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https://www.readbyqxmd.com/read/29157451/an-integrated-method-for-atherosclerotic-carotid-plaque-segmentation-in-ultrasound-image
#1
Chunjun Qian, Xiaoping Yang
BACKGROUND AND OBJECTIVE: Carotid artery atherosclerosis is an important cause of stroke. Ultrasound imaging has been widely used in the diagnosis of atherosclerosis. Therefore, segmenting atherosclerotic carotid plaque in ultrasound image is an important task. Accurate plaque segmentation is helpful for the measurement of carotid plaque burden. In this paper, we propose and evaluate a novel learning-based integrated framework for plaque segmentation. METHODS: In our study, four different classification algorithms, along with the auto-context iterative algorithm, were employed to effectively integrate features from ultrasound images and later also the iteratively estimated and refined probability maps together for pixel-wise classification...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29156485/-cervical-plexus-blocks
#2
Ronald Seidel
Blockades of the cervical plexus are established anesthesia procedures, not only in the context of operative carotid revascularizations. Recent investigations define inner sonoanatomic landmarks as well as the importance of brain nerves for innervation in the neck region. The present practice-oriented article discusses current study results, alternative techniques (ultrasound- versus landmark-guided) and fields of application (carotid desobliteration, surgery of the shoulder, ear and infraclavicular region)...
November 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/29154247/diagnostic-evaluation-of-neck-torsion-test-in-objective-examination-in-patients-with-vertigo-and-or-hearing-impairment
#3
Piotr Niewiadomski, Marzena Bielińska, Piotr Pietkiewicz, Jurek Olszewski
INTRODUCTION: The aim of the study was to evaluate the neck torsion test in objective examinations of patients with vertigo and/or hearing loss. MATERIAL AND METHODS: The study was conducted in 100 patients, including 54 women and 46 men aged 17-79 years, who were divided into two groups: I - 50 patients, including 30 women and 20 men aged 17-79 years (mean age 49.92 years) with dizziness and/or hearing impairments, and confirmed asymmetry of intracranial vessels, II - 50 patients - the control group, including 24 women and 26 men aged 20-71 years without dizziness and/or hearing disorders and without disturbance in the construction of intracranial vessels...
October 30, 2017: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29153673/pregnancy-complications-and-later-vascular-ultrasound-measures-a-cohort-study
#4
Emily W Harville, Markus Juonala, Jorma S A Viikari, Mika Kähönen, Olli T Raitakari
OBJECTIVES: Pregnancy complications predict or even predispose to later cardiovascular disease in the mother. We examined whether pregnancy complications are associated with post-pregnancy measures of endothelial dysfunction and arterial stiffness. STUDY DESIGN: Prospective cohort; Data for 847 women female participants in the Cardiovascular Risk in Young Finns study were linked with the national birth registry. Preterm birth (<37weeks), low birthweight (<2500g), small-for-gestational-age (weight <10th percentile for gestational age), and hypertensive disorders of pregnancy were examined as predictors of later vascular measures...
October 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29153302/accuracy-of-carotid-duplex-criteria-in-diagnosis-of-significant-carotid-stenosis-in-asian-patients
#5
Pornpatr A Dharmasaroja, Nattaphol Uransilp, Arvemas Watcharakorn, Pritsana Piyabhan
BACKGROUND: Extracranial carotid stenosis can be diagnosed by velocity criteria of carotid duplex. Whether they are accurately applied to define severity of internal carotid artery (ICA) stenosis in Asian patients needs to be proved. The purpose of this study was to evaluate the accuracy of 2 carotid duplex velocity criteria in defining significant carotid stenosis. METHODS: Carotid duplex studies and magnetic resonance angiography were reviewed. Criteria 1 was recommended by the Society of Radiologists in Ultrasound; moderate stenosis (50%-69%): peak systolic velocity (PSV) 125-230 cm/s, diastolic velocity (DV) 40-100 cm/s; severe stenosis (>70%): PSV greater than 230 cm/s, DV greater than 100 cm/s...
