Read by QxMD icon Read

Middle cerebral artery doppler

Qinghai Peng, Shi Zeng, Qichang Zhou, Wen Deng, Tao Wang, Ya Tan, Yushan Liu
To observe Doppler changes in the three main cerebral arteries in fetuses with congenital heart defects (CHDs). The pulsatility index (PI) values of the anterior cerebral artery (ACA), middle cerebral artery (MCA), and posterior cerebral artery (PCA) were prospectively compared in 78 CHD fetuses and 78 normal control fetuses. Correlations between the cerebral artery PIs and the neurodevelopment scores (psychomotor development index [PDI] and mental development index [MDI]) were assessed. The MCA-PI was decreased significantly in fetuses with hypoplastic left heart syndrome (HLHS)...
March 14, 2018: Scientific Reports
Mert Ozan Bahtiyar, Emre Ekmekci, Emine Demirel, Roxanna A Irani, Joshua A Copel
Monochorionic twin pregnancies are at risk of unique complications due to placental sharing and vascular connections between placental territories assigned for each twin. Twin anemia-polycythemia sequence (TAPS) is an infrequent but potentially dangerous complication of abnormal placental vascular connections. TAPS occurs due to very-small-caliber (< 1 mm) abnormal placental vascular connections which lead to chronic anemia in the donor twin and polycythemia in the recipient twin. TAPS may occur spontaneously or following fetoscopic laser photocoagulation of communicating placental vessels for twin-twin transfusion syndrome...
March 13, 2018: Fetal Diagnosis and Therapy
Zahra Laleh Eslamian, Elahe Zarean, Maryam Moshfeghi, Zahra Heidari
Background: Early prediction of adverse neonatal outcome would be possible by Doppler impedance indices of middle cerebral artery (MCA), umbilical artery (UmA), and descending aortal artery (AO) that result in decrease neonatal morbidity and mortality rate. The aim of the present study was a determination of optimal value for the ratio of MCA to descending aorta blood flow (MCA/AO) impedance indices and its comparison with the ratio of MCA to UmA (MCA/UmA) impedance indices and their relationship with neonatal outcome...
2018: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
Angela E Rankine-Mullings, Nadine Morrison-Levy, Deanne Soares, Karen Aldred, Lesley King, Susanna Ali, Jennifer M Knight-Madden, Margaret Wisdom-Phipps, Robert J Adams, Russell E Ware, Marvin Reid
This study investigated the association of nutritional and haematological variables with maximum time-averaged mean velocity (TAMV) measured by transcranial Doppler (TCD) velocity and the agreement of classification between two protocols. TCD categories included: normal (<170 cm/s), conditional (170-199 cm/s) and abnormal (≥200 cm/s) based on TAMV in distal internal carotid artery (dICA), middle cerebral artery (MCA), internal carotid bifurcation, anterior and posterior cerebral arteries. Of 358 children with sickle cell anaemia (SCA) examined, the mean age (±standard deviation) was 7·4 ± 2·7 years; 13·1% and 6·7% had conditional and abnormal velocities, respectively...
March 5, 2018: British Journal of Haematology
Michael Furian, Sara E Hartmann, Tsogyal D Latshang, Deborah Flueck, Christian Murer, Philipp M Scheiwiller, Batyr Osmonov, Silvia Ulrich, Malcolm Kohler, Marc J Poulin, Konrad E Bloch
BACKGROUND: Effects of hypobaric hypoxia at altitude on exercise performance of lowlanders with chronic obstructive pulmonary disease (COPD) have not been studied in detail. OBJECTIVES: To quantify changes in exercise performance and associated physiologic responses in lowlanders with COPD travelling to moderate altitude. METHODS: A total of 31 COPD patients with a median age (quartiles) of 66 years (59; 69) and FEV1 of 56% predicted (49; 69) living below 800 m performed a constant-load bicycle exercise to exhaustion at 60% of the maximal work rate at 490 m (Zurich) and at an identical work rate at 2,590 m (Davos) in randomized order...
March 2, 2018: Respiration; International Review of Thoracic Diseases
Sharon L Cheatham, Joanne L Chisolm, Nicole O'Brien
Hypoplastic left heart syndrome (HLHS) palliation may result in altered cerebral blood flow with subsequent neurodevelopmental implications. The purpose of the study was to assess blood flow in the middle cerebral artery (MCA) and investigate the relationship with early neurodevelopmental outcomes in infants with HLHS after hybrid stage I. Transcranial Doppler (TCD) was performed to obtain peak systolic, end-diastolic, and mean velocities, as well as pulsatility index of the MCA in infants with HLHS (n = 18) at baseline and at 2, 4, and 6 months of age...
