Search results for "Linea"

showing 10 items of 7724 documents

Carotid atherosclerosis and chronic hepatitis C: A prospective study of risk associations

2011

BACKGROUND AND AIMS: There are contrasting results in studies of cardiovascular risk in patients with genotype 1 chronic hepatitis C (G1 CHC). We evaluated the prevalence of carotid atherosclerosis compared with a control population in order to assess the potential association between atherosclerosis, host and viral factors, and liver histological features. MATERIALS AND METHODS: One hundred seventy-four consecutive biopsy-proven G1 CHC patients were evaluated by anthropometric and metabolic measurements. One hundred seventy-four patients attending an outpatient cardiology unit were used as controls. Intima-media thickness (IMT) and carotid plaques, defined as focal thickening of > 1.3 mm a…

Carotid Artery DiseasesMaleLIVER BIOPSYComorbiditySeverity of Illness IndexGastroenterologyBody Mass IndexReference ValuesOdds RatioPrevalenceProspective StudiesProspective cohort studySettore MED/12 - Gastroenterologiamedicine.diagnostic_testBiopsy NeedleSmokingHepatitis CMiddle AgedPrognosisHCV ATHEROSCLEROSI FIBROSISImmunohistochemistryItalyCAROTID ATHEROSCLEROSISFemaleRadiologyAdultmedicine.medical_specialtySettore MED/08 - Anatomia PatologicaCHRONIC HEPATITIS CRisk AssessmentYoung AdultAge DistributionInternal medicineDiabetes mellitusBiopsyHEPATIC FIBROSISConfidence IntervalsmedicineHumansObesitySex DistributionAgedAnalysis of VarianceHepatologybusiness.industryCase-control studyUltrasonography DopplerOdds ratioHepatitis C ChronicHepatologymedicine.diseaseDiabetes Mellitus Type 2Case-Control StudiesMultivariate AnalysisLinear ModelsSteatosisbusinessHepatology
researchProduct

Relationship between carotid intima-media thickness and non valvular atrial fibrillation type.

2015

OBJECTIVE: Carotid intima-media thickness (cIMT) is a surrogate marker of subclinical atherosclerosis and it is able to predict both coronary and cerebral vascular events. No data exist on the association between cIMT and non valvular atrial fibrillation (NVAF) type. We conduct this study with the aim to analyze the association between abnormal cIMT and NVAF type. METHODS: A cross-sectional study of the "Atrial fibrillation Registry for Ankle-brachial index Prevalence Assessment-Collaborative Italian Study (ARAPACIS)" has been performed. Among 2027 patients enrolled in the ARAPACIS, 673 patients, who underwent carotid ultrasound examination to assess cIMT, were included in the study. RESULT…

Carotid Artery DiseasesMaleRegistrieSettore MED/09 - Medicina Internagenetic structuresCross-sectional studycarotid intima-media thickness; non valvular atrial fibrillation; ARAPACIScarotid atherosclerosisPredictive Value of TestComorbiditySubclinical atherosclerosiintima-media-thicknessCarotid intima-media thickneRisk FactorsAtrial Fibrillation80 and overPrevalencenonvalvular atrial fibrillation; intima-media-thickness; carotid atherosclerosisRegistriesCarotid intima-media thicknessStrokeAged 80 and overCarotid intima-media thickness; Paroxysmal non valvular atrial fibrillation; Persistent/permanent non valvular atrial fibrillation; Subclinical atherosclerosis; Aged; Aged 80 and over; Ankle Brachial Index; Asymptomatic Diseases; Atrial Fibrillation; Carotid Artery Diseases; Carotid Artery Common; Chi-Square Distribution; Comorbidity; Cross-Sectional Studies; Female; Humans; Italy; Linear Models; Logistic Models; Male; Middle Aged; Predictive Value of Tests; Prevalence; Registries; Risk Factors; Carotid Intima-Media ThicknessMedicine (all)Atrial fibrillationMiddle AgedCommonItalyPredictive value of testsnon valvular atrial fibrillationCardiologycardiovascular systemLinear ModelFemaleCardiology and Cardiovascular MedicineHumanmedicine.medical_specialtyLogistic ModelCarotid Artery CommonPersistent/permanent non valvular atrial fibrillationparoxysmal non valvular atrial fibrillation; persistent/permanent non valvular atrial fibrillation; subclinical atherosclerosis; carotid intima-media thicknessPredictive Value of TestsParoxysmal non valvular atrial fibrillationInternal medicinemedicineHumansAnkle Brachial Indexcardiovascular diseasesSubclinical atherosclerosisCarotid intima-media thickness; Paroxysmal non valvular atrial fibrillation; Persistent/permanent non valvular atrial fibrillation; Subclinical atherosclerosisAgedCross-Sectional StudieAsymptomatic DiseaseCarotid Artery DiseaseChi-Square Distributionbusiness.industrySurrogate endpointRisk Factornonvalvular atrial fibrillationmedicine.diseaseSettore MED/11 - Malattie Dell'Apparato CardiovascolareComorbidityParoxysmal Non Valvular Atrial Fibrillation Persistent/Permanent Non Valvular Atrial Fibrillation Subclinical Atherosclerosis Carotid Intima-Media ThicknessCross-Sectional StudiesLogistic ModelsIntima-media thicknessAsymptomatic DiseasesLinear ModelsARAPACISCarotid ArterybusinessChi-squared distribution
researchProduct

