Search Results
Results 251 - 300 of 1287
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Arbeille Philippe - - 2005
OBJECTIVE: To design a Doppler Hypoxic index (HI), which takes into account both the duration and the intensity of fetal flow redistribution (i.e. hypoxia) for predicting the occurrence of abnormal fetal heart rate (FHR) at delivery. METHOD: Sixty-six pregnancies with hypertension and/or growth retardation (IUGR) were investigated (age: 23+/-5 years; ...
Ayres-de-Campos Diogo - - 2005
OBJECTIVE: To evaluate the capacity of computer analysis of antepartum cardiotocographs performed by SisPorto 2.0 in predicting neonatal outcome. STUDY DESIGN: A prospective observational study was conducted in eight tertiary care centres in Europe and Australia, involving pregnant women in the absence of labor, scheduled for elective caesarean section, whose ...
Vintzileos Anthony M - - 2005
OBJECTIVE: The purpose of this study was to determine the feasibility of noninvasive fetal pulse oximetry in the human fetus with transabdominal continuous-wave near-infrared spectroscopy. STUDY DESIGN: The instrument has 3 wavelength light-emitting diodes (735, 805, and 850 nm) as light sources and a photomultiplier tube as a detector. This ...
DiPietro Janet A - - 2005
The complexities of neurobehavioral assessment of the fetus, which can be neither directly viewed nor manipulated, cannot be understated. Impetus to develop methods for measuring fetal neurobehavioral development has been provided by the recognition that individual differences in neurobehavioral functioning do not originate with birth and acceptance of the key ...
Swansburg M L - - 2005
BACKGROUND: Preeclampsia during pregnancy increases a woman's risk of cardiovascular disease in two ways. Women who develop preeclampsia are at increased risk for the development of hypertension and cardiovascular disease later in life. As well, fetal adaptations (e.g., growth restriction) may lead to the development of cardiovascular risk factors (e.g., ...
Ungureanu Mihaela - - 2005
The fetal ECG can be detected in the recorded abdominal signals. A new procedure to compute the fetal heart rate (FHR) is proposed. The abdominal signal is first preprocessed in order to remove the baseline and the uterine contractions. Then the ECG of the mother (MECG) is removed using coherent ...
Sameshima Hiroshi - - 2005
We evaluated the clinical significance of late decelerations (LD) of intrapartum fetal heart rate (FHR) monitoring to detect low pH (< 7.1) in low-risk pregnancies. We selected two secondary and two tertiary-level institutions where 10,030 women delivered. Among them, 5522 were low-risk pregnancies. The last 2 hours of FHR patterns ...
Levin Michael - - 2005
Embryonic morphogenesis occurs along three orthogonal axes. While the patterning of the anterior-posterior and dorsal-ventral axes has been increasingly well characterized, the left-right (LR) axis has only recently begun to be understood at the molecular level. The mechanisms which ensure invariant LR asymmetry of the heart, viscera, and brain represent ...
Matonia A - - 2005
Cardiotocography as a simultaneous recording of fetal heart rate (FHR) and uterine contraction activity is a basic method for evaluation of fetal condition. Continuous variability of the fetal heart rate is an indirect sign of adequate oxygenation of a fetus. Unfortunately, the reverse case is not always true, signs suggesting ...
Sharland Gurleen - - 2004
In many countries, ultrasound examination is used in the second trimester to look for congenital malformations as part of routine prenatal care. While tertiary centres scanning high-risk pregnancies have reported a high degree of accuracy in the detection of congenital heart disease, many studies have shown that cardiac abnormalities are ...
Hua Xiao - - 2005
Although the fetal heart rate monitoring using ultrasound is widely used it is still not optimized for automatic measurements due to the complexity of the Doppler signal. This paper presents a new fetal heart rate (FHR) detecting algorithm, using sampling auto-correlation approach. The results obtained using the custom-built ultrasonic Doppler ...
Fan Qing-bo - - 2004
OBJECTIVE: To explore fetal arrhythmia clinical significance and its correlation with fetal prognosis. METHODS: Twenty-six cases of fetal arrhythmia detected among 12,799 pregnant women recorded over a ten-year period in Peking Uinon Medical College (PUMC) Hospital were reviewed retrospectively. Fetal arrhythmia was diagnosed by fetal auscultation, ultrasonography, electric fetal heart ...