March 2, 2018: Pediatric Cardiology
Jean-Philippe Desilles, Varouna Syvannarath, Lucas Di Meglio, Célina Ducroux, William Boisseau, Liliane Louedec, Martine Jandrot-Perrus, Jean-Baptiste Michel, Mikael Mazighi, Benoît Ho-Tin-Noé
BACKGROUND: Previous experimental studies have shown that downstream microvascular thromboinflammation is involved in brain damage from acute ischemic stroke. Using intravital microscopy, we investigated and characterized the sequence of downstream microvascular thromboinflammation in an ischemia/reperfusion acute ischemic stroke model. METHODS AND RESULTS: Rats underwent transient monofilament middle cerebral artery (MCA) occlusion. Cerebral microcirculation in the MCA territory was exposed through a craniotomy and analyzed using real-time intravital imaging coupled with laser Doppler interferometry...
March 1, 2018: Journal of the American Heart Association
Tawana Vicente Bertagnolli, Michelle de Souza Rangel Machado, Cristine Jorge Homsi Ferreira, Jackeline de Souza Rangel Machado, Geraldo Duarte, Ricardo Carvalho Cavalli
OBJECTIVE: To assess the feasibility and safety of a physiotherapy protocol applied to pregnant women with preeclampsia. METHODS: Randomized, controlled, single-blind feasibility study, with 24 hospitalized pregnant women with preeclampsia. The intervention group received one session of the physiotherapy. The control group remained under the routine care of the hospital. The primary outcomes were Doppler velocimetry, cardiotocography, and maternal-fetal hemodynamics...
March 1, 2018: Hypertension in Pregnancy
Cihan Inan, N Cenk Sayin, Zehra N Dolgun, Selen G Erzincan, Isil Uzun, Havva Sutcu, Necdet Sut, Fusun G Varol
OBJECTIVE: To evaluate the possible effects of prenatal steroid administration on Doppler parameters of the umbilical artery, uterine artery, middle cerebral artery, and ductus venosus, the cerebroplacental ratio, and the amniotic fluid index in preterm fetuses. METHODS: The present prospective observational study was performed at the Perinatology Department of Trakya University, Edirne, Turkey, between June 1, 2015, and September 1, 2016. It included patients with healthy singleton pregnancies who had received betamethasone at 24-34 weeks of pregnancy...
March 1, 2018: International Journal of Gynaecology and Obstetrics
Alexander D Wright, Jonathan D Smirl, Kelsey Bryk, Paul van Donkelaar
OBJECTIVE: To determine whether acute sports-related concussion (SRC) exerts differential effects on cerebral autoregulatory properties during systole versus diastole. MATERIALS AND METHODS: One hundred and thirty-six contact-sport athletes tested preseason; 14 sustained a concussion and completed follow-up testing at 72 hours, 2 weeks, and 1 month post-injury. Five minutes of repetitive squat-stand maneuvers induced blood pressure (BP) oscillations at both 0.05 and 0...
2018: Acta Neurochirurgica. Supplement
Solventa Krakauskaite, Corey Thibeault, James LaVangie, Mateo Scheidt, Leo Martinez, Danielle Seth-Hunter, Amanda Wu, Michael O'Brien, Fabien Scalzo, Seth J Wilk, Robert B Hamilton
OBJECTIVE: To determine normal ranges for traditional transcranial Doppler (TCD) measurements for two age groups (14-19 and 20-29 years) and compare to existing literature results. The development of a normal range for TCD measurements will be required for the development of diagnostic and prognostic tests in the future. MATERIALS AND METHODS: We performed TCD on the middle cerebral artery on 147 healthy subjects aged 18.9 years (SD = 2.1) and calculated mean cerebral blood flow velocity (mCBFV) and pulsatility index (PI)...
2018: Acta Neurochirurgica. Supplement
Jonathan D Smirl, Alexander D Wright, Philip N Ainslie, Yu-Chieh Tzeng, Paul van Donkelaar
OBJECTIVE: Cerebral pressure-flow dynamics are typically reported between mean arterial pressure and mean cerebral blood velocity. However, by reporting only mean responses, potential differential regulatory properties associated with systole and diastole may have been overlooked. MATERIALS AND METHODS: Twenty young adults (16 male, age: 26.7 ± 6.6 years, BMI: 24.9 ± 3.0 kg/m2 ) were recruited for this study. Middle cerebral artery velocity was indexed via transcranial Doppler...
2018: Acta Neurochirurgica. Supplement
Alex O Trofimov, George Kalentyev, Oleg Voennov, Michail Yuriev, Darya Agarkova, Svetlana Trofimova, Vera Grigoryeva
OBJECTIVE: The aim was to evaluate changes in cerebrovascular resistance (CVR) in combined traumatic brain injury (CTBI) in groups with and without intracranial hematomas (IH). MATERIALS AND METHODS: Treatment outcomes in 70 patients with CTBI (42 males and 28 females) were studied. Mean age was 35.5 ± 14.8 years (range, 15-73). The patients were divided into two groups: group 1 included 34 CTBI patients without hematomas; group 2 comprised 36 patients with CTBI and IH...
