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Original Article
Developmental Changes of Spectral and Chaotic Indexes of Heart Rate Variability in Normal Fetuses
Jee-Young Jung, Myung-Kul Yum, Nam-Su Ki, Jae-Won Oh, Chang-Ryul Kim, Jung Hye Hwang, Moon-Il Park
Clin Exp Pediatr. 1998;41(10):1380-1388.   Published online October 15, 1998
Purpose : The purposes of this study were to determine the normal values of spectral and chaotic indexes and to assess the maturational process of autonomic and chaotic control of fetal heart rate according to gestational age. Methods : Three hundred and thirty-seven mothers with normal singleton pregnancies, who were 23 weeks or more in gestational age, was randomly chosen. For...
Development of Approximate Entropy of Fetal Heart Rate Varibility during Normal Pregnancy
Myung Kul Yum, Jung Hye Hwang, Moon Il Park
Clin Exp Pediatr. 1997;40(4):464-472.   Published online April 15, 1997
Purpose : The approximate entropy of heart rate variability has recently been used as a tool in evaluating cardiovascular health and physiology and in diagnosing pertubated physiologic status, by quantifying the irregularity and the pattern of the heart rate variability. Therefore approximate entropy of the fetal heart rate variability will be used as an important tool in studying the fetal...


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