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Middle cerebral artery doppler

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https://www.readbyqxmd.com/read/28730452/transcranial-color-doppler-in-stroke-free-adult-patients-with-sickle-cell-disease
#1
G Graziadei, F M Casoni, F Annoni, I Cortinovis, P Ridolfi, I Gandolfi, A Marcon, E Di Pierro, M D Cappellini
The threshold velocity ≥200 cm/s at transcranial Doppler (TCD) evaluation is a useful cut-off for preventing the stroke (STOP trial) in pediatric patients with sickle cell disease (SCD), term including different types of sickle genotypes. Scanty data are available for adult SCD patients. We compared intracranial blood flow velocities between adult SCD patients and controls using transcranial color Doppler (TCCD), measuring the peak of systolic velocity (PSV) with the insonation angle correction and the pulsatility index (PI), an indicator of endothelial elasticity...
July 20, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28728785/operative-strategies-to-reduce-cerebral-embolic-events-during-on-and-off-pump-coronary-artery-bypass-surgery-a-stratified-prospective-randomized-trial
#2
Michael E Halkos, Aaron Anderson, Jose Nilo G Binongo, Anthony Stringer, Yi Lasanajak, Vinod H Thourani, Omar M Lattouf, Robert A Guyton, Kim T Baio, Eric Sarin, William B Keeling, N Renee Cook, Katherine Carssow, Alexis Neill, Kathryn E Glas, John D Puskas
OBJECTIVE: To determine the impact of different aortic clamping strategies on the incidence of cerebral embolic events during coronary artery bypass grafting (CABG). METHODS: Between 2012 and 2015, 142 patients with low-grade aortic disease (epiaortic ultrasound grade I/II) undergoing primary isolated CABG were studied. Those undergoing off-pump CABG were randomized to a partial clamp (n = 36) or clampless facilitating device (CFD; n = 36) strategy. Those undergoing on-pump CABG were randomized to a single-clamp (n = 34) or double-clamp (n = 36) strategy...
June 16, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28713510/color-doppler-indices-of-proximal-and-distal-parts-of-middle-cerebral-artery-in-fetuses-with-intrauterine-growth-restriction
#3
Farhad Naleini, Mohammad Farzizadeh, Abdolmajid Taheri, Ayoob Rostamzadeh, Daryoush Fatehi
INTRODUCTION: Intrauterine growth restriction (IUGR) is a major clinical issue for pregnant women. The purpose of this study was to evaluate color Doppler indices of the proximal and distal parts of the middle cerebral artery (MCA) of the fetus. METHODS: In this cross-sectional study, 350 pregnant patients, with gestation age of 32-40 who were suspected to have intrauterine growth restriction, participated. The patients were referred for color Doppler sonography at the Imam Reza Hospital (Kermanshah, Iran) from May 2011 to September 2012...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28708272/prognostic-accuracy-of-cerebroplacental-ratio-and-middle-cerebral-artery-doppler-for-adverse-perinatal-outcomes-a-systematic-review-and-meta-analysis
#4
REVIEW
Charlotte A Schreurs, Marjon A de Boer, Martijn W Heymans, Linda J Schoonmade, Patrick M M Bossuyt, Ben Willem J Mol, Christianne J M de Groot, Caroline J Bax
OBJECTIVE: Ultrasonographic assessment of the cerebroplacental ratio (CPR) and middle cerebral artery (MCA) Doppler is widely used as an additional method to umbilical artery (UA) Doppler to identify fetuses at risk of adverse perinatal outcomes. However, reported estimates of its accuracy vary considerably. We conducted a systematic review with meta-analysis of studies on the prognostic accuracy of CPR and MCA Doppler, and compared this to UA Doppler. METHODS: We queried PubMed, EMBASE, the Cochrane Library, and ClinicalTrials...
July 14, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28708246/three-dimensional-power-doppler-evaluation-of-cerebral-vascular-blood-flow-a-novel-tool-in-the-assessment-of-fetal-growth-restriction
#5
Katherine R Goetzinger, Alison G Cahill, Linda Odibo, George A Macones, Anthony O Odibo
OBJECTIVES: To determine whether fetuses with fetal growth restriction (FGR) are more likely to have abnormal cerebral vascular flow patterns compared to fetuses who are appropriate for gestational age (AGA) when quantified by using 3-dimensional (3D) power Doppler ultrasound. METHODS: We conducted a prospective cohort study of singleton gestations presenting for growth ultrasound examination between 24 and 36 weeks' gestation. Patients with FGR (estimated fetal weight < 10th percentile) were enrolled and matched 1:1 for gestational age (±7 days) with AGA fetuses...
