Abstract
For almost eighty years interest has continued in the relationship between the heart rate and the duration of electrical systole, more usually expressed as the QT/RR relationship. In 1920 Fridericia (1) concluded that the relationship could best be described by a cube root formula and, within weeks, Bazett (2) independently suggested that a square root formula QT = k √ RR fitted his data and that of several other workers. By 1947 this had become accepted as “Bazett’s Law” (3) and was in widespread use for estimating from the QT and RR-intervals observed at a particular time, the value of “QTc,” the QT-interval “corrected” to a standard RR-interval of one second so allowing comparison of QT-intervals between individuals or the change in QT-interval over time in a single individual.
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Neilson, J.M. (2000). Dynamic QT-Interval Analysis. In: Osterhues, HH., Hombach, V., Moss, A.J. (eds) Advances in Noninvasive Electrocardiographic Monitoring Techniques. Developments in Cardiovascular Medicine, vol 229. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4090-4_12
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DOI: https://doi.org/10.1007/978-94-011-4090-4_12
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