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Li Hui - - 2007
BACKGROUND: Congenital heart disease (CHD) is the most common congenital disorder at birth. Yagel and colleagues's method of heart examination has been proved valuable in finding CHD prenatally in single pregnancies. The aim of this study was to analyze the frequency of CHD in twin pregnancies and the sensitivity of ...
Zahedi Edmond - - 2008
In this paper, an approach based on adaptive noise cancellation (ANC) is evaluated for extraction of the fetal heart rate using photoplethysmographic signals from the maternal abdomen. A simple optical model is proposed in which the maternal and fetal blood pulsations result in emulated signals where the lower SNR limit ...
Włoch A - - 2007
OBJECTIVE: To describe normal fetal cardiac and hemodynamic development in normal early first trimester pregnancies. MATERIALS AND METHODS: Eighty-eight women with singleton, uncomplicated pregnancies were prospectively studied with transvaginal ultrasound, pulsed and color Doppler. Heart diameter, heart rate, and inflow and outflow waveforms with valve signals were documented. The proportion ...
Harrison V - - 2007
OBJECTIVE: To determine the effects of magnesium supplementation in pregnancy on the incidence of hypoxic-ischaemic encephalopathy (HIE). DESIGN: A randomised double-blind placebo-controlled study. SETTING: A Midwife Obstetric Unit and its two referral hospitals in Cape Town, South Africa. POPULATION: A group of 4494 black pregnant women of low socio-economic status. ...
Briozzo Leonel - - 2007
AIM: To determine whether fetal intrauterine resuscitation using tocolysis and delayed delivery is better for the fetus than emergency delivery when fetal hypoxia is suspected because of a non-reassuring fetal heart-rate (FHR) pattern using conventional heart rate monitoring. METHODS: This was a prospective and randomized study, conducted between 2001 and ...
Chew C - - 2007
OBJECTIVES: Ultrasound-based screening is widely employed for the detection of congenital malformations in utero including congenital heart disease (CHD), but there is widespread variability in the efficacy of screening programs. We aimed to evaluate current antenatal detection rates of selected congenital heart defects in Victoria. METHODS: Data were collected from ...
Simpson Kathleen Rice - - 2007
When the fetal heart rate pattern is suggestive of fetal compromise during labor, various methods to promote fetal well-being are traditionally initiated. They include maternal repositioning, reduction of uterine activity, an intravenous fluid bolus, oxygen administration, correction of maternal hypotension, amnioinfusion, and alteration of second-stage labor pushing efforts. Although these ...
Csitári István Kis - - 2008
OBJECTIVES: The objective of this prospective study was to determine the reliability of fetal pulse oximetry (FPO) in cases of abnormal fetal heart rate (FHR) pattern and fetal oxygen saturation (FSpO(2)) below 30%. STUDY DESIGN: Three hundred and one deliveries complicated by abnormal FHR pattern were monitored with both CTG ...
Leech Judith A - - 2007
To demonstrate that fetal heart rate measured by ultrasound can be successfully captured and monitored throughout the nocturnal polysomnogram. Fetal heart rate by ultrasound using an abdominal belt (Hewlett Packard Fetal Monitor 8040A) was measured during 1 overnight polysomnogram in volunteers in late pregnancy and added to a digitized polysomnography ...
Van De Velde M - - 2007
Surgery during pregnancy is relatively common. The present review of the literature will focus on relevant issues such as maternal safety during non-obstetric surgery in pregnancy, teratogenicity of anesthetic drugs, the avoidance of fetal asphyxia, the prevention of preterm labor, the safety of laparoscopy, the need to monitor the fetal ...
Witter Frank - - 2007
OBJECTIVE: The purpose of this study was to determine the effect of fetal hiccups on fetal heart rate from 20 weeks of gestation onward. METHODS: One thousand four hundred and fifty-six collected fetal heart rate tracings from three cohorts that participated in longitudinal studies of fetal neurobehavioral development were reviewed ...
Belford Peter M - - 2007
Prosthesis-patient mismatch occurs when the effective prosthetic valve area is smaller than that of a normal human valve. Its importance in pregnancy is unknown. We describe an asymptomatic patient with higher than normal transvalvular gradients due to prosthesis-patient mismatch who developed congestive heart failure in late pregnancy. Our recommendation is ...
van Leeuwen P - - 2007
Fetal heart rate complexity was examined on the basis of RR interval time series obtained in the second and third trimester of pregnancy. In each fetal RR interval time series, short term beat-to-beat heart rate changes were coded in 8 bit binary sequences. Redundancies of the 2(8) different binary patterns ...
