Linear and complex heart rate dynamics vary with sex in relation to fetal behavioural states
Linear and complex heart rate dynamics vary with sex in relation to fetal behavioural states
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DOI：
10.1016/j.earlhumdev.2007.12.001
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发表时间：
2008-07-01
影响因子：
2.5
通讯作者：
Rocha, Ana Paula
中科院分区：
文献类型：
--
作者：
Bernardes, Joao;Goncalves, Hernani;Rocha, Ana Paula
背景更好地了解性别对胎儿心率的影响，可以帮助改善后者的分析，也许阐明围产期死亡的风险增加，发生在mates.Aim：为了评估线性和复杂的心率动态差异，根据胎儿性别，在产前正常足月妊娠，与胎儿行为相关的模式。研究设计和受试者：分析了187个10分钟持续时间的胎儿心率段，所述187个10分钟持续时间的胎儿心率段是用用于心电分娩图的计算机化分析的系统获得的，并被分类为胎儿行为模式A、B、C或D。他们已经获得了24名女性和23名交配足月胎儿，与顺利的围产期结局。结果：胎儿心率变异性的线性和非线性指标，即长时程不规则指数、极低频、低频和高频频谱指数、近似熵和样本熵，在雌、雄胎儿中均以B型最常见。模式A更可能与雌性胎儿相关，而模式C和D则相反。线性指数显着高于在交配比女性fetus.Conclusions，而相反的发生与非线性indexs.Conclusions：交配胎儿表现出显着更线性，显着复杂的胎儿心率活动比女性胎儿，表达的迹象，更活跃的自主神经系统和不太活跃的复杂性控制系统。在解释胎心率描记图时，可能需要考虑这些方面。(C)2007爱思唯尔爱尔兰有限公司保留所有权利。
Background. A better understanding of gender influences on fetal heart rate can help to improve analysis of the latter and perhaps elucidate the increased risk of perinatal death that occurs in mates.Aim: To assess differences in linear and complex heart rate dynamics according to fetal sex, in the antepartum period of normal term pregnancies, for patterns associated with fetal behavioural. states.Study design and subjects: One hundred and eighty seven fetal heart rate segments of 10-minute duration, acquired with a system for computerized analysis of cardiotocograms and classified into fetal behavioural patterns A, B, C or D were analysed. They had been acquired from 24 female and 23 mate term fetuses, with uneventful perinatal outcomes. Four different comparative studies between female and mate fetuses were conducted, considering different adjustments for gestational age, weight and FHR pattern.Outcome measures: Indices of linear and nonlinear fetal heart rate variability, namely, long-term irregularity index, very tow, tow and high frequency spectral indices, approximate entropy and sample entropy.Results: Pattern B was the most frequent, both in female and mate fetuses. Pattern A was more likely to be associated to female than mate fetuses, whereas the opposite occurred with patterns C and D. Linear indices were significantly higher in mate than in female fetuses, whereas the opposite occurred with nonlinear indices.Conclusions: Mate fetuses exhibited significantly more linear and significantly less complex fetal heart rate activity than female fetuses, expressing signs of a more active autonomous nervous system and of less active complexity control systems. These aspects may need to be considered when interpreting FHR tracings. (C) 2007 Elsevier Ireland Ltd. All rights reserved.