November 16, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29152651/age%C3%A2-related-differences-in-serum-mfg%C3%A2-e8-tgf%C3%A2-%C3%AE-1-and-correlation-to-the-severity-of-atherosclerosis-determined-by-ultrasound
#6
Huiying Zhao, Huanhuan Zhang, Xiujiao Qin
Atherosclerosis (AS) is an age‑related inflammatory disease. Globule‑epidermal growth factor‑8 (MFG‑E8) and transforming growth factor-β1 (TGF‑β1) are involved in the pathogenesis of AS. However, age‑related changes in circulating levels of MFG‑E8 and TGF‑β1, and their correlation with the severity of AS is not well‑characterized. In this study, we investigated age‑related changes in serum levels of MFG‑E8, TGF‑β1 and examined their association with the severity of AS. Sixty healthy volunteers were divided into young, middle‑age and old‑age groups...
October 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29148586/a-dynamic-ultrasound-simulation-of-a-pulsating-three-layered-cca-for-validation-of-2d-wall-motion-and-blood-velocity-estimation-algorithms
#7
Xiao Hu, Yufeng Zhang, Guanghui Cai, Kexin Zhang, Li Deng, Lian Gao, Suya Han, Jianhua Chen
PURPOSE: A dynamic ultrasound simulation model for the common carotid artery (CCA) with three arterial layers for validation of 2D wall motion and blood velocity estimation algorithms is proposed in present study. This model describes layers with not only characteristics of echo distributions conforming to clinical ones, but also varying thicknesses, axial and radial displacements with pulsatile blood pressure during a cardiac cycle. METHODS: The modeling process is as follows: first, a geometrical model according with the clinical structure size of a CCA is built based on the preset layer thicknesses and the diameter of lumen...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29148412/psychological-comorbidities-associated-with-subclinical-atherosclerosis-in-greek-patients-with-primary-sj%C3%A3-gren-s-syndrome-a-potential-contribution-of-sleep-impairment
#8
Theofanis Karageorgas, Dimitrios Ioakeimidis, Clio P Mavragani
OBJECTIVES: Impaired sleep and psychological disorders are increasingly recognised as prevalent comorbidities in patients with primary Sjögren's syndrome (pSS), as well as important contributors of atherosclerosis in the general population. In the current study we sought to explore a potential role of psychological comorbidities in the pronounced atherosclerotic risk of pSS patients. METHODS: Fifty-nine pSS patients fulfilling the ACR/EULAR criteria completed specific validated questionnaires assessing fatigue, depression, anxiety and sleep disturbances...
November 14, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29142565/correlation-between-hyperhomocysteinemia-and-common-carotid-artery-intima-media-thickness-in-carbamazepine-treated-epileptic-patients-using-ultrasonography
#9
Shazia Bano, Nudrat Anwar Zuberi, Syed Munawar Alam
Objective: The objective was to assess the role of homocysteine in the development of atherosclerosis in common carotid artery in the carbamazepine treated epileptic patients. Methods: This study was conducted in the Department of Biochemistry, Basic Medical Sciences Institute (BMSI), Jinnah Postgraduate Medical Center (JPMC), Karachi. Three hundred individuals, aged 34 ± 9.5 years were selected and divided into three groups. Each group comprised of 100 subjects labeled as Group-A (control group had healthy individuals), Group-B (newly diagnosed epileptic patients without antiepileptic therapy), Group-C (epileptic patients on Carbamazepine therapy, which was further subdivided into C-I having epileptic patients on Carbamazepine therapy less than 1 year n=33, C-II had epileptic patients on Carbamazepine therapy 1-2 years n = 33 and C-III comprised of epileptic patients on Carbamazepine therapy more than 2 years n = 34)...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29142027/underestimation-of-risk-of-carotid-subclinical-atherosclerosis-by-cardiovascular-risk-scores-in-patients-with-psoriatic-arthritis
#10
Jiayun Shen, Steven H Lam, Qing Shang, Chun-Kwok Wong, Edmund K Li, Priscilla Wong, Emily W Kun, Isaac T Cheng, Martin Li, Tena K Li, Tracy Y Zhu, Jack Jock-Wai Lee, Mimi Chang, Alex Pui-Wai Lee, Lai-Shan Tam
OBJECTIVE: To test the performances of established cardiovascular (CV) risk scores in discriminating subclinical atherosclerosis (SCA) in patients with psoriatic arthritis. METHODS: These scores were calculated: Framingham risk score (FRS), QRISK2, Systematic COronary Risk Evaluation (SCORE), 10-year atherosclerotic cardiovascular disease risk algorithm (ASCVD) from the American College of Cardiology and the American Heart Association, and the European League Against Rheumatism (EULAR)-recommended modified versions (by 1...
