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Fetal doppler ultrasound

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https://www.readbyqxmd.com/read/29135072/measuring-human-placental-blood-flow-with-multidelay-3d-grase-pseudocontinuous-arterial-spin-labeling-at-3t
#1
Xingfeng Shao, Dapeng Liu, Thomas Martin, Teresa Chanlaw, Sherin U Devaskar, Carla Janzen, Aisling M Murphy, Daniel Margolis, Kyunghyun Sung, Danny J J Wang
BACKGROUND: Placenta influences the health of both a woman and her fetus during pregnancy. Maternal blood supply to placenta can be measured noninvasively using arterial spin labeling (ASL). PURPOSE: To present a multidelay pseudocontinuous arterial spin labeling (pCASL) combined with a fast 3D inner-volume gradient- and spin-echo (GRASE) imaging technique to simultaneously measure placental blood flow (PBF) and arterial transit time (ATT), and to study PBF and ATT evolution with gestational age during the second trimester...
November 14, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29130772/assessment-of-left-ventricular-function-using-the-myocardial-performance-index-in-term-fetuses-that-develop-intrapartum-compromise
#2
Amal A Alsolai, Larissa N Bligh, Ristan M Greer, Alexander Gooi, Sailesh Kumar
OBJECTIVE: To investigate the relationship between the prelabour left ventricular myocardial Performance Index (LVMPI) and intrapartum fetal compromise (IFC) in low risk term pregnancies. METHODS: A blinded, prospective observational cohort study at the Mater Mother's Hospital, Brisbane, Australia. A cohort of 284 women with uncomplicated singleton pregnancies underwent fortnightly ultrasound from 36 weeks until delivery. The LVMPI was assessed by conventional Doppler ultrasound and correlated with intrapartum outcomes...
November 12, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29121743/profiling-of-cardiovascular-and-cerebrovascular-disease-associated-microrna-expression-in-umbilical-cord-blood-in-gestational-hypertension-preeclampsia-and-fetal-growth-restriction
#3
Ilona Hromadnikova, Katerina Kotlabova, Katarina Ivankova, Yulia Vedmetskaya, Ladislav Krofta
BACKGROUND AND METHODS: Gene expression of 29 cardiovascular and cerebrovascular disease associated microRNAs was assessed in whole umbilical cord blood, compared between groups [47 gestational hypertension (GH), 56 preeclampsia (PE), 37 fetal growth restriction (FGR) and 44 normal pregnancies] and correlated with the severity of the disease with respect to clinical signs (mild PE vs. severe PE), delivery date (before and after 34weeks of gestation), and Doppler ultrasound parameters [pulsatility index (PI) in the umbilical artery, PI in the middle cerebral artery and the cerebroplacental ratio]...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29112643/assessment-of-fetal-congenital-heart-diseases-by-4-dimensional-ultrasound-using-spatiotemporal-image-correlation-pictorial-review
#4
Edward Araujo Júnior, Gabriele Tonni, Nathalie Jeanne Bravo-Valenzuela, Fabricio Da Silva Costa, Simon Meagher
The aim of this pictorial review is to describe the technical advances achieved through the application of 4-dimensional (4D) ultrasound using spatiotemporal image correlation (STIC) over conventional 2-dimensional ultrasound in the prenatal detection of congenital heart disease (CHD). Spatiotemporal image correlation is a volume imaging technique that simplifies fetal heart studies while providing more diagnostic information than is typically available from traditional 2-dimensional studies. Four-dimensional software allows the study of cardiac anatomy and function during a single cardiac cycle and has greatly contributed to diagnostic enhancement of CHD...
November 6, 2017: Ultrasound Quarterly
https://www.readbyqxmd.com/read/29110317/fetal-growth-standards-in-gastroschisis-reference-values-for-ultrasound-measurements
#5
Mariane Massaini Barbieri, João Renato Bennini, Marcelo Luís Nomura, Sirlei Siani Morais, Fernanda Garanhani Surita
OBJECTIVES: To create growth curves based on ultrasonography biometric parameters of fetuses with gastroschisis, comparing them with normal growth standards and to analyze umbilical artery (AU) Doppler velocimetry patterns. METHODS: A cohort study of 72 fetuses with gastroschisis, at gestational ages between 14 and 39 weeks was designed. Mean and standard deviation were calculated, with the 5th, 10th, 50th, 90th and 95th centiles being established for biometric parameters according to gestational age...
