Key result
A novel system derives an appropriate baseline from human fetal heart-rate traces with flat or bimodal frequency distributions, enabling the measurement of accelerations or decelerations.
Describes a novel system for deriving a baseline in fetal heart-rate traces to accurately measure accelerations and decelerations.
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May aid fetal heart-rate analysis in atypical traces; leaves open clinical utility pending prospective validation.
Large variations in the pattern of normal fetal heart-rate traces near term are described. The presence of flat or bimodal frequency distributions of pulse intervals in these traces complicates the derivation of a baseline by statistical methods. A system is described for deriving an appropriate baseline from which accelerations or decelerations may be measured.
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Dawes et al. (1982) studied this question. A novel system derives an appropriate baseline from human fetal heart-rate traces with flat or bimodal frequency distributions, enabling the measurement of accelerations or decelerations.
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