November 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/29140571/is-overactive-bladder-microvasculature-disease-a-component-of-systemic-atheroscleorosis
#11
Ahmet Ozgur Yeniel, Ahmet Mete Ergenoglu, Reci Meseri, Erkan Kismali, Anıl Ari, Gulgun Kavukcu, Hikmet H Aydin, Handan Ak, Sevcan Atay, Ismail Mete Itil
AIMS: To evaluate the relationship between overactive bladder (OAB) and systemic atherosclerosis in a cohort of women. METHODS: In this case-control study, we assessed atherosclerosis indicators, such as Framingham risk scores and carotid and femoral artery intima-media thickness, and evaluated possible bladder wall responses to atherosclerosis using endovaginal color Doppler ultrasound and the detection of urinary cytokines in women with OAB and in controls. Quantitative assessment of blood perfusion at the bladder neck was performed using a method that allows for the dynamic monitoring of flow in a predefined region of interest at every point of the cardiac cycle...
November 15, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29137477/circulating-lipopolysaccharide-binding-protein-and-carotid-intima-media-thickness-in-obstructive-sleep-apnea
#12
I Trojova, M Kozarova, D Petrasova, Z Malachovska, I Paranicova, P Joppa, R Tkacova
Circulating lipopolysaccharide-binding protein (LBP), a metabolic endotoxemia marker, was identified as an independent predictor of atherosclerosis. Although increases in carotid intima-media thickness (CIMT) were repeatedly reported in obstructive sleep apnea (OSA), neither the role of OSA in metabolic endotoxemia nor of LBP in early atherosclerosis were explored in patients with OSA. At a tertiary university hospital we investigated the relationships between OSA, LBP and CIMT in 117 men who underwent full polysomnography and CIMT assessment by B-mode ultrasound...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29135355/changes-in-ocular-hemodynamics-after-carotid-artery-angioplasty-and-stenting-caas-in-patients-with-different-severity-of-ocular-ischemic-syndrome
#13
Feiyan Ma, Jing Su, Qingli Shang, Jingxue Ma, Tongdi Zhang, Xin Wang, Honglei Ma, Jianghua Yu
PURPOSE: To evaluate the effects of carotid artery angioplasty and stenting (CAAS) on patients who were diagnosed with ocular ischemic syndrome (OIS). METHODS: Sixty-four eyes of 64 OIS patients with ipsilateral internal carotid artery stenosis ≥70% were included in the study. The study eyes were divided into two groups according to the presence of iris neovascularization: NVI-absent group and NVI-present group, with 32 eyes, respectively. All patients received ocular treatment modality according to the presence of non-perfusion area (pan-retinal photocoagulation) and intraocular pressure (medical treatment included timolol maleate eye drops combined with brinzolamide eye drop; trabeculectomy and cyclophotocoagulation)...
November 14, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29132058/clinical-significance-of-the-coexistence-of-carotid-artery-plaque-and-white-matter-disease-in-patients-with-symptomatic-cerebral-infarction
#14
Mami Ishikawa, Hitoshi Sugawara, Toshiyuki Tsuji, Mutsumi Nagai, Gen Kusaka, Heiji Naritaka
OBJECTIVES: Symptomatic cerebral infarction (CI) can occur in patients without main cerebral artery stenosis or occlusion. This study investigated the unique features of carotid artery plaque and white matter disease (WMD) in patients with symptomatic CI and transient ischemic attack (TIA) but without stenosis or occlusion of a main cerebral artery. PATIENTS AND METHODS: We studied 647 patients who underwent both carotid ultrasound examination and brain magnetic resonance images...
December 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29131062/cardio-renal-determinants-of-erectile-dysfunction-in-primary-prevention-a-cross-sectional-study
#15
Vilma Dzenkeviciute, Zaneta Petrulioniene, Egidija Rinkuniene, Virginijus Sapoka, Marija Petrylaite, Jolita Badariene
OBJECTIVE: To investigate the association between severity of erectile dysfunction, cardiovascular risk and target organ (heart, renal, vascular) damage in men free of cardiovascular diseases (CV). SUBJECTS AND METHODS: This study included 182 men: 100 with erectile dysfunction (ED) (IIEF mean score ≤ 21) and 82 without ED (IIEF mean score > 21). The ED was assessed using the International Index of Erectile Function (IIEF-5). Ultrasound was used to evaluate carotid plaques and left ventricular mass, geometry and diastolic function...