November 7, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29108135/regimens-of-ultrasound-surveillance-for-twin-pregnancies-for-improving-outcomes
#6
REVIEW
Jane G Woolcock, Rosalie M Grivell, Jodie M Dodd
BACKGROUND: Increased ultrasound surveillance of twin pregnancies has become accepted practice due to the higher risk of complications. There is no current consensus however as to the method and frequency of ultrasound monitoring that constitutes optimal care. OBJECTIVES: To systematically review the effects of different types and frequency of ultrasound surveillance for women with a twin pregnancy on neonatal, fetal and maternal outcomes. SEARCH METHODS: We searched Cochrane Pregnancy and Childbirth's Trials Register, ClinicalTrials...
November 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29094487/effectiveness-of-fetal-cardiac-screening-for-congenital-heart-disease-using-a-combination-of-the-four-chamber-view-and-three-vessel-view-during-the-second-trimester-scan
#7
Mina Itsukaichi, Takehiro Serikawa, Kosuke Yoshihara, Hiroshi Suzuki, Kazufumi Haino, Masayuki Yamaguchi, Takayuki Enomoto, Koichi Takakuwa
AIM: We aimed to assess the accuracy and effectiveness of fetal cardiac screening for congenital heart disease (CHD) during the second trimester by general obstetricians in a non-selected population. METHODS: In this multicenter, prospective cohort study of fetal cardiac screening, four-chamber and three-vessel views were recorded by obstetricians at 18-21 gestational weeks (GW). A total of 3005 fetuses that were scheduled for delivery at our institution were included...
November 2, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29091282/correlation-between-maternal-anxiety-reactivity-of-fetal-cerebral-circulation-to-auditory-stimulation-and-birth-outcome-in-normotensive-and-gestational-hypertensive-women
#8
Marina Vujović, Mirjana Sovilj, Ljiljana Jeličić, Miodrag Stokić, Darko Plećaš, Snežana Plešinac, Nadežda Nedeljković
This study investigated the correlation between maternal anxiety and blood flow changes through the fetal middle cerebral artery (MCA) after defined acoustic stimulation in 43 normotensive (C) and 40 gestational hypertensive (GH) subjects. Neonatal outcomes (gestational age at birth, Apgar score, birth weight) in the C and GH groups were analyzed. State (STAI-S) and trait (STAI-T) anxiety was assessed using Spielberger's questionnaire. The MCA blood flow was assessed once between 28 and 41 weeks of gestation using color Doppler ultrasound before and after application of defined acoustic stimulus...
November 1, 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/29064795/the-impact-of-emergent-infections-on-the-fetal-state
#9
Liudmyla A Vygivska, Iryna O Tuchkina, Violetta B Kalnytska
THE AIM: To study the impact of emergent infections (human herpesvirus type 6) on the fetal state. MATERIALS AND METHODS: The study involved examination of 90 pregnant women in the 2nd and 3rd trimesters of gestation (Group 1 (25 pregnant) consisted of patients with a viral infection, CMV carriers, Group 2 (25 pregnant) included women with a viral infection, herpes simplex virus types 1/2, Group 3 amounted for 20 patients with a viral infection, herpes simplex virus type 6, Group 4 comprised 20 patients with normal pregnancy and no signs of infection...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29061514/bold-mri-demonstrates-acute-placental-and-fetal-organ-hypoperfusion-with-fetal-brain-sparing-during-hypercapnia
#10
Yehuda Ginosar, Yuval Gielchinsky, Nathalie Nachmansson, Lital Hagai, Joel Shapiro, Uriel Elchalal, Rinat Abramovitch
INTRODUCTION: We evaluated changes in placental and fetal hemodynamics in rodents during acute hypercapnia using BOLD-MRI and Doppler ultrasound. METHODS: Animals were anesthetized with pentobarbital and, in consecutive 4-min periods, breathed: air, 21%O2:5%CO2, and 95%O2:5%CO2. BOLD-MRI: Pregnant ICR mice (n = 6; E17.5) were scanned in a 4.7-T Bruker Biospec spectrometer. Placenta and fetal liver, heart and brain were identified on True-FISP images...