Comani S - - 2004
Fetal magnetocardiography (fMCG) is the only noninvasive technique allowing effective assessment of fetal cardiac electrical activity during the prenatal period. The reconstruction of reliable magnetic field mapping associated with fetal heart activity would allow three-dimensional source localization. The efficiency of independent component analysis (ICA) in restoring reliable fetal traces from ...
Wong Kenny K - - 2004
The unguarded tricuspid valve is uncommon. We describe herein a fetus with a grossly dilated right ventricle and atrium, with severe tricuspid and pulmonary valvar regurgitation. The right ventricle was akinetic, and no tricuspid tissue or valvar apparatus was identified. Colour Doppler showed a highly unusual retrograde flow of blood ...
Kaneko Masatoki - - 2004
OBJECTIVE: Several studies have shown that abnormal intrapartum fetal heart rate patterns are the results from pre-existing fetal brain damage. We evaluated intrapartum fetal heart rate pattern of cytomegalovirus-infected fetuses and correlated the patterns with neurologic outcomes. STUDY DESIGN: Between 1991 and 2001, there were 20 cytomegalovirus-infected fetuses. We selected ...
Bakker P C A M - - 2004
OBJECTIVE: To determine the quality of fetal heart rate (FHR) recordings during the first and second stage of labor by quantifying the amount of fetal signal loss in relation to the method of monitoring: external ultrasound or directly via a scalp electrode. STUDY DESIGN: Analysis of 239 intrapartum recordings stored ...
Dervaitis Kristina L - - 2004
OBJECTIVE: This study was undertaken to determine the ability of intrapartum electronic fetal heart rate monitoring (EFM) plus fetal electrocardiogram (ECG) ST segment automated ANalysis (STAN, Neoventa Medical, Goteborg, Sweden) monitoring to predict metabolic acidemia (defined as an umbilical cord artery pH < 7.15 and base deficit > or = ...
Forbus Geoffrey A - - 2004
This study evaluates the accuracy of fetal echocardiograms in terms of anatomic diagnosis and predicted neonatal management over a 7-year period. Although an abnormal fetal echocardiogram is a highly reliable predictor of postnatal structural heart defects, challenges persist in the areas of conotruncal malformations, aortic arch, and pulmonary venous anomalies.
Doyle Christine - - 2004
Early detection of placental abruption often relies on the observation of vaginal bleeding; however, overt bleeding does not always occur. We report the case of an unsuspected placental abruption diagnosis that was prompted by an internal fetal scalp electrode tracing. The presence of a "normal" fetal heart rate (FHR) of ...
Hou Jia-Woei - - 2004
Fetal warfarin syndrome (FWS) or warfarin (coumadin) embryopathy is a rare condition as a result of fetal exposure to maternal ingestion of warfarin during pregnancy. A male infant, whose mother was treated with the anticoagulant (warfarin) because of a mechanical heart valve replacement after rheumatic heart disease, presented with signs ...
Breur J M P J - - 2004
The presence of maternal autoantibodies to SS-A/Ro and/or SS-B/La is associated with the development of fetal heart block. There are data suggesting that maternal treatment with steroids might reverse heart block. We report on a pregnancy in a mother with secondary Sjögren syndrome and systemic lupus erythematosus with presence of ...
Comani Silvia - - 2004
Independent component analysis (ICA) was used for the processing of cardiological signals obtained by means of fetal magnetocardiography (fMCG), a technique allowing the non-invasive recording of the weak magnetic field variations associated to the electrical activity of the fetal heart. Purpose of the present work was to verify whether a ...
Dipietro Janet A - - 2004
The enigmatic quality of the maternal-fetal relationship has been extolled throughout history with little empirical support. We apply time series analysis to data for 137 maternal-fetal pairs collected at 20, 24, 28, 32, 36, and 38 weeks gestation. Maternal heart rate and skin conductance data were digitized in tandem with ...
Oudijk Martijn A - - 2004
BACKGROUND: The morphology of the fetal ECG complex provides information on the fetal condition during labour, such as the ST segment and T-wave configuration. We hypothesised that the intrapartum fetal QT interval may provide additional information on the condition of the fetus, as it is known that the QT interval ...
Roush Scott F - - 2004
A 25-year-old woman, gravida 4 para 2, at 37 weeks gestation was evaluated and treated for preeclampsia. Overnight, the patient had a witnessed apneic episode with maternal oxygen desaturation and concurrent fetal heart rate deceleration. She subsequently delivered an infant that was small for gestational age. This is the first ...