July 14, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28707059/a-prospective-cohort-study-on-the-prediction-of-fetal-distress-and-neonatal-status-with-arterial-and-venous-doppler-measurements-in-appropriately-grown-term-fetuses
#6
Ihsan Atabay, Semir Kose, Erkan Cagliyan, Bora Baysal, Ebru Yucesoy, Sabahattin Altunyurt
PURPOSE: To assess the predictive power of the cerebro-placental ratio (CPR) and the venous-arterial index (VAI) for the development of intrapartum fetal distress (FD) and neonatal intensive care unit (NICU) admission. METHODS: Fetal umbilical artery, middle cerebral artery and umbilical vein Doppler measurements were obtained before the active phase of labor in 311 singleton pregnancies at ≥37 weeks. A continuous electronic fetal monitorization was applied, and an umbilical cord blood sample was obtained for each participant...
July 13, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28704875/sonographic-and-doppler-sonographic-diagnosis-of%C3%A2-neonatal-ischemic-stroke
#7
Karl-Heinz Deeg
Children are particularly at risk for stroke in the neonatal period. 1/3 of all strokes in children occur during the perinatal period. The incidence of perinatal stroke is 1:4000. A differentiation is made between ischemic stroke and hemorrhagic stroke. Ischemic strokes are caused by arterial occlusion due to thrombosis or embolism. As a result of the nonspecific clinical symptoms in this age group, diagnosis is usually made too late. The only relatively specific symptom is focal cerebral seizure during the first week of life...
July 13, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28700818/fetal-mca-doppler-to-time-intrauterine-transfusions-in-red-cell-alloimmunisation-a-randomised-trial
#8
Jodie M Dodd, Chad Andersen, Jan E Dickinson, Jennie Louise, Andrea Deussen, Rosalie M Grivell, Liliana Voto, Mark D Kilby, Rory Windrim, Greg Ryan
OBJECTIVES: Red cell alloimmunisation affects up to 0.6% of all live births, and can be successfully treated with intrauterine fetal blood transfusion. Fetal middle cerebral artery (MCA) Doppler peak systolic velocity (PSV) is a non-invasive test, to identify fetal anaemia and requiring intrauterine transfusion (IUT). Traditionally, timing of subsequent IUTs has involved estimating a fall in fetal haematocrit of 1% per day, or a fall in fetal haemoglobin of 0.3 g/dL per day. The aim of this pragmatic multi-centre randomised trial was to evaluate whether Doppler MCA-PSV in the fetus that has undergone one IUT for anaemia secondary to red cell alloimmunisation was non-inferior to timing IUT by timing based on predicting the fall in fetal haematocrit or fetal haemoglobin, without compromising infant haemoglobin at birth...
July 12, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28700720/altered-cerebral-blood-flow-velocity-features-in-fibromyalgia-patients-in-resting-state-conditions
#9
Alejandro Rodríguez, José Tembl, Patricia Mesa-Gresa, Miguel Ángel Muñoz, Pedro Montoya, Beatriz Rey
The aim of this study is to characterize in resting-state conditions the cerebral blood flow velocity (CBFV) signals of fibromyalgia patients. The anterior and middle cerebral arteries of both hemispheres from 15 women with fibromyalgia and 15 healthy women were monitored using Transcranial Doppler (TCD) during a 5-minute eyes-closed resting period. Several signal processing methods based on time, information theory, frequency and time-frequency analyses were used in order to extract different features to characterize the CBFV signals in the different vessels...
2017: PloS One
https://www.readbyqxmd.com/read/28695721/aortic-isthmus-shunt-dynamics-in-normal-and-complicated-monochorionic-pregnancies
#10
Viola Seravalli, Dana Block-Abraham, Cyrethia McShane, Sarah Millard, Ahmet Baschat, Jena Miller
OBJECTIVE: To study fetal aortic isthmus (AoI) shunt dynamics in monochorionic (MC) twins. METHODS: Normal and complicated MC pregnancies were prospectively enrolled. The relationship of isthmus flow index (IFI) with Doppler parameters of umbilical artery (UA), descending aorta (DAo), middle cerebral artery (MCA), and ductus venosus (DV), and with left and right ventricular cardiac output and stroke volume was studied. RESULTS: The IFI was obtained in 180 examinations from 48 pregnancies (24 twin-twin-transfusion syndrome, TTTS; 4 selective intrauterine growth restriction, sIUGR; 12 TTTS+sIUGR; 8 uncomplicated)...
