Search Results
Results 201 - 250 of 1292
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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 ...
Norén Håkan - - 2006
OBJECTIVE: The purpose of this study was to monitor the introduction of the STAN-methodology (Noventa Medical, Moelndal, Sweden). STUDY DESIGN: This was a prospective observational study covering the total population of deliveries at term during 2 years. Four thousand eight hundred and thirty out of 14,687 term pregnancies were monitored ...
Matonia Adam - - 2006
Bioelectrical fetal heart activity being recorded from maternal abdominal surface contains more information than mechanical heart activity measurement based on the Doppler ultrasound signals. However, it requires extraction of fetal electrocardiogram from abdominal signals where the maternal electrocardiogram is dominant. The simplest technique for maternal component suppression is a blanking ...
Salamalekis Emmanuel - - 2006
AIM: Previous studies indicate that the addition of wavelet analysis of the fetal pulse oximetry tracings (FSPO2) and fetal heart rate (FHR) variability to cardiotocography (CTG), for intrapartum fetal monitoring, provides useful information on the fetal response to hypoxia. We applied the new procedure in non-reassuring CTG patterns, in which ...
Fujimori Keiya - - 2006
AIM: The purpose of this study was to determine a relationship between sporadic fetal heart rate (FHR) decelerations and fetal electrocortical changes in physiologically normal sheep fetuses. MATERIALS AND METHODS: A total of 20 experimental observations were conducted on eight chronically instrumented fetal lambs. For electrocorticogram (ECoG) recording, two stainless ...
Hamdi Kobra - - 2006
Although it is well-known that postterm pregnancies are associated with the risk of perinatal morbidity and mortality, a comprehensive study on its management is lacking. The aim of present study was to determine whether ketonuria is associated with abnormal fetal test results in pregnancies >40 weeks of gestation. In this ...
Najafabadi Farshid Soheili - - 2006
In this paper, an algorithm based on independent component analysis (ICA) for extracting the fetal heart rate (FHR) from maternal abdominal electrodes is presented. Three abdominal ECG channels are used to extract the FHR in three steps: first preprocessing procedures such as DC cancellation and low-pass filtering are applied to ...
Salamalekis E - - 2006
OBJECTIVE: To determine whether the computerized analysis of fetal heart rate variability with the new matching pursuit technique can indicate fetal distress during labor. STUDY DESIGN: Eighty women were studied during the intrapartum period with external cardiotocography. In all cases, cord arterial pH and 5-min Apgar Scores were evaluated. Six ...
Romano M - - 2006
Cardiotocography is the most diffused prenatal diagnostic technique in clinical routine. The simultaneous recording of foetal heart rate (FHR) and uterine contractions (UC) provides useful information about foetal well-being during pregnancy and labour. However, foetal electronic monitoring interpretation still lacks reproducibility and objectivity. New methods of interpretation and new parameters ...
Smrcek Jan Michael - - 2006
OBJECTIVE: The purpose of this study was to evaluate the detection rate of early fetal echocardiography and the in utero development of congenital heart defects (CHD). METHODS: Cases were selected from all singleton pregnancies between 1997 and 2003 in which detailed fetal 2-dimensional and color-coded Doppler echocardiography was performed in ...
Buscicchio Giorgia - - 2006
OBJECTIVE: We aimed to show that in pregnancies complicated by preterm premature rupture of membranes (pPROM), there are alterations to the fetal heart rate pattern that can be detected by computerized analysis. METHODS: The study population consisted of 27 pregnant women with pPROM at 29-34 weeks of gestation and 33 ...
Cao Hanqing - - 2006
Continuous electronic fetal heart rate (FHR) monitoring during labor is motivated by the clinical experience that fetal distress causes loss of FHR variation and the occurrence of decelerations late during uterine contraction. This practice is of uncertain clinical benefit, perhaps because the interpretation is qualitative. We have developed new quantitative ...
