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Carotid doppler

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https://www.readbyqxmd.com/read/28432709/a-new-modality-for-the-estimation-of-corrected-flow-time-via-electrocardiography-as-an-alternative-to-doppler-ultrasonography
#1
Hooman Hossein-Nejad, Payam Mohammadinejad, Atefeh Zeinoddini, Seyedhossein Seyedhosseini Davarani, Mohsen Banaie
BACKGROUND: Evaluation of corrected flow time (FTc) via ultrasonography is one of the suggested modalities for the assessment of intravascular volume status. This study aimed to compare the results of FTc of carotid artery measured via ultrasonography, as a measure of mechanical outcome of the cardiac cycle, with the results of FTc estimation from a new modified formula via electrocardiography (ECG), as a measure of electrical function of the cardiac cycle. METHODS: Healthy volunteers were evaluated before and after a passive leg raising (PLR) maneuver...
April 22, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28431600/assessment-of-on-treatment-platelet-reactivity-and-relationship-with-cerebral-micro-embolic-signals-in-asymptomatic-and-symptomatic-carotid-stenosis
#2
Justin A Kinsella, W Oliver Tobin, Sean Tierney, Timothy M Feeley, Bridget Egan, Tara Coughlan, D Ronan Collins, Desmond O'Neill, Joseph A Harbison, Colin P Doherty, Prakash Madhavan, Dermot J Moore, Sean M O'Neill, Mary-Paula Colgan, Maher Saqqur, Raymond P Murphy, Niamh Moran, George Hamilton, Dominick J H McCabe
INTRODUCTION: The relationship between on-treatment platelet reactivity and cerebral micro-embolic signals (MES) is unknown, and has not been previously simultaneously assessed in asymptomatic and symptomatic carotid stenosis patients. METHODS: Consecutive eligible patients with ≥50% asymptomatic or recently symptomatic carotid stenosis (≤4weeks following TIA/ischaemic stroke) were recruited to this pilot study. Symptomatic patients were followed up to the 'late' phase (≥3months) following symptom onset or carotid intervention; longitudinal data were analysed from symptomatic patients with data available at both time-points...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28429475/common-carotid-artery-sonography-versus-transthoracic-echocardiography-for-cardiac-output-measurements-in-intensive-care-unit-patients
#3
Qian-Yi Peng, Li-Na Zhang, Mei-Lin Ai, Li Li, Cheng-Huan Hu, Yan-Xin Zhang, Wei Liu, Qing Feng, Yu Zou, Yu-Hang Ai
OBJECTIVES: This study was designed to test the effectiveness of common carotid artery sonography in comparison with transthoracic echocardiography (TTE) for cardiac output measurements to provide an easier alternative for cardiac output monitoring in the intensive care unit. METHODS: This study included 148 patients who had common carotid artery Doppler examinations and TTE performed within 8 hours of each other, and the cardiac output measurement results were compared with each other...
April 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28420337/right-aortic-arch-analysis-anatomical-variant-or-serious-vascular-defect
#4
Agata Arazińska, Michał Polguj, Konrad Szymczyk, Magdalena Kaczmarska, Łukasz Trębiński, Ludomir Stefańczyk
BACKGROUND: The right-sided aortic arch (RAA) is a rare congenital defect of the aorta. The aim of the study was to assess the occurrence of RAA in diagnoses performed by the University Radiology Department and analyze the frequency of concomitant vascular abnormalities. METHODS: The database of the Radiology Department was retrospectively analyzed between January 2008 and May 2016 with the keyword "right aortic arch". Twenty patients with this diagnosis were identified from a total of 11,690 CT examinations of the chest area, 19,623 CT examinations of brain-supplying vessels, and 1863 MRI examinations of the heart and aortic arch or brain-supplying arteries...