November 5, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29129735/arterial-stiffness-and-cerebral-hemodynamic-pulsatility-during-cognitive-engagement-in-younger-and-older-adults
#16
Kevin S Heffernan, Jacqueline A Augustine, Wesley K Lefferts, Nicole L Spartano, William E Hughes, Randall S Jorgensen, Brooks B Gump
This study examined central artery stiffness and hemodynamic pulsatility during cognitive engagement in younger and older adults. METHODS: Vascular-hemodynamic measures were completed in 19 younger (age 35±1yrs) and 20 older (age 69±2yrs) adults at rest and during a Stroop task. Aortic stiffness (carotid-femoral pulse wave velocity, PWV) and carotid pulse pressure (PP) were assessed using applanation tonometry. Carotid stiffness was assessed as a single-point PWV using Doppler Ultrasound...
November 10, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29127268/sickle-mice-are-sensitive-to-hypoxia-ischemia-induced-stroke-but-respond-to-tissue-type-plasminogen-activator-treatment
#17
Yu-Yo Sun, Jolly Lee, Henry Huang, Mary B Wagner, Clinton H Joiner, David R Archer, Chia-Yi Kuan
BACKGROUND AND PURPOSE: The effects of lytic stroke therapy in patients with sickle cell anemia are unknown, although a recent study suggested that coexistent sickle cell anemia does not increase the risk of cerebral hemorrhage. This finding calls for systemic analysis of the effects of thrombolytic stroke therapy, first in humanized sickle mice, and then in patients. There is also a need for additional predictive markers of sickle cell anemia-associated vasculopathy. METHODS: We used Doppler ultrasound to examine the carotid artery of Townes sickle mice tested their responses to repetitive mild hypoxia-ischemia- and transient hypoxia-ischemia-induced stroke at 3 or 6 months of age, respectively...
November 10, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29125372/matched-increases-in-cerebral-artery-shear-stress-irrespective-of-stimulus-induce-similar-changes-in-extra-cranial-arterial-diameter-in-humans
#18
Kurt J Smith, Ryan L Hoiland, Ryan Grove, Hamish McKirdy, Louise Naylor, Philip N Ainslie, Daniel J Green
The mechanistic role of arterial shear stress in the regulation of cerebrovascular responses to physiological stimuli (exercise and hypercapnia) is poorly understood. We hypothesised that, if shear stress is a key regulator of arterial dilation, then matched increases in shear, induced by distinct physiological stimuli, would trigger similar dilation of the large extra-cranial arteries. Participants ( n = 10) participated in three 30-min experimental interventions, each separated by ≥48 h: (1) mild-hypercapnia (FICO2:∼0...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29121596/the-impact-of-long-term-moderate-and-heavy-alcohol-consumption-on-incident-atherosclerosis-among-persons-living-with-hiv
#19
N E Kelso-Chichetto, M Plankey, D S Sheps, A G Abraham, X Chen, S Shoptaw, R C Kaplan, W S Post, R L Cook
BACKGROUND: Level of alcohol consumption is associated with differential risk of atherosclerosis, but little research has investigated this association among HIV+ persons. We evaluated the association between long-term alcohol use and incident atherosclerosis among HIV+ persons. METHODS: We utilized data from HIV+ participants of the Women's Interagency HIV Study (n=483) and the Multicenter AIDS Cohort Study (n=305) without history of cardiovascular disease. Atherosclerosis was assessed two times by B-mode carotid artery ultrasound imaging from 2004 to 2013...
October 28, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29119578/carotid-flow-time-test-performance-for-the-detection-of-dehydration-in-children-with-diarrhea
#20
David C Mackenzie, Sabiha Nasrin, Bita Atika, Payal Modi, Nur H Alam, Adam C Levine
OBJECTIVES: Unstructured clinical assessments of dehydration in children are inaccurate. Point-of-care ultrasound is a noninvasive diagnostic tool that can help evaluate the volume status; the corrected carotid artery flow time has been shown to predict volume depletion in adults. We sought to determine the ability of the corrected carotid artery flow time to identify dehydration in a population of children presenting with acute diarrhea in Dhaka, Bangladesh. METHODS: Children presenting with acute diarrhea were recruited and rehydrated according to hospital protocols...
November 9, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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