Tuncali Bahattin - - 2006
Malignant brain tumors during pregnancy are rare, and these patients seldom require immediate surgical intervention. A 27-year-old pregnant woman underwent emergency craniotomy. Anesthesia was induced with intravenous thiopental-fentanyl; it was maintained with isoflurane in oxygen and continuous intravenous remifentanil infusion. We used full stomach precautions but omitted succinylcholine for fear ...
Webster William S - - 2006
Cleft lip (CL) is a common malformation that has both genetic and exogenous causes. The main pharmaceutical cause is exposure to phenytoin during early facial development in the 5th to 6th weeks of gestation. Phenytoin also causes CL if administered to pregnant rats during the period of early facial development. ...
McLean Matthew D - - 2006
In the axolotl, Ambystoma mexicanum, a simple, recessive cardiac-lethal mutation in gene "c" results in the hearts of c/c homozygous animals being deficient in sarcomeric tropomyosin (TM) and failing to form mature myofibrils. Subsequently, the mutant hearts do not beat. A three-step model of myofibril assembly recently developed in cell ...
Ferrario Manuela - - 2006
This paper considers the multiscale entropy (MSE) approach for estimating the regularity of time series at different scales. Sample entropy (SampEn) and approximate entropy (ApEn) are evaluated in MSE analysis on simulated data to enhance the main features of both estimators. We applied the approximate entropy and the sample entropy ...
Hopkins Paul P Sch. of Comput. Commun. & Electron., Plymouth Univ, - - 2006
This study examines a novel methodology for continuous fetal heart rate variability (FHRV) assessment in a non-stationary intrapartum fetal heart rate (FHR). The specific aim was to investigate simple statistics, dimension estimates and entropy estimates as methods to discriminate situations of low FHRV related to non-reassuring fetal status or as ...
Peters Chris C Dept. of Clinical Phys., Maxima Med. Center, Veldhoven, The Netherlands. - - 2006
Multi-electrode electrical measurements on the maternal abdomen may provide a valuable alternative to standard fetal monitoring. Removal of the maternal ECG from these recordings by means of subtracting a weighted linear combination of segments from preceding maternal ECG complexes, results in fetal ECG traces from which the fetal heart rate ...
Padhye Nikhil S NS Univ. of Texas Health Sci. Center, Houston, TX 77030, USA. - - 2006
In a pilot study of fetal heart rate variability using magnetocardiograms it was found that substantial changes occur in complexity as the fetus matures. The self-similarity parameter increased sharply from 26 weeks to 30 weeks gestational age, while the relationship of entropy to timescale reversed during the same period. This ...
Hindley Carol - - 2005
AIM: The aim of this paper is to report the development and use of a tool to appraise guidelines for fetal heart rate monitoring and discuss the findings generated in the appraisal process. BACKGROUND: Expert guidance on the appropriate method of monitoring the fetal heart in labour has been available ...
Trochez Ruben D - - 2005
OBJECTIVE: To investigate whether accelerations of the fetal heart rate in response to scalp stimulation (the scalp stimulation test) before fetal scalp blood sampling (FBS) are such a good predictor of fetal well-being as to render the FBS unnecessary. METHODS: A retrospective observational study. Cardiotocograms (CTG) from 54 fetuses during ...
Maeda Kazuo - - 2005
OBJECTIVES: Computerized automatic detection of pathologic fetal sinusoidal heart rate (FSHR) and its differentiation from physiologic FSHR is the purpose of this study. The results will be applied in the objective evaluation of fetal heart rate (FHR) with artificial neural network computer. METHODS: FHR tracings of pathologic FSHR of 9 ...
Breukelman Simone P - - 2005
A higher incidence of fetal losses, especially after the use of artificial reproduction techniques, asks for more intensive monitoring of bovine pregnancies. In this study, a model for fetal death (FD) was created by administering the antiprogesterone aglepristone twice, at Day 47 and 48 of gestation (n=5). Control heifers received ...
Hobbs Charlotte A - - 2005
BACKGROUND: Women who have had pregnancies that were affected by nonsyndromic congenital heart defects have alterations in the homocysteine-methionine pathway that may indicate increased exposure to oxidative stress or reduced antioxidant defense or both. OBJECTIVE: Our goal was to establish a maternal metabolic risk profile for nonsyndromic congenital heart defects ...