Carotid restenosis is associated with plasma ADMA concentrations in carotid endarterectomy patients

2011

Abstract Background: The aim of this work has been to study the association between plasma asymmetric dimethylarginine (ADMA) concentrations and carotid stenosis in a group of 64 patients undergoing carotid endarterectomy (CEA). Methods: Arginine, ADMA and symmetric dimethylarginine (SDMA) were measured using capillary electrophoresis with UV detection. An evaluation of plasma concentrations of total cysteine (tCys) and total homocysteine (tHcy) was also performed. Results: Pearson’s analysis show a positive correlation between ADMA and carotid stenosis (r=0.37, p=0.003), which is also confirmed after stepwise multiple linear regression analysis. ADMA plasma concentrations were significantl…

Carotid Artery DiseasesMalemedicine.medical_specialtyArginineHomocysteinemedicine.medical_treatmentClinical BiochemistryCarotid endarterectomyArginineCohort Studiesrestenosischemistry.chemical_compoundRestenosisInternal medicinemedicineHumansCysteineHomocysteineAgedEndarterectomyEndarterectomy Carotidbusiness.industryBiochemistry (medical)General MedicineMiddle Agedmedicine.diseaseADMAStenosisSettore BIO/12 - Biochimica Clinica E Biologia Molecolare ClinicachemistryCardiologyRegression AnalysisFemaleMultiple linear regression analysisAsymmetric dimethylargininebusinesscarotid endarterectomycclm
researchProduct

Association between asymptomatic carotid atherosclerosis and degenerative aortic stenosis.

2012

OBJECTIVE: Degenerative aortic stenosis shows similarities with atherosclerosis. To confirm the hypothesis that aortic stenosis is an "atherosclerosis-like" disease, we investigated the association between degenerative aortic stenosis and atherosclerosis of carotid arteries. METHODS: We studied 270 consecutive patients, 135 with degenerative aortic stenosis (trans-aortic peak velocity ≥ 2 m/sec) and other 135 subjects without aortic valve disease. All patients underwent echocardiography and ultrasound scan of the supra-aortic trunks to assess the presence of plaque and/or intima-media thickening (IMT). RESULTS: Atherosclerosis of carotid arteries (IMT and plaque) was significantly more freq…

Carotid Artery DiseasesMalemedicine.medical_specialtyCarotid Intima-Media ThicknessRisk AssessmentSeverity of Illness IndexAsymptomaticPredictive Value of TestsRisk FactorsInternal medicineSeverity of illnessOdds RatiomedicineHumansAgedAsymptomatic DiseasesAged 80 and overChi-Square Distributionbusiness.industryCase-control studyAortic Valve StenosisOdds ratiomedicine.diseaseSettore MED/11 - Malattie Dell'Apparato CardiovascolarePlaque AtheroscleroticStenosisCarotid ArteriesItalyCarotid atherosclerosis aortic stenosisCase-Control StudiesPredictive value of testsAsymptomatic DiseasesLinear Modelscardiovascular systemCardiologyFemaleRadiologymedicine.symptomCardiology and Cardiovascular MedicinebusinessChi-squared distribution
researchProduct

Changes in ultrasound-assessed carotid intima-media thickness and plaque with a Mediterranean diet: a substudy of the PREDIMED trial.

2014

OBJECTIVE - : The Prevención con Dieta Mediterránea (PREDIMED) trial showed that a Mediterranean diet (MedDiet) supplemented with either extra virgin olive oil or 30 g/d of mixed nuts reduced incident cardiovascular events compared with a control (low fat) diet. The mechanisms of cardiovascular protection afforded by MedDiets remain to be uncovered. We assessed the effect of both supplemented MedDiets on internal carotid intima-media thickness (ICA-IMT) and plaque height, the ultrasound features that best predict future cardiovascular events, in subjects at high cardiovascular risk. APPROACH AND RESULTS - : In a PREDIMED subcohort (n=175), plaque height and carotid IMT of 3 prespecified seg…

Carotid Artery DiseasesMalemedicine.medical_specialtyTime FactorsMediterranean dietCarotid imtDiet MediterraneanCarotid Intima-Media ThicknessPredictive Value of TestsRisk FactorsInternal medicinemedicineCarotid stenosisHumansNutsPlant OilsCarotid intima-media thicknessUltrasonography Doppler ColorOlive OilDieta mediterraneaAgedAged 80 and overChi-Square Distributionbusiness.industryUltrasoundMiddle AgedPredimedConfidence intervalPlaque AtheroscleroticSurgeryLogistic ModelsTreatment OutcomeIntima-media thicknessSpainMultivariate AnalysisCardiologycardiovascular systemDisease ProgressionLinear ModelsFemaleCardiology and Cardiovascular MedicinebusinessOlive oilCarotid Artery InternalOlive oilArteriosclerosis, thrombosis, and vascular biology
researchProduct