2018: Acta Neurochirurgica. Supplement
Aparna Kulkarni, Patricia Garcia-Cañadilla, Abdullah Khan, Jose Miguel Lorenzo, Karen Beckerman, Brenda Valenzuela-Alcaraz, Monica Cruz-Lemini, Olga Gomez, Eduard Gratacos, Fatima Crispi, Bart Bijnens
AIMS: Myocardial structural and functional abnormalities are known to occur in fetuses of mothers with diabetes mellitus (FMDM). The main aim of this investigation was to explore the cardiovascular circulatory patterns in FMDM using a validated lumped computational model of the cardiovascular system. METHODS: This was a multi-institutional study involving FMDM compared to fetuses of maternal controls (FC). Fetal echocardiographic Doppler data from left and right ventricular outflow tracts, aortic isthmus, middle cerebral and umbilical arteries were fitted into a validated fetal circulation computational model to estimate patient-specific placental and vascular properties...
March 2018: Placenta
Marcus Thudium, Ingo Heinze, Richard K Ellerkmann, Tobias Hilbert
BACKGROUND: Postoperative neurological injury still represents a major cause of morbidity after cardiac surgery. Our objective was to compare the limits as well as advantages of routine monitoring tools for the detection of cerebral function and perfusion deficits during cardiopulmonary bypass in a daily clinical setting. METHODS: Adult patients undergoing elective cardiac surgery with use of cardiopulmonary bypass were included. Patients received monitoring comprising Bispectral Index (BIS), Near Infrared Spectroscopy (NIRS) and assessment of middle cerebral artery flow velocity (MCAV) using transcranial Doppler (TCD) sonography...
January 31, 2018: Heart Surgery Forum
Alexander D Wright, Jonathan D Smirl, Kelsey Bryk, Michael Jakovac, Paul van Donkelaar
OBJECTIVE: To determine the effects of repetitive subconcussive head trauma on neurovascular coupling (NVC) responses. DESIGN: Prospective cohort study collected between September 2013 and December 2016. SETTING: University laboratory. PARTICIPANTS: One hundred seventy-nine elite, junior-level (age, 19.6 ± 1.5 years) contact sport (ice hockey, American football) athletes recruited for preseason testing. Fifty-two nonconcussed athletes returned for postseason testing...
February 14, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Casandra I Montoro Aguilar, Stefan Duschek, Gustavo A Reyes Del Paso
This study explored the influence of certain personality traits (neuroticism, extraversion, psychoticism, alexithymia), emotional variables (depression, catastrophizing), and insomnia on cerebral blood flow (CBF) responses to painful stimulation in fibromyalgia, using functional transcranial Doppler sonography. CBF velocities were recorded bilaterally in the anterior cerebral arteries (ACA) and middle cerebral arteries (MCA) of 24 fibromyalgia patients during exposure to two painful pressure conditions: (1) fixed pressure (2...
February 19, 2018: Scandinavian Journal of Psychology
Stephen Ball, Sarah Al-Bachari, Laura M Parkes, Hedley C A Emsley, Charles N McCollum
OBJECTIVE: Idiopathic Parkinson's disease (IPD) is the second most common neurodegenerative disorder, often complicated by dementia. Cardiovascular risk factors and spontaneous cerebral emboli (SCE) are strongly associated with Alzheimer's (AD) and vascular dementia (VaD). We measured SCE in the middle cerebral artery and arterial wall volume in the extracranial arteries in patients with IPD and controls, and explored the relationships with structural and physiological MRI brain neurovascular measures...
February 10, 2018: Clinical Neurology and Neurosurgery
M Rial-Crestelo, R J Martinez-Portilla, A Cancemi, J Caradeux, L Fernandez, A Peguero, E Gratacos, Francesc Figueras
OBJECTIVES: To determine the added value of cerebroplacental ratio (CPR) and uterine Doppler velocimetry at third trimester scan in an unselected obstetric population to predict smallness and growth restriction. METHODS: We constructed a prospective cohort study of women with singleton pregnancies attended for routine third trimester screening (32 +0 -34 +6 weeks). Fetal biometry and fetal-maternal Doppler ultrasound examinations were performed by certified sonographers...
February 15, 2018: Journal of Maternal-fetal & Neonatal Medicine
Xiaohong Wu, Li Wang, Jingxin Zhong, Jacky Ko, Lin Shi, Yannie Soo, Thomas Leung, Ka Sing Wong, Jill Abrigo, Xiangyan Chen
PURPOSE: Intracranial artery calcification (IAC) has been demonstrated to be correlated with ischemic stroke, cognitive decline, and other vascular events by accumulating evidences from both Western and Asian populations. The proposed study aimed to investigate its potential mechanisms by evaluating the blood flow velocity and pulsatility index (PI) of cerebral arteries. METHODS: Consecutive ischemic stroke patients admitted to the Prince of Wales Hospital were recruited after excluding those with atrial fibrillation or poor temporal window...
February 9, 2018: Neuroradiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"