April 19, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28417646/cerebral-hemodynamic-assessment-and-neuroimaging-across-the-lifespan-in-sickle-cell-disease
#5
Lori C Jordan, Michael R DeBaun
Children and adults with sickle cell anemia (SCA) have a higher risk of strokes compared to age- and race-matched peers. Velocity in the middle cerebral or distal internal carotid artery as measured by transcranial Doppler ultrasound is a recognized method to identify children but not adults with SCA at high-risk for first stroke. For both children and adults with SCA that have had a stroke, no methods clearly identify individuals at highest risk of recurrent strokes or an initial silent stroke, the most common neurological injury...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28415103/p673improvement-of-arterial-stiffness-and-myocardial-deformation-in-patients-with-poorly-controlled-diabetes-mellitus-type-2-after-optimization-of-antidiabetic-medication
#6
I Ikonomidis, G Pavlidis, V Lambadiari, F Kousathana, H Triantafyllidi, M Varoudi, D Vlastos, S Vlachos, G Dimitriadis, J Lekakis
Background: Arterial stiffness is associated with increased risk for cardiovascular disease. The purpose of this study is to investigate the arterial stiffness and myocardial deformation in patients with poorly controlled diabetes mellitus type 2 before and after glycemic control by optimal medication. Methods: In 50 patients with uncontrolled type 2 diabetes(age:52±10years)and 25 controls of similar age and sex and no atherosclerotic risk factors we measured at baseline and 6 months after glycemic control a) carotid-femoral pulse wave velocity(PWVc m/sec-Complior SP ALAM),central systolic blood pressure(cSBP -mmHg),augmentation index(AI%), of the aortic pulse wave(ArteriographTensioMed) b)S',E'(m/sec)andE'/A'of mitral annulus by Tissue Doppler c)LV longitudinal strain(GLS-%),systolic(LongSr-l/sec)and diastolic(LongSrE-l/sec)strain rate, twisting(Tw-deg),peak twisting(Tw)and untwisting(unTw-deg/sec)velocity using speckle tracking echocardiography...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28411965/dynamic-cerebral-autoregulation-assessment-using-extracranial-internal-carotid-artery-doppler-ultrasonography
#7
Nai-Fang Chi, Hsiao-Lun Ku, Chen-Yen Wang, Yanhui Liu, Lung Chan, Ying-Chin Lin, Chung-Kang Peng, Vera Novak, Han-Hwa Hu, Chaur-Jong Hu
Transcranial Doppler ultrasonography of the middle cerebral artery (MCA) is frequently used to assess dynamic cerebral autoregulation (dCA); however, this is difficult in patients with poor temporal bone windows. In the study described here, we investigated the agreement and sensitivity of dCA indices determined from the extracranial internal carotid artery (ICA) and those determined from the MCA. Measurements for 32 stroke patients and 59 controls were analyzed. Measurement of the mean flow correlation index (Mx) and transfer function analysis based on spontaneous blood pressure fluctuation were simultaneously performed for the extracranial ICA and MCA...
April 12, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28409735/quantitative-magnetic-resonance-angiography-as-a-potential-predictor-for-cerebral-hyperperfusion-syndrome-a-preliminary-study
#8
Lukas Andereggen, Sepideh Amin-Hanjani, Marwan El-Koussy, Rajeev K Verma, Kenya Yuki, Daniel Schoeni, Kety Hsieh, Jan Gralla, Gerhard Schroth, Juergen Beck, Andreas Raabe, Marcel Arnold, Michael Reinert, Robert H Andres
OBJECTIVE Cerebral hyperperfusion syndrome (CHS) is a rare but devastating complication of carotid endarterectomy (CEA). This study sought to determine whether quantitative hemodynamic assessment using MR angiography can stratify CHS risk. METHODS In this prospective trial, patients with internal carotid artery (ICA) stenosis were randomly selected for pre- and postoperative quantitative phase-contrast MR angiography (QMRA). Assessment was standardized according to a protocol and included Doppler/duplex sonography, MRI, and/or CT angiography and QMRA of the intra- and extracranial supplying arteries of the brain...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28406764/the-efficacy-of-tocilizumab-for-the-treatment-of-chinese-takayasu-s-arteritis
#9
Jiaxin Zhou, Zhe Chen, Jing Li, Yunjiao Yang, Jiuliang Zhao, Hu Chen, Min Liu, Fei Sun, Mengtao Li, Xinping Tian, Xiaofeng Zeng
OBJECTIVES: The aim of this study was to evaluate the efficacy and safety of tocilizumab (TCZ) in Chinese Takayasu's arteritis (TA) patients. METHODS: This was a single centre prospective study. Sixteen consecutive TA patients were included. Patients were treated with tocilizumab infusions with a dosage of 8mg/kg. Serum inflammation markers, including erythrocyte sedimentation rate (ESR) and hypersensitivity C reactive protein (hsCRP), were recorded at baseline and before each TCZ infusion...