Van Leeuwen Peter - - 2007
BACKGROUND: In fetal surveillance, fetal heart rate changes are assessed using cardiotocography (CTG). Standard procedures used in the quantification of heart rate variability (HRV) are seldom applied as CTG does not deliver beat interval durations with the same accuracy as the electrocardiogram (ECG). Thus little is known about the interdependency ...
Giannubilo Stefano Raffaele - - 2007
OBJECTIVE: To assess the correlation between the total deceleration area of the fetal heart rate (FHR) pre-delivery trace and intrapartum fetal acid-base status in a low risk population. STUDY DESIGN: We analyzed the electronic fetal monitoring (EFM) traces of 26 pregnancies with fetuses presenting acidemia at delivery and those of ...
Gonçalves Hernâni - - 2007
BACKGROUND: Fetal behavioral states are important indicators of fetal physiology and pathology associated to typical fetal heart rate (FHR) patterns. AIM: To provide linear and nonlinear analysis of FHR patterns associated with fetal behavioral states regarding a better understanding of these states and patterns. STUDY DESIGN AND SUBJECTS: Fifty FHR ...
Niwa Koichiro - - 2007
OBJECTIVES: Tachyarrhythmia during pregnancy may have an adverse effect on the mother and the fetus. Heart rate variability (HRV) is a significant marker of autonomic nervous function and may predict tachyarrhythmia. HRV and incidence of arrhythmia in women with repaired congenital heart disease (CHD) during pregnancy were examined. METHODS: Twenty-eight ...
Matsuyama A - - 2007
OBJECTIVES: Automatic detection of arrhythmias is important for diagnosis of heart problems. However, in ECG signals, there is significant variation of waveforms in both normal and abnormal beats. It is this phenomenon, which makes it difficult to analyse ECG signals. The aim of developing methodology is to distinguish between normal ...
Ferrario Manuela - - 2007
A crucial problem in fetal monitoring is the correct interpretation of biophysical measurements. An important question is therefore how to decide if fetal small dimensions are physiological or due to a pathological condition, such as intrauterine growth restriction (IUGR), a metabolic dysfunction which does not allow the fetus to achieve ...
Karvounis Evaggelos C - - 2007
A three-stage methodology for the extraction of maternal and fetal heart rate using abdominal ECG leads, is presented. In the first stage, the maternal R-peaks and fiducial points (maternal QRS onset and offset) are detected, using multiscale principal components analysis (MSPCA) and the Smoothed Nonlinear Energy Operator (SNEO). Maternal fiducial ...
Mansano Roy Z - - 2007
OBJECTIVE: The addition of ST waveform analysis (STAN, Neoventa, Sweden) to fetal heart rate (FHR) tracings has been demonstrated to improve fetal outcome and reduce operative delivery rates, though the actual level of fetal acidosis at which STAN indicates intervention has not been assessed. We sought to determine if FHR ...
Bakker Petra C A M - - 2007
AIM: To summarize the currently available knowledge on (1) the methods to monitor uterine activity (UA); (2) the units to quantify UA; and (3) to assess the importance of abnormal contraction patterns on the condition of the fetus. The need for correct assessment and interpretation of the uterine contraction curve ...
Spyridou Kyriaki K - - 2007
In this paper, a new approach for feature extraction from the Fetal Heart Rate (FHR) signal is introduced. It considers the use of Continuous Wavelet Transform to extract wavelet-based features of FHR signal in order to discriminate the normal from the abnormal cases. The proposed methodology is tested on real ...
Powers Melanie J - - 2007
The present study tested the effect of ketamine on the fetal reflex responses of late-gestation sheep to brachiocephalic occlusion (BCO), a stimulus that mimics the reduction in cerebral blood flow that results from severe fetal hypotension. Ketamine, a dissociative anesthetic and known noncompetitive antagonist of N-methyl D-aspartate (NMDA) receptors, has ...
Ortiz M R - - 2006
OBJECTIVE: Several studies have suggested that the analysis of heart rate variability (HRV) during gestation provides indications of the development or maturation of fetal cardiovascular regulatory mechanisms. In this study, we evaluate the existence of short-range fractal-like correlations in fetal RR fluctuations data from the second half of human gestation. ...
