for information submitted.
Bibliography:
- L. S. Fridericia:
Die Systolendauer im Elektrokardiogramm bei normalen Menschen und bei Herzkranken.
Acta Medica Scandinavica, Stockholm, 1920, 57: 469-486.
- H. C. Bazett:
An analysis of the time-relations of the electrocardiogram. Heart, 1920, 7: 353-370.
- P. E. Puddu, R. Jouve, S. Mariotti, et al:
Evaluation of ten QT prediction formulas in 881 middle-aged men from the seven countries study: emphasis on the cubic-root Fridericia's equation.
Journal of Electrocardiology, 1988, 21: 219-229.
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