April 10, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28394756/progression-of-cerebral-white-matter-hyperintensities-and-the-associated-sonographic-index
#10
Woo-Jin Lee, Keun-Hwa Jung, Young Jin Ryu, Keon-Joo Lee, Jeong-Min Kim, Soon-Tae Lee, Kon Chu, Manho Kim, Sang Kun Lee, Jae-Kyu Roh
Purpose To evaluate the relationship between penetrating arterial pulsation and the progression of white matter hyperintensities (WMHs) by using the sonographic resistance index (RI) along the M1 segment of the middle cerebral artery (MCA). Materials and Methods The study design was approved by the institutional review board of Seoul National University Hospital. The study included 450 individuals who had undergone initial transcranial Doppler (TCD) sonography and magnetic resonance imaging, with follow-up imaging performed within 34-45 months, and who had no stenosis of 30% or more in the internal carotid artery or MCA or a history of stroke other than an old lacunar infarction...
April 10, 2017: Radiology
https://www.readbyqxmd.com/read/28393772/carotid-artery-disease-and-periprocedural-stroke-risk-after-transcatheter-aortic-valve-implantation
#11
Parthasarathy D Thirumala, Sruthi Muluk, Reshmi Udesh, Amol Mehta, John Schindler, Suresh Mulukutla, Vinodh Jeevanantham, Lawrence Wechsler, Thomas Gleason
OBJECTIVE/BACKGROUND: To examine the role of carotid stenosis (CS) and other independent risk factors of perioperative stroke, following transcatheter aortic valve implantation (TAVI). MATERIALS AND METHODS: Using data from the National Inpatient Sample database for analysis, patients who underwent TAVI were identified using the International Classification of Diseases, Ninth Revision, Clinical Modification codes. Various preoperative and perioperative risk factors and their association with perioperative strokes were studied...
April 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28390773/common-carotid-artery-end-diastolic-velocity-and-acceleration-time-can-predict-degree-of-internal-carotid-artery-stenosis
#12
David S Strosberg, Mounir J Haurani, Bhagwan Satiani, Michael R Go
OBJECTIVE: Whereas duplex ultrasound parameters for predicting internal carotid artery (ICA) stenosis are well defined, the use of common carotid artery (CCA) Doppler characteristics to predict ICA stenosis when the ICA cannot be insonated directly or accurately because of anatomy, calcification, or tortuosity has not been studied. The objective of this study was to identify CCA Doppler parameters that may predict ICA stenosis. METHODS: We reviewed all patients at our institution who underwent carotid duplex ultrasound (CDU) from 2008 to 2015 and also had a comparison computed tomography, magnetic resonance, or catheter angiogram...
April 5, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28389602/shear-mediated-dilation-of-the-internal-carotid-artery-occurs-independent-of-hypercapnia
#13
Ryan L Hoiland, Kurt Jason Smith, Howard H Carter, Nia C S Lewis, Michael M Tymko, Kevin W Wildfong, Anthony R Bain, Daniel J Green, Philip N Ainslie
Evidence for shear stress as a regulator of carotid artery dilation in response to increased arterial carbon dioxide was recently demonstrated in humans during sustained elevations in CO2 (hypercapnia); however, the relative contributions of CO2 and shear stress to this response remains unclear. We examined the hypothesis that, following a 30-second transient increase in arterial CO2 tension and consequent increase in internal carotid artery shear stress, internal carotid artery diameter would increase, indicating shear-mediated dilation, in the absence of concurrent hypercapnia...
April 7, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28388354/haemoglobin-oxygen-saturation-leucocyte-count-and-lactate-dehydrogenase-are-predictors-of-elevated-cerebral-blood-flow-velocity-in-nigerian-children-with-sickle-cell-anaemia
#14
Oyesola Oyewole Ojewunmi, Titilope Adenike Adeyemo, Akinniyi Adediran Osuntoki, Ngozi Awa Imaga, Ajoke Idayat Oyetunji
BACKGROUND: Transcranial Doppler ultrasound (TCD) scan, which measures blood flow velocity through the time-averaged mean of maximum velocities (TAMMVs) in the internal carotid arteries and middle cerebral arteries, is a useful screening tool for predicting stroke risk in children with sickle cell anaemia (SCA). AIM: To investigate which clinical and laboratory indices predict abnormal TCD velocity in children with SCA. METHODS: Fifty-four SCA patients with normal TCD (TAMMV < 170 cm/s), classified as negative TCD (NTCD), and 93 patients with conditional and abnormal TCD velocities (TAMMV ≥ 170 cm/s) classified as positive TCD were recruited...