Miller Joseph M - - 2004
OBJECTIVE: Our purpose was to the compare fetal heart reaction to external physical stimulation with the nonstress test (NST). STUDY DESIGN: This prospective study evaluates documentation of fetal heart rate accelerations by two methods. The standard NST was performed prior to the ultrasound evaluation. The NST results were unavailable to ...
Echeverría J C - - 2004
We evaluate the suitability of an enhanced detrended fluctuation analysis for studying fetal heart rate series involving imperfect quality of information. Our results indicate that to explore persistent long-range correlations, or fractality, the collection requirements of the data can be relaxed by allowing the possibility of using averaged fetal heart ...
Dildy Gary A GA - - 2004
Despite 40 years of cumulative clinical experience, and a number of randomized clinical trials, electronic fetal heart rate monitoring is perceived by many obstetrical caregivers as a suboptimal method of intrapartum fetal assessment. Fetal pulse oximetry emerged 15 years ago as a promising new technology intended to improve assessment of ...
Yumoto Yasuo - - 2004
OBJECTIVES: We report a case in which fetal ventricular tachycardia (VT) could be diagnosed, in utero, using a transabdominal fetal electrocardiogram (fECG) with motion-mode (M-mode) echocardiography. METHODS: The fetus was referred at 32 weeks' gestation due to tricuspid atresia. The fetal cardiotocogram demonstrated paroxysmal tachycardia with a ventricular rate of ...
Williams Bode - - 2004
Obstetric litigation is on the increase. A review of litigation cases reveals that the majority of claims relating to the intrapartum period arise because the cardiotocograph- (CTG) was misinterpreted or because inappropriate action was taken in the presence of fetal heart rate abnormalities. Compulsory education and training in the interpretation ...
Schifrin Barry S - - 2004
Defining the relationship between the cardiotocograph (CTG) pattern and subsequent neurological injury is confounded by the requirement that certain clinical and biochemical perinatal findings are essential for relating intrapartum events to subsequent neurological injury. Similarly, the value of CTG analysis in these cases has been compromised by antiquated terminology focused ...
Rosén Karl G - - 2004
Fetal ECG waveform analysis as an adjunct to electronic fetal monitoring (EFM) has developed over the last 3 decades. From a multitude of potential parameters, ST waveform analysis has been documented to provide the information required to shift EFM from a screening device to a diagnostic tool that meets the ...
Balki Mrinalini - - 2004
PURPOSE: To illustrate the anesthetic management of a craniotomy for suprasellar meningioma in a 28-week pregnant woman and to review the considerations for fetal monitoring during surgery. CLINICAL FEATURES: A 33-yr-old woman presented at 28 weeks of gestation with rapidly deteriorating vision in her right eye. Neuroradiological investigations revealed a ...
Modanlou Houchang D - - 2004
To address the clinical significance of sinusoidal heart rate (SHR) pattern and review its occurrence, define its characteristics, and explain its physiopathology. In 1972, Manseau et al. and Kubli et al. described an undulating wave form alternating with a flat or smooth baseline fetal heart rate (FHR) in severely affected, ...
Bolnick A D - - 2004
OBJECTIVE: The fetal mechanical PR interval obtained via pulsed Doppler has previously been demonstrated to correlate with electrocardiographic PR interval measured in the neonate. We sought to further analyze the influence of fetal heart rate and gestational age upon the fetal mechanical PR interval. METHODS: We searched our database for ...
DiPietro Janet A - - 2004
Longitudinal neurobehavioral development was examined in 237 fetuses of low-risk pregnancies from 2 distinct populations--Baltimore, Maryland, and Lima. Peru--at 20, 24, 28, 32, 36, and 38 weeks gestation. Data were based on digitized Doppler-based fetal heart rate (FHR) and fetal movement (FM). In both groups. FHR declined while variability, episodic ...
Peters Chris H L - - 2004
In order to obtain power spectral information on the fetal heart rate in stages of pregnancy earlier than labor an algorithm has been developed to calculate the fetal heart rate on a beat-to-beat basis from Doppler ultrasound cardiotocographic signals. The algorithm was evaluated by comparing the calculated fetal heart rate ...