The Association between Dietary Magnesium Intake and Magnetic Resonance Parameters for Knee Osteoarthritis

2019

The aim of the study was to evaluate the relationship between dietary magnesium (Mg) intake and prevalence of knee osteoarthritis (OA), a topic poorly explored in the literature. Overall, 783 people participating in the Osteoarthritis Initiative (59.8% females

Cartilage ArticularMalelifestylemedicine.medical_specialtyKnee JointUrologylcsh:TX341-641030209 endocrinology & metabolismOsteoarthritismagnesiumDiet SurveysDietary MagnesiumArticleknee osteoarthritisEating03 medical and health sciencesknee osteoarthriti0302 clinical medicinemedicineHumansFemurTibia030203 arthritis & rheumatologyNutrition and Dieteticsmedicine.diagnostic_testbusiness.industryCartilageConfoundingMagnetic resonance imagingMean ageMiddle AgedOsteoarthritis Kneemedicine.diseaseMagnetic Resonance ImagingDietagedCross-Sectional Studiesmedicine.anatomical_structureLinear ModelsFemalehealthy ageingbusinesslcsh:Nutrition. Foods and food supplyMRIFood ScienceNutrients
researchProduct

Application of the star-product method to the angular momentum quantization

1992

We define a *-product on ℝ3 and solve the polarization equation f*C=0 where C is the Casimir of the coadjoint representation of SO(3). We compute the action of SO(3) on the space of solutions. We then examine the case of non-zero eigenvalues of C, in order to find finite-dimensional representations of SO(3). Finally, we compute \(\sqrt C *\sqrt C \) as an asymptotic series of C. This gives an explanation of the use of the star square root of C in a paper by Bayen et al. instead of its natural square root.

Casimir effectAngular momentumQuantization (physics)Coadjoint representationSquare rootStar productStatistical and Nonlinear PhysicsGeometryAsymptotic expansionMathematical PhysicsEigenvalues and eigenvectorsMathematicsMathematical physicsLetters in Mathematical Physics
researchProduct

INTEGRAL SOLUTIONS TO A CLASS OF NONLOCAL EVOLUTION EQUATIONS

2010

We study the existence of integral solutions to a class of nonlinear evolution equations of the form [Formula: see text] where A : D(A) ⊆ X → 2X is an m-accretive operator on a Banach space X, and f : [0, T] × X → X and [Formula: see text] are given functions. We obtain sufficient conditions for this problem to have a unique integral solution.

Cauchy problemClass (set theory)Pure mathematicsApplied MathematicsGeneral MathematicsOperator (physics)Mathematical analysisBanach spaceIntegral solutionFixed pointNonlinear evolutionFourier integral operatorMathematicsCommunications in Contemporary Mathematics
researchProduct

On Approximation of Entropy Solutions for One System of Nonlinear Hyperbolic Conservation Laws with Impulse Source Terms

2010

We study one class of nonlinear fluid dynamic models with impulse source terms. The model consists of a system of two hyperbolic conservation laws: a nonlinear conservation law for the goods density and a linear evolution equation for the processing rate. We consider the case when influx-rates in the second equation take the form of impulse functions. Using the vanishing viscosity method and the so-called principle of fictitious controls, we show that entropy solutions to the original Cauchy problem can be approximated by optimal solutions of special optimization problems.

Cauchy problemConservation lawOptimization problemEntropy solutionsArticle SubjectVanishing viscosity methodMathematical analysisNonlinear fluid dynamicmodelsNonlinear conservation lawlcsh:QA75.5-76.95Computer Science ApplicationsNonlinear systemlcsh:TA1-2040Modeling and SimulationEvolution equationNonlinear fluid dynamicmodels; Vanishing viscosity method; Principle of fictitious controls; Entropy solutionsPrinciple of fictitious controlslcsh:Electronic computers. Computer scienceElectrical and Electronic Engineeringlcsh:Engineering (General). Civil engineering (General)Hyperbolic partial differential equationEntropy (arrow of time)MathematicsJournal of Control Science and Engineering
researchProduct

A logarithmic fourth-order parabolic equation and related logarithmic Sobolev inequalities

2006

A logarithmic fourth-order parabolic equation in one space dimension with periodic boundary conditions is studied. This equation arises in the context of fluctuations of a stationary nonequilibrium interface and in the modeling of quantum semiconductor devices. The existence of global-in-time non-negative weak solutions and some regularity results are shown. Furthermore, we prove that the solution converges exponentially fast to its mean value in the ``entropy norm'' and in the Fisher information, using a new optimal logarithmic Sobolev inequality for higher derivatives. In particular, the rate is independent of the solution and the constant depends only on the initial value of the entropy.

Cauchy problemLogarithmApplied MathematicsGeneral Mathematics35B40Mathematical analysisNon-equilibrium thermodynamicsPoincaré inequalitySobolev inequalityNonlinear systemsymbols.namesake35K3535K55symbolsPeriodic boundary conditionsUniquenessMathematicsCommunications in Mathematical Sciences
researchProduct