Kühnert Maritta - - 2007
OBJECTIVE: Routinely antepartal cardiotocogram (CTG) is recorded for 30 min in order to obtain normal resting phases (<30 min) or a decrease of irregulatory due to hypoxia (>30 min) or to differentiate these from each other. In case of early onset of hypoxia first pathological findings might only be seen ...
David Maya - - 2007
In this study we present a noninvasive method that enables the investigation of the fetal heart rate (FHR) fluctuations. The objective was to design a quantitative measurement to assess the fetal autonomic nervous system and to investigate its development as a function of the gestational age. Our Medical Physics group ...
Rozen Amit - - 2006
BACKGROUND: Fetal heart rate (FHR) monitoring is commonly used for fetal surveillance. Despite its widespread usage, there is still a disagreement about its value in predicting fetal distress. CASE: A 29-year-old woman in her first pregnancy was admitted for routine follow-up at 38 weeks gestation. The FHR tracing demonstrated severely ...
Stoneham Anne E - - 2006
A 4-year-old, late-term pregnant Himalayan queen was diagnosed with biventricular congestive heart failure characterized by pleural effusion and pulmonary edema. A cesarean section was performed, resulting in the birth of four live kittens, with one surviving to discharge. Congestive heart failure resolved rapidly following surgery. The queen remained asymptomatic for ...
Schneider Uwe - - 2006
Intrauterine growth restriction (IUGR) remains a major problem in perinatal medicine because of the variety of its underlying causes and the prediction of its outcome. Characteristics of heartbeat interval patterns are associated with neuro-vegetative and humoral regulatory processes. Fetal magnetocardiography allows non-invasive assessment of these processes with high precision throughout ...
Van Leeuwen Peter - - 2006
It is generally assumed that fetal heart rate variability increases with gestation, reflecting prenatal development of the autonomic nervous system. We examined standard measures quantifying fetal heart rate variability, as well as a complexity measure, approximate entropy, in 66 fetal magnetocardiograms recorded from 22 healthy pregnant women between the 16th ...
Verklan M Terese - - 2006
OBJECTIVE: To obtain fetal magnetocardiogram (fMCG) recordings in preterm fetuses in both shielded and unshielded clinical settings. METHODS: Seventeen fMCG recordings were obtained from 6 low-risk fetuses of 26-35 weeks' postmenstrual age. The superconducting quantum interference device biomagnetometer was positioned over the gravid abdomen, and the signals, associated with the ...
Wahren-Herlenius Marie - - 2006
Complete congenital atrio-ventricular (AV) heart block develops in 2-5% of fetuses of Ro/SSA and La/SSB autoantibody-positive pregnant women. During pregnancy, the Ro/SSA and La/SSB antibodies are transported across the placenta and affect the fetus. Emerging data suggest that this happens by a two-stage process. In the first step, maternal autoantibodies ...
Gonçalves Hernâni - - 2006
Linear and nonlinear fetal heart rate (FHR) indices, namely mean FHR, interval index (II), very low, low and high frequencies, approximate (ApEn) and sample entropy (SampEn), were computed, immediately before delivery, in the initial and final FHR tracing segments, from 48 normal, 10 mildly acidemic and 10 moderate-to-severely acidemic fetuses. ...
Devoe Lawrence D - - 2006
OBJECTIVE: The fetal electrocardiogram system for electronic fetal monitoring (EFM) (STAN S21, Neoventa Medical, Moelndal, Sweden) has led to improved perinatal outcomes in other countries. We aimed to assess the ability of United States (US) obstetricians to use this system appropriately for intrapartum care. STUDY DESIGN: A prospective nonrandomized trial ...
Haydon Michael L - - 2006
OBJECTIVE: Using fetal pulse oximetry, we sought to quantify the impact of maternal oxygen administration in the management of nonreassuring fetal heart rate patterns. STUDY DESIGN: In fetuses with specified abnormal nonreassuring fetal heart rate patterns, oxygen was administered to the mother, and fetal oxygenation was monitored with fetal pulse ...
Rodríguez-González Miguel A - - 2006
Peripartum cardiomyopathy (PPCM) is a condition that affects women during the reproductive years in the late pregnancy period and/or early postpartum period. Although it is associated with several risk factors and various hypotheses exist of its etiology the cause of this disorder is still unknown. Standard therapy for PPCM is ...