September 11, 2017: Placenta
https://www.readbyqxmd.com/read/29060332/investigating-fetal-myocardial-function-in-heart-anomalies-by-doppler-myocardial-performance-indices
#11
Ahsan H Khandoker, Haitham M Al-Angari, F Marzbanrad, Y Kimura
Fetal myocardial performance index are used to assess aspects of systolic and diastolic function in developing fetal heart. The aim of this study was to determine normal values of fetal left ventricular (LV) Tei Index (TI) for measuring systolic performance and K-Index (KI) for diastolic performance in early (<;32 weeks), Mid (32-35 weeks) and late trimester (35-41 weeks) normal fetuses and fetuses with congenital heart diseases (CHD). Simultaneous recordings of Doppler Ultrasound Signal (DUS) of the LV outflow tracts and fetal electrocardiogram signals were obtained in 57 normal and 14 fetuses with CHD...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29053451/spatially-resolved-mr-compatible-doppler-ultrasound-proof-of-concept-for-triggering-of-diagnostic-quality-cardiovascular-mri-for-function-and-flow-quantification-at-3t
#12
Lindsey A Crowe, Gibran Manasseh, Aneta Chmielewski, Anne-Lise Hachulla, Daniel Speicher, Andreas Greiser, Hajo Muller, Thomas De Perrot, Jean-Paul Vallee, Rares Salomir
OBJECTIVES: We demonstrate the use of a Magnetic-Resonance (MR)-compatible ultrasound (US) imaging probe using spatially-resolved Doppler for diagnostic quality cardiovascular MR imaging as an initial step towards hybrid US/MR fetal imaging. METHODS: A newly developed technology for a dedicated MR-compatible phased array ultrasound-imaging probe acquired pulsed color Doppler carotid images, which were converted in near-real time to a trigger signal for cardiac cine and flow quantification MRI...
October 17, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28969484/combined-measurement-of-fetal-lung-volume-and-pulmonary-artery-resistance-index-is-more-accurate-for-prediction-of-neonatal-respiratory-distress-syndrome-in-preterm-fetuses-a-pilot-study
#13
Mohamed Laban, Ghada M Mansour, Ahmed El-Kotb, Alaa Hassanin, Zina Laban, Abdelrahman Saleh
OBJECTIVE: The objective of this study is to estimate optimal cut-off values for mean fetal lung volume (FLV) and pulmonary artery resistance index (PA-RI) as non-invasive measures to predict neonatal respiratory distress syndrome (RDS) in preterm fetuses. METHODS: A prospective study conducted at Ain Shams University Maternity Hospital, Egypt from May 2015 to July 2017: 80 eligible women diagnosed with preterm labor were recruited at 32-36 weeks' gestation. Before delivery, three-dimensional ultrasound was used to estimate FLV using virtual organ computer-aided analysis (VOCAL), while PA-RI was measured by Doppler ultrasonography...
October 12, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28960414/intra-and-inter-observer-reproducibility-of-third-trimester-uterine-artery-pulsatility-index
#14
Laura Marchi, Claudia Gaini, Chiara Franchi, Federico Mecacci, Caterina Bilardo, Lucia Pasquini
OBJECTIVES: The primary aim of the study was to investigate intra- and inter-observer reproducibility of Uterine Artery (UtA) Pulsatility Index (PI) in the third trimester of pregnancy. The secondary aim of the study was to examine whether high maternal Body Mass Index (BMI) or gestational age (GA) influence the reliability of this measurement. METHODS: Singleton pregnancies in women with known BMI were recruited between 30(+0) and 40(+0) weeks. UtA PI Doppler measurements were performed prospectively, independently and blindly by two Fetal Medicine Foundation accredited operators...