July 11, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28687500/analysis-of-hemodynamic-changes-in-early-stage-after-carotid-stenting-by-transcranial-doppler-a-preliminary-study
#11
Ziguang Yan, Min Yang, Guochen Niu, Yinghua Zou
BACKGROUND: Cerebral hyperperfusion syndrome (CHS) or hemodynamic instability(HI), caused by the hemodynamic changes, often occur within 6 hours after carotid artery stenting (CAS) The post-procedure cerebral hemodynamic change in the early phase, less than 6 hours after CAS, is largely unknown. In this study we evaluated the cerebral hemodynamic changes in patients after CAS using transcranial Doppler (TCD). METHODS: From January, 2013 to July, 2014, medical records of 61 patients underwent CAS were reviewed retrospectively...
July 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28680306/changes-in-cerebral-blood-flow-in-patients-with-familial-mediterranean-fever
#12
Gözde Çetin, Uygar Utku, Nurhan Atilla, Kadir Gişi, Mehmet Sayarlioğlu
INTRODUCTION: It is known that there is a relationship between systemic inflammation and atherosclerosis. Atherosclerosis is one of the best-known causes of cerebrovascular diseases. The aim of this study was to assess cerebral blood flow velocity using transcranial Doppler (TCD) ultrasonography in patients with familial Mediterranean fever (FMF). METHODS: A total of 30 patients aged from 20 to 50 years with FMF were enrolled in the FMF group consecutively. The control group (non-FMF group) consisted of 30 age- and sex-matched randomly selected patients without FMF who had other diagnoses such as fibromyalgia and did not have risk factors for atherosclerosis...
June 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28678308/evaluation-function-of-transcranial-two-dimensional-and-color-doppler-ultrasonography-tccs-for-patients-with-different-degrees-of-cerebral-vasospasm-before-and-after-the-nimodipine-treatment
#13
J-L Wang, X-N Li, Y-H Zhang, X Li, Y-L Yang
OBJECTIVE: To evaluate the changes in cerebral hemodynamics of patients with different degrees of cerebral vasospasm before and after the nimodipine treatment using transcranial two-dimensional and color Doppler ultrasonography (TCCS). PATIENTS AND METHODS: A total of 77 patients with subarachnoid hemorrhage was collected; and the maximum peak systolic velocity (Vs), end diastolic velocity (Vd), time averaged maximum velocity (Vm), pulsatility index (PI) and resistance index (RI) of middle cerebral artery (MCA) were measured by spectral Doppler technique...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28648573/personalized-treatment-with-immunoadsorption-and-intravenous-immunoglobulin-in-a-case-of-severe-rh-alloimmunization-during-pregnancy-unresponsive-to-plasma-exchange
#14
Anna Colpo, Tiziana Tison, Maria Teresa Gervasi, Cinzia Vio, Maria Vicarioto, Giustina De Silvestro, Piero Marson
INTRODUCTION: Despite prophylaxis, a small proportion of RhD-negative women may develop anti-D antibodies after a sensitizing event occurring during pregnancy or delivery of a D-positive baby. Intrauterine transfusion (IUT) is the treatment of choice in case of fetal anemia, but it cannot be performed early during pregnancy. Combined treatment with therapeutic plasma-exchange (TPE) and intravenous immunoglobulin (IVIG) can avoid or delay IUT. Immunoadsorption (IA) could represent a more effective treatment in selected cases...
June 6, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28648116/emboli-and-cognitive-state-in-surgical-vs-transcatheter-aortic-valve-replacement
#15
Tom Friedman, Oved Cohen, Avishai Ziser, Arthur Kerner, Keren Bitton-Worms, Gil Bolotin
Background Neurologic complications and neurocognitive impairment due to cerebral emboli are common following heart surgery. This study aimed to compare the number of emboli detected in the middle cerebral artery in open aortic valve replacement, apical and femoral transcatheter aortic valve replacement, and also to test for an association between the number of emboli captured in each procedure and changes in the patient's cognitive state. Methods Forty-four patients were enrolled in the study, 36 of whom were included in the final analyses: 14 underwent open aortic valve replacement, 2 had femoral transcatheter aortic valve replacement, and 10 had apical transcatheter aortic valve replacement...