Saburkina Inga - - 2006
The aim of the study was to determine the morphology of epicardiac ganglia in human fetuses at different stages of their development as these ganglia are considered to be of a pivotal clinical importance. Twenty-one fetal hearts were investigated applying a technique of histochemistry for acetylcholinesterase to visualize the epicardiac ...
Kalahasty Gautham - - 2006
A patient with congenital complete heart block underwent implantation of a dual-chamber pacemaker. He presented to the emergency room with fatigue and was found to be in atrial flutter. Device interrogation revealed undersensing of 5 mV flutter waves at a programmed sensitivity of 0.5 mV. Due to undersensing, mode switch ...
Fett James D - - 2006
BACKGROUND: Maternal risks with pregnancies after an index diagnosis of peripartum cardiomyopathy (PPCM) are inadequately understood. OBJECTIVE: To describe the clinical outcomes of subsequent pregnancy in Haitian women with PPCM. DESIGN: Prospectively identified cases from a defined population base, 2000-2005. SETTING: Hôpital Albert Schweitzer, Deschapelles, Haiti. PATIENTS: 15 patients with ...
Houba Catherine - - 2006
OBJECTIVE: to assess whether fetal oxymetry reduces the intervention rate in a "theoretical setting". STUDY DESIGN:Data bank including 93 cases where a fetal oxymetry had been used for suspicion of fetal distress. Subjects-Two sets of labor charts were constructed for each case. One included relevant data with the saturometry, the ...
Tegnander E - - 2006
OBJECTIVES: To determine whether training and experience in performing ultrasound examinations are factors that influence the prenatal detection of congenital heart defects (CHDs) in a non-selected population, in order to evaluate and improve the current training program. METHODS: All pregnant women who received a routine second-trimester ultrasound scan by a ...
Ahmad S Akhtar - - 2006
This study was carried out among arsenic-exposed and non-exposed people of Bangladesh to assess and compare their cardiac status based on electrocardiographic (ECG) findings. For the purpose of the study, participants were included in three groups: arsenic-exposed persons with arsenicosis (arsenicosis group), arsenic-exposed persons without arsenicosis (non-arsenicosis group), and persons ...
Westin M - - 2006
OBJECTIVE: To compare the rate of prenatal diagnosis of heart malformations between two policies of screening for heart malformations. DESIGN: Randomised controlled trial. SETTING: Six university hospitals, two district general hospitals. SAMPLE: A total of 39 572 unselected pregnancies randomised to either policy. METHODS: The 12-week policy implied one routine ...
DiPietro Janet A - - 2006
Fetal and maternal data were monitored serially at 6 gestational ages from 20 to 38 weeks in 195 Peruvian fetuses. Digitized data included fetal heart rate and motor activity, as well as maternal heart rate and electrodermal conductance. Time series analysis evaluated the development of synchrony in 2 streams of ...
Shiekh Saba Munib - - 2006
OBJECTIVE: To determine the frequency of pathological pattern of cardiotocography (C.T.G) in antepartum and intrapartum period and to evaluate the significance of those patterns in determining fetal well-being. DESIGN: Analytical study. PLACE AND DURATION OF STUDY: The study was conducted at Lady Dufferin Hospital, Karachi from February 2000 to January ...
Hanprasertpong Tharangrut - - 2006
OBJECTIVE: To establish reference ranges for first trimester embryonic/fetal heart rate in normal pregnant women. MATERIALS AND METHODS: This was a cross-sectional study. We performed ultrasonogram in 319 normal pregnant women, gestation age between 6(+0) and 14(+6) weeks and measured embryonic/fetal heart rates using M-mode. The embryonic/fetal heart rates were ...
Parer J T - - 2006
OBJECTIVE: Despite the ubiquity of electronic fetal monitoring, the validity of the relationship between various fetal heart rate (FHR) patterns and fetal acidemia has not yet been established in a large unselected series of consecutive pregnancies. The aim of this study was to examine the published literature for evidence of ...
Jezewski Janusz - - 2006
A method for comparison of two acquisition techniques that are applied in clinical practice to provide information on fetal condition is presented. The aim of this work was to evaluate the commonly used Doppler ultrasound technique for monitoring of mechanical activity of fetal heart. Accuracy of beat-to-beat interval determination together ...
Lombardi John - - 2006
The concept that the natural history of certain heart defects could be positively modified through in utero intervention has stimulated extensive research in fetal cardiac intervention and surgery since the early 1980s. Since the management of certain defects would require the use of cardiopulmonary support, extensive studies have been directed ...
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