Li Hui - - 2005
OBJECTIVE: To study the value of detecting fetal congenital heart disease (CHD) using the five transverse planes technique of fetal echocardiography. METHODS: Nine hundred and eighty-two high-risk pregnancies for fetal CHD were included in this study, the fetal heart was scanned with the five transverse planes technique of fetal echocardiography ...
Jansson Lauren M - - 2005
OBJECTIVE: The purpose of this study was to investigate the effect of methadone on fetal neurobehavioral functions and maternal physiologic indicators. STUDY DESIGN: Forty women attending a substance abuse treatment facility with otherwise uncomplicated pregnancies were evaluated at peak and trough methadone levels. Fetal measures included heart rate, variability, periodic ...
Rotmensch Sigi - - 2005
OBJECTIVE: Computerized fetal heart rate (FHR) analysis revealed that antenatal corticosteroids transiently suppress multiple parameters of fetal well-being, potentially leading to the erroneous diagnosis of fetal distress and to unnecessary iatrogenic delivery of premature infants. Our aim was to determine whether clinicians who visually analyze FHR tracings detect these suppressive ...
Li Xiaotian - - 2005
BACKGROUND: The aim of this study is to investigate the relationship between approximate entropy (ApEn) of fetal heart rate (FHR) with umbilical blood gas parameters and the power spectrum of FHR variability in Chinese and to test whether ApEn of FHR variability could be used as a predictor of fetal ...
Amer-Wåhlin I - - 2005
BACKGROUND: In a large Swedish multicenter randomized controlled trial (RCT) on intra partum fetal monitoring with automatic analysis of fetal ECG waveform (STAN) in combination with cardiotocography (CTG) (4966 parturients, 300 obstetricians and midwives managing the patients), interim analysis revealed protocol violations. By a post hoc analysis of the results ...
Kikuchi Akihiko - - 2005
OBJECTIVE: Our objective was to examine whether heart rate time series of healthy normal fetuses possess fractal properties and, if so, to determine whether consistent changes in fractal features according to gestational age exist. DESIGN OF THE STUDY: One hundred nineteen fetal heart rate (FHR) recordings in 55 singleton pregnancies ...
Taylor Myles J O - - 2005
OBJECTIVES: To obtain fetal heart rate, detailed fetal electrocardiography (fECG) signals and uterine contractions during labour using a single device. DESIGN: Prospective observational study. SETTING: Delivery suite at a tertiary referral hospital, London, UK. POPULATION: Fifteen patients at median gestation of 39 weeks (range 24-41) were recruited at median cervical ...
Romano Maria - - 2006
Cardiotocography (CTG) is the most widely used diagnostic technique in clinical practice to monitor fetal health. Cardiotocographic recording also permits to assess maturation of the fetal autonomous nervous system (ANS): fetal heart rate (FHR) modifications may reveal ANS' reactions to stimuli. To assess fetal reactivity, physicians evaluate specific clinical CTG ...
Gaiser R R - - 2005
BACKGROUND: Intrathecal opioids for labor analgesia are occasionally associated with fetal heart rate abnormalities. We wanted to identify risk factors for this occurrence. METHODS: The fetal tracings of 151 consecutive patients were reviewed for the period including 30 min before and 60 min after combined spinal-epidural analgesia using intrathecal bupivacaine ...
Doubilet Peter M - - 2005
PURPOSE: To determine retrospectively the outcome of pregnancies in which the embryo has a slow heart rate at 6.0-7.0 weeks gestation and a normal heart rate at follow-up ultrasonography (US) by 8.0 weeks gestation. MATERIALS AND METHODS: Institutional review board approval was granted; informed consent was not required. The study ...
Lange S - - 2005
From adult data, it is known that numerous factors, such as age, state of the autonomic nervous system, diurnal rhythms or mean R-R interval mRR, influence heart rate variability (HRV). The aim of this study was the examination of the influence of gestational age, mRR, gender and time of day ...