January 1, 2017: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/28637734/pregnancy-specific-stress-fetoplacental-haemodynamics-and-neonatal-outcomes-in-women-with-small-for-gestational-age-pregnancies-a-secondary-analysis-of-the-multicentre-prospective-observational-trial-to-optimise-paediatric-health-in-intrauterine-growth-restriction
#16
Terri A Levine, Ruth E Grunau, Ricardo Segurado, Sean Daly, Michael P Geary, Mairead M Kennelly, Keelin O'Donoghue, Alyson Hunter, John J Morrison, Gerard Burke, Patrick Dicker, Elizabeth C Tully, Fergal D Malone, Fiona A Alderdice, Fionnuala M McAuliffe
OBJECTIVES: To examine associations between maternal pregnancy-specific stress and umbilical (UA PI) and middle cerebral artery pulsatility indices (MCA PI), cerebroplacental ratio, absent end diastolic flow (AEDF), birthweight, prematurity, neonatal intensive care unit admission and adverse obstetric outcomes in women with small for gestational age pregnancies. It was hypothesised that maternal pregnancy-specific stress would be associated with fetoplacental haemodynamics and neonatal outcomes...
June 21, 2017: BMJ Open
https://www.readbyqxmd.com/read/28635180/renal-vascularization-indexes-and-fetal-hemodynamics-in-fetuses-with-growth-restriction
#17
Giovana Farina Doro, Janaína Campos Senra, Agatha Sacramento Rodrigues, Seizo Miyadahira, Renata Lopes Ribeiro, Rossana Pulcinelli Vieira, Lisandra Stein Bernardes
OBJECTIVE: To identify the correlation between the renal vascularization index (VI), the flow index (FI) and the vascularization and flow index (VFI) and placental and fetal hemodynamics in fetuses with growth restriction. METHOD: Bidimensional ultrasound and three-dimensional power Doppler with the VOCAL technique were used to determine the renal vascular indexes and fetal and placental hemodynamics in fetuses below the 10(th) percentile for fetal weight. Partial correlation analysis (controlled for renal depth and gestational age) was performed...
June 20, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28627298/a-prospective-transcranial-doppler-ultrasound-based-evaluation-of-the-acute-and-cumulative-effects-of-sport-related-concussion-on-neurovascular-coupling-response-dynamics
#18
Alexander D Wright, Jonathan D Smirl, Kelsey Bryk, Paul van Donkelaar
Sport-related concussion has been shown to alter cerebral blood flow (CBF) both acutely and chronically, and may exert cumulative effects across multiple injuries. Such dysfunction may be mediated by trauma-induced deficits to CBF control mechanisms, though our understanding of these effects is limited, including dynamics of neurovascular coupling (NVC) responses (i.e. CBF responses to neurologic demand). 179 junior-level contact sport athletes completed preseason testing - 42 reported never having experienced a concussion (Hx-) while 31 had endured three or more (Hx3+)...
June 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28611933/monochorionic-triamniotic-triplet-pregnancy-complicated-by-twin-reversed-arterial-perfusion-sequence-case-report-and-literature-review
#19
Pingshan Pan, Guoyang Luo, Lu Tang, Jeanne D Rolle, Yuqin Qin, Quan Zeng, Jiangting Wei, Yuanfang Chen, Hongwei Wei
Background  Monochorionic-triamniotic pregnancies are rare and fraught with complications. Case  A case of monochorionic-triamniotic triplet pregnancy complicated by twin reversed arterial perfusion (TRAP) sequence is presented. The patient declined termination or selective fetal reduction. Triplet C was acardiac. At 24 weeks, triplet B developed polyhydramnios. At 30 weeks, polyhydramnios was seen in all three amniotic sacs, but without signs of fetal hydrops and with normal Doppler velocimetry measurements in the umbilical artery, middle cerebral artery, and ductus arteriosus of triplets A and B...
April 2017: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/28608454/accelerated-atherosclerosis-in-anca-associated-vasculitis
#20
I González-Suárez, J J Ríos-Blanco, J Arpa
OBJECTIVES: Cardiovascular disease, including myocardial infarction and stroke, is a major cause of mortality in ANCA-associated vasculitis (AAV). Although AAV affects small vessels, an accelerated atherosclerosis not explained by traditional cardiovascular risk factors (CVRF) has been demonstrated. We aimed to investigate the association of atherosclerosis measured by carotid intima-media thickness (CIMT) and cerebral small vessel disease in AAV-patients. MATERIALS & METHODS: Twenty-three AAV-patients in complete remission were recruited...
June 12, 2017: Acta Neurologica Scandinavica
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