Malcus Peter - - 2004
PURPOSE OF REVIEW: Antenatal fetal surveillance is a field of increasing importance in modern obstetrics, especially as results in perinatal care have recently made dramatic progress. It is an evolving field, and it is no longer acceptable just to wait and see when problems arise in pregnancy. During the past ...
Puertas A - - 2004
OBJECTIVES: To determine the behavior of fetal oxygenation (FSpO(2)) in different patterns of fetal heart rate decelerations (FHR). METHODS: A total of 787 decelerations were studied. RESULTS: FSpO(2) decreased significantly during decelerations, especially when the alteration was prolonged. CONCLUSIONS: Modifications in FHR occur simultaneously with alterations in FSpO(2), although the ...
Ross M G - - 2004
INTRODUCTION: Since its introduction into clinical use, the efficacy of electronic fetal heart rate (FHR) monitoring (EFM) has been questionable. This has been due partly to the marked variation in interpretation of the FHR pattern and subsequent decisions for obstetric intervention, (e.g., the need for prompt delivery). Current application of ...
Ridgeway Jeffrey J - - 2004
OBJECTIVE: To identify fetal heart rate characteristics of patients with uterine rupture compared with successful vaginal birth after cesarean (VBAC) controls. METHODS: This is a case-control study. Obstetric records of patients at the University of Washington Medical Center and Swedish Medical Center were reviewed for cases of uterine rupture. Entry ...
Nakajima Yukari - - 2004
OBJECTIVE: The purpose of this study was to clarify the influence of automobile driving in the third trimester of pregnancy on fetal heart rate and uterine contraction. METHODS: Twenty-nine pregnant women with singleton pregnancies after 28 weeks of gestation were monitored using a portable cardiotocogram during driving, and the results ...
Celik Onder - - 2004
The study was planned to determine the effects of electromagnetic fields produced by cellular phones on baseline fetal heart rate, acceleration and deceleration. Forty pregnant women undergoing non-stress test were admitted to the study. Non-stress test was obtained while the subjects were holding the CP on stand by mode and ...
Pennell, Craig Edward
[Truncated abstract] In this thesis the role of lactate measurement has been evaluated in intrapartum assessment of fetal wellbeing. Specifically, I have addressed the question of whether fetal lactate measurement is better than the assessment of fetal heart rate patterns or the measurement of pH at predicting fetal brain injury ...
Van Leeuwen P - - 2004
Biomagnetism in the perinatal domain has been dominated by fetal cardiology, and early work pointed out the potential of both fetal cardiac time intervals (CTI) and heart rate variability (HRV) for future clinical applications. Recent improvements in instrumentation have permitted numerous groups to investigate a substantial number of healthy fetuses ...
Powell Saul R - - 2004
This study assesses the vulnerability of fetal guinea pig heart to metabolic changes during acute nonlethal in utero hypoxia. Guinea pigs (50-55 days gestation) were exposed to 7% O2 for 2 h and room air for 4 h. Fetal hearts were harvested before hypoxia, at the end of hypoxia, and ...
Magenes G - - 2004
OBJECTIVES: This work aims at characterizing the variation of fetal heart rate (FHR) provoked by vibroacoustic stimulation (VAS). The FHR signal is analyzed by means of a multiparametric approach consisting of linear and nonlinear indices. METHODS: The FHR signals of 13 fetuses were collected through a US standard CTG monitor ...
Antonazzo Patrizio - - 2004
OBJECTIVES: The purpose of this study was to test the adaptation of autonomic modulation of heart rate in high-risk or in vitro fertilization (IVF) pregnancies during the first trimester. STUDY DESIGN: Thirty-three pregnant women were studied between 6.0 and 12.5 weeks of gestation and were divided into three groups: normal ...
Luttkus Andreas K - - 2004
OBJECTIVE: To evaluate the relationships between scalp-pH and CTG plus ST waveform analysis of the fetal ECG (STAN) clinical guidelines as indicators of intrapartum hypoxia in term fetuses born with cord artery acidemia. STUDY DESIGN: Data from 6999 term deliveries monitored by the STAN (R) S 21 as part of ...
Russell M L - - 2004
BACKGROUND: Survey response rates may vary by type of practitioner studied and may have declined over time. Response rates for surveys of complementary practitioners have not been studied. OBJECTIVE: To describe the response rates in published surveys of chiropractors and explore for secular trends in response rates and for methodologic ...
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