Jaeggi E T - - 2005
OBJECTIVE: To review the pattern of presentation, management and outcome of fetal complete atrioventricular block (CAVB) associated with major structural congenital heart disease (CHD), when compared to isolated CAVB. METHODS: Retrospective analysis of the medical records and echocardiograms of all CAVB cases, diagnosed prenatally at two tertiary care centers between ...
Smith James F JF - - 2005
Intrapartum assessment of fetal well-being has evolved over the last 40 years, with the primary focus being fetal heart rate assessments. Despite widespread use and initial enthusiasm for the potential for heart rate monitoring to reduce fetal and neonatal mortality and morbidity, conclusive evidence of improvement in long-term outcomes is ...
Hendrix Nancy W - - 2005
An understanding of cesarean delivery for nonreassuring fetal heart rate tracing is important for several reasons. This article describes the prevalence of cesarean for nonreassuring fetal heart rate tracing and risk factors, indicates what type of fetal heart rate tracing abnormalities prompts cesarean delivery, reiterates the intrauterine resuscitation that the ...
Klauser Chad K - - 2005
OBJECTIVE: The purpose of this study was to determine the clinical role of fetal pulse oximetry to reduce cesarean delivery for a nonreassuring fetal heart rate tracing. STUDY DESIGN: Singletons > or =28 weeks were randomized to fetal pulse oximetry plus electronic fetal heart rate monitoring (monitoring + fetal pulse ...
Meijer J M - - 2005
To determine in women with surgically corrected tetralogy of Fallot the risk of pregnancy for mother and fetus, whether fertility was compromised, and the recurrence risk of congenital heart disease. Data were collected from 83 patients through interviews and review of medical records. In 29 patients 63 pregnancies were observed, ...
Sameshima Hiroshi - - 2005
We evaluated an association of nonreassuring fetal heart rate (FHR) patterns and subsequent cerebral palsy (CP) in pregnancies with intrauterine bacterial infection. Among 10,030 infants born during 1995 to 2000, 139 were complicated with acute intrauterine bacterial infection in labor. The FHR patterns 2 hours immediately before delivery were interpreted ...
Tongsong Theera - - 2005
BACKGROUND: Ductus arteriosus aneurysm is a rare fetal disorder. CASE: A 35-year-old primigravida had an uneventful antenatal course. Ultrasound examination at 30 weeks of gestation revealed hydramnios. The fetal ductus arteriosus became saccular and dilated with turbulent flow and diameter of 2.5 cm. It was located at the left upper ...
Siira Saila M - - 2005
OBJECTIVE: To assess whether intrapartum acidosis affects specific components of fetal heart rate variability. DESIGN: Prospective clinical study. SETTING: Twelve Nordic delivery units. SUBJECTS: Fetal heart rate variability was studied in 334 fetuses divided into two groups according to cord pH value: the acidotic group (cord arterial pH < 7.05 ...
Cito Giuseppe - - 2005
OBJECTIVE: The aim of the study was to determinate whether maternal position during the non-stress test (NST) in different weeks of pregnancy influences fetal heart rate patterns. MATERIALS AND METHODS: A total of 1055 NST lasting 30 min were performed in 368 autochthonous mothers with low-risk pregnancies. On the basis ...
Sherer David M - - 2005
Uterine contraction-associated accelerations of the maternal heart rate are considered to reflect both a transient contraction-related increase in cardiac output and endogenous catecholamine secretion. Uterine contraction-associated decelerations of the maternal heart rate are rare and remain unexplained. A young multiparous patient with systemic lupus erythematosus (postrenal transplant for lupus nephropathy-related ...
D'Elia A - - 2005
OBJECTIVE: To examine the effects of vibroacoustic stimulation (VAS) on fetal heart rate (FHR) in term human fetuses by computerized carditocography system. METHODS: FHR was analyzed 20 min before and 30 min after vibroacoustic stimulation using the Oxford Sonicaid System 8002 for computerized FHR measurement. Recordings were made in 31 ...
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