April 7, 2017: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/28387900/the-relationship-between-intracranial-pressure-and-neurocognitive-function-before-and-after-the-repair-of-a-skull-injury
#15
J He, L-L Chen, D-K Sun, H-T Wang, J-J Wang, X Zhai
OBJECTIVE: This study examines the relationship between intracranial pressure (ICP) changes after skull injury repair and neurocognitive function before and after the repair. PATIENTS AND METHODS: Sixty patients undergoing skull injury repair participated in the study. A non-invasive detection analyzer was used to detect the ICP 2 days before operation, 10 days after the operation and one month after the operation in all patients. Additionally, the mean cerebral blood flow velocities (MV) in the internal carotid and the medial cerebral arteries were detected using a transcranial Doppler ultrasound (TCD)...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28384835/validation-of-the-automated-electronic-microemboli-detection-system-in-patients-undergoing-carotid-endarterectomy
#16
Tesse Leunissen, Daniel van Vriesland, Hester den Ruijter, Frans Moll, Werner Mess, Gert Jan de Borst
Purpose To assess the diagnostic value of automatic embolus detection software (AEDS) in transcranial Doppler (TCD) monitoring for the detection of solid microemboli in patients at risk for perioperative stroke during carotid endarterectomy (CEA). Materials and Methods In 50 patients undergoing CEA, perioperative TCD registration was recorded. All recorded events, identified and saved by the AEDS, were analyzed off-line doubly by two human experts (HEs) within a time frame of > 4 months. The inter- and intraobserver variability was assessed...
April 6, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28378703/-carotid-sinus-massage-is-not-a-benign-intervention
#17
R B A van den Brink, F J de Lange
Carotid sinus massage for diagnosis and termination of supraventricular tachycardia (SVT) is still a widely used vagal manoeuvre in the A&E department. However, itsefficacy is limited (termination of the SVT in approximately 20%) and carotid sinus massage may be complicated by (potentially devastating) neurologic complications in 0.2-1% of the patients. There are safer interventions without neurologic complications, such as the modified Valsalva manoeuvre (efficacy 43%) and intravenous administration of adenosine (efficacy 75%)...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28374705/-effects-of-chronic-tabacco-smoking-on-the-cerebral-blood-flow
#18
N V Zakharchuk, V A Nevzorova, V M Chertok, N S Sarafanova
AIM: To study an effect of chronic smoking on cerebral hemodynamics and cerebrovascular reactivity in different segments of the arterial system of the brain in men. MATERIAL AND METHODS: Male patients enrolled in the study were divided into two groups: controls (n=11) and smokers (n=24) with index 30.7 pack-year smoking history. Haemorheological parameters: viscosity of blood, aggregation of erythrocytes, hematocrit, fibrinogen were evaluated in both groups. Using carotid duplex ultrasound (MyLab 50 Esaote, Italy), intima-media thickness (IMT) of common carotid arteries (CCA) was measured...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28372946/the-role-of-embolic-protection-in-carotid-stenting-progress-in-cardiovascular-diseases-pcvd
#19
REVIEW
Taisei Kobayashi, Jay Giri
Embolic protection device (EPD) use has become ubiquitous and is currently mandated by the Centers for Medicare and Medicaid (CMS) for reimbursement in conjunction with carotid artery stenting (CAS). There are two classes of EPD devices: distal filter EPD (f-EPD) and proximal EPD (p-EPD). Measuring the incremental benefit of one strategy over the other remains problematic for several reasons. The first lies in the difficulty of defining an embolic event as transcranial Doppler and diffusion-weighted magnetic resonance imaging abnormalities may not correlate with clinical events...
March 31, 2017: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/28371741/carotid-flow-pulsatility-is-higher-in-women-with-greater-decrement-in-gait-speed-during-multi-tasking
#20
Joaquin U Gonzales, C Roger James, Hyung Suk Yang, Daniel Jensen, Lee Atkins, Kareem Al-Khalil, Michael O'Boyle
AIM: Central arterial hemodynamics is associated with cognitive impairment. Reductions in gait speed during walking while performing concurrent tasks known as dual-tasking (DT) or multi-tasking (MT) is thought to reflect the cognitive cost that exceeds neural capacity to share resources. We hypothesized that central vascular function would associate with decrements in gait speed during DT or MT. METHODS: Gait speed was measured using a motion capture system in 56 women (30-80y) without mild-cognitive impairment...
March 24, 2017: Gait & Posture
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