September 27, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28912727/a-hybrid-emd-kurtosis-method-for-estimating-fetal-heart-rate-from-continuous-doppler-signals
#15
Haitham M Al-Angari, Yoshitaka Kimura, Leontios J Hadjileontiadis, Ahsan H Khandoker
Monitoring of fetal heart rate (FHR) is an important measure of fetal wellbeing during the months of pregnancy. Previous works on estimating FHR variability from Doppler ultrasound (DUS) signal mainly through autocorrelation analysis showed low accuracy when compared with heart rate variability (HRV) computed from fetal electrocardiography (fECG). In this work, we proposed a method based on empirical mode decomposition (EMD) and the kurtosis statistics to estimate FHR and its variability from DUS. Comparison between estimated beat-to-beat intervals using the proposed method and the autocorrelation function (AF) with respect to RR intervals computed from fECG as the ground truth was done on DUS signals from 44 pregnant mothers in the early (20 cases) and late (24 cases) gestational weeks...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28905984/fetal-intra-abdominal-umbilical-vein-aneurysm
#16
Stefano Raffaele Giannubilo, Angela Pasculli, Alessandro Cecchi, Alessandra Biagini, Andrea Ciavattini
Importance: Fetal umbilical vein aneurysm is an uncommon anomaly that accounts for approximately 4% of umbilical cord abnormalities. The rate of intrauterine fetal death is reported to be approximately 4% to 5%, higher than the background rate of 0.7% that is generally reported during pregnancy. Objective: The aim of this study was to review the pathophysiology, diagnosis, and clinical management of fetal umbilical vein aneurysm. Evidence Acquisition: Advances in high-resolution ultrasound combined with color Doppler and 3-dimensional rendering have contributed to an increased understanding of the fetal venous circulation in recent years...
September 2017: Obstetrical & Gynecological Survey
https://www.readbyqxmd.com/read/28869420/improved-ultrasound-transducer-positioning-by-fetal-heart-location-estimation-during-doppler-based-heart-rate-measurements
#17
Paul Hamelmann, Rik Vullings, Lars Schmitt, Alexander Franciscus Kolen, Massimo Mischi, Judith O E H Van Laar, Jan W M Bergmans
Doppler Ultrasound (US) is the most commonly applied method to measure the fetal heart rate (fHR). When the fetal heart is not properly located within the ultrasonic beam, fHR measurements often fail. As a consequence, clinical staff needs to reposition the US transducer on the maternal abdomen, which can be a time consuming and tedious task. In this article, a method is presented to aid clinicians with the positioning of the US transducer to produce robust fHR measurements. A maximum likelihood estimation (MLE) algorithm is developed, which provides information on fetal heart location using the power of the Doppler signals received in the individual elements of a standard US transducer for fHR recordings...
September 4, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28859279/the-superovulated-environment-independent-of-embryo-vitrification-results-in-low-birthweight-in-a-mouse-model
#18
Rachel Weinerman, Teri Ord, Marisa S Bartolomei, Christos Coutifaris, Monica Mainigi
Epidemiological studies suggest that babies born following in vitro fertilization (IVF) and fresh embryo transfer are of lower birthweight than babies born following frozen embryo transfer, although the mechanism responsible for this phenotype is not known. We developed a novel mouse model that isolates the independent effects of embryo freezing and the superovulated environment, which cannot be performed in humans. We transferred blastocysts that had been vitrified and warmed, mixed with with fresh blastocysts, into individual pseudopregnant recipients produced by either natural mating or mating following injection with equine chorionic gonadotropin and human chorionic gonadotropin and hCG (superovulation)...
July 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28837134/clinician-performed-ultrasound-in-fetal-growth-restriction-fetal-neonatal-and-pediatric-aspects
#19
A Sehgal, F Crispi, M R Skilton, W-P de Boode
Fetal growth restriction (FGR) affects 7-10% pregnancies. Conventional and tissue Doppler imaging has noted cardiac compromise during fetal and early neonatal periods in this cohort. In this article, we discuss the use of salient ultrasound parameters across age groups. During fetal life, certain feto-placental sonographic parameters have been linked to adverse perinatal outcomes and are predictive of later life hypertension. During the early postnatal period altered morphometry (hypertrophied and globular hearts) with sub-clinical impairment of cardiac function has been noted in both term and preterm infants with FGR...
August 24, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28809063/color-and-power-doppler-combined-with-fetal-intelligent-navigation-echocardiography-fine-to-evaluate-the-fetal-heart
#20
L Yeo, R Romero
OBJECTIVE: To evaluate the performance of color and bidirectional power Doppler ultrasound combined with Fetal Intelligent Navigation Echocardiography (FINE) in examining the fetal heart. METHODS: A prospective cohort study was conducted of fetuses in the second and third trimesters with a normal heart or with congenital heart disease (CHD). One or more spatiotemporal image correlation (STIC) volume datasets, combined with color or bidirectional power Doppler (S-flow) imaging, were acquired in the apical four-chamber view...
October 2017: Ultrasound in Obstetrics & Gynecology
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