Quantitative And Qualitative Retinal Microvascular Characteristics And Blood Pressure

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intervention through health education to control blood pressure in hypertensive patients. walking exercise, blood pressure, and Hypertension INTRODUCTION Hypertension is a condition, where a person has systolic blood pressure ≥ 140mmHg and diastolic blood pressure ≥ 90nmmHg (Haldar, 2013). Hypertension is a


ment of high blood pressure (JNC7), we defined arterial hypertension as a systolic blood pressure ≥140mmHg and/or diastolic blood pressure ≥90mmHg on 3 separate occasions [27] or as antihypertensive treatment. Coronary artery disease (CAD) was diagnosed on the basis of history of myocardial infarction and/or electrocardiographic find-ings

Can Ophthalmoscope Predict Silent Coronary Artery Disease in

Qualitative data were presented in the form of number and percent. Quantitative data were presented in the form of means and SD. All data manipulation and analysis were performed using the 17th version of SPSS (Statistical Package for Social Science). The level of significance was established as value less than 0.05. Comparison between

Mathematical methods for modeling the microcirculation

blood rheology models are combined to predict the distribution of flow, pressure, and hematocrit throughout the network. Then, solute transport and delivery to the surrounding tissue is studied along the network. Vessel geometry may vary due to the interaction with the blood flow (fluid-structure problem) or the input of autoregulatory signals.

Prevalence and risk factors of diabetic retinopathy in Saudi

measured for quantitative variables. Frequencies and percentages were given for qualitative variables. Logistic regression was applied to associate DR with alleged risk factors. Results The prevalence of DR among the study group was 35.8 per cent. Non-proliferative diabetic retinopathy was prevalent in 31.8 per cent cases.

Zinc supplementation attenuate diabetic indices in patients

diabetic retinopathy. Blood sugar and blood pressure are prognostic factors in diabetic retinopathy. The aim of this study was to evaluate the effects of zinc supplementation on diabetes indices and blood pressure in patients with non-proliferative diabetic retinopathy. Patients and Methods: 45 patients with non-proliferative


and relative (percentage), for qualitative variables. Sample characteristics (age, systolic pressure, diastolic pressure, HbA1c, best-corrected visual acuity, and IOP) have been compared between patients with DM and controls by means of Student s t-test. Comparisons among groups (DM Type 1 and DM Type 2, and controls) have been made by means

Edinburgh Research Explorer

study each on adiponectin, blood brain barrier, peptide levels, PTEN mutation, and retinal microvascular calibre; Clinical disorders: vascular disease unspecified (6), cognitive decline or Alzheimer s disease (6), unspecified dementia (4), stroke (4), large artery atheroma (2), Parkinsons disease (2),

OCTA characterisation of microvascular retinal alterations in

Jan 15, 2020 objective qualitative and quantitative analysis of vascular changes in CSC.15 16 Through the analysis of sequential A-scans acquired at the same point, the blood flow is detected by comparing static and moving tissues. The obtained three-dimensional vascular map may be automatically segmented in

Assessment of Inner Retinal Layers and Choroidal Thickness in

Jul 30, 2019 of the retinal nerve fibre layer (RNFL) and the ganglion cell complex (GCC) [4,6 8]. Choroidal alterations also play a key role in the pathophysiology of several retinal diseases, including DR [9 12]. Choroidal thickness (CT) is considered a measure of choroidal blood flow, which supplies the outer retinal layers.

Retinal oximetry and fractal analysis of capillary maps in

Systolic blood pressure (mmHg) 109±8 116±18 Diastolic blood pressure (mmHg) 65±6 73±12 Demographics obtained during the first occasion for capillary maps measurements. Vital signs were acquired before any measurement had taken place, in both occasions Whole Big Vessels Whole Small Vessels 0.5 1.0 1.5 2.0 All vessels

Cutoff Point of HbA1c for Diagnosis of Diabetes Mellitus in

approximate normal distribution for analysis. Quantitative variables were expressed as mean ±standard deviation (SD), and qualitative variables were expressed as numbers and percent-ages. Comparisons between DR and no DR (NDR) groups were performed using two indepen-dent samples t-test, and for categorical variables, the chi-square test was used.

Early Retinal Arteriolar Changes and Peripheral Neuropathy in

using a digital retinal camera. Photographs were evaluated by trained graders, who were masked to participant characteristics, according to standardized protocols for quantitative and qualitative signs. Quantitative retinal vascular changes The Singapore I Vessel Assessment 1.0 (Singapore) computer-assisted program


Retinal vessel morphology is highly related with hypertension, coronary heart disease, and stroke and the changes in retinal vessel identification are considered as earlier diagnosis of the cardiovascular disease. However, there is a difficulty in quantifying changes in retinal vessels. Accurate measurement of vessel diameters on retinal

Retinal microvascular damage and nocturnal hypertension

2. Cheung CY, Tay WT, Mitchell P, et al. Quantitative and qualita-tive retinal microvascular characteristics and blood pressure. J Hypertens. 2011;29:1380 -91. 3. Bhargava M, Ikram MK, Wong TY. How does hypertension affect eyes? J Hum Hypertens. 2012;26:71 -83. Cuspidi C, Meani S, Salerno M, et al. Retinal microvascular changes

Title: Early and global estimation of microvascular target

retinal and skin vessels rapidly and non-invasively and obtain robust microcirculation quantitative measures. Aim Therefore, the aim of this study was: 1) to determine the relationship of high blood pressure with the whole spectrum of microcirculation alterations, through the simultaneous investigation of the status of

Quantitative assessment of vascular density in diabetic

patients studied, conflicting results of the blood flow in diabetic retinal vessels have also been reported both to decrease [24 26] and to increase [27 30]. In this cohort, the aim is the quantitative measure-ment of VD at foveal and parafoveal area (as a marker of macular perfusion) using OCTA in subtypes of DR

Retinal Microperimetry: A New Tool for Identifying Type 2

Sep 25, 2017 to propose that the evaluation of retinal parameters related to neurodegeneration such as retinal function would be useful for identifying those type 2 diabetic patients at a higher risk of developing AD. There are several methods for measuring retinal function. Among them, fundus-driven

Macular Optical Coherence Tomography Angiography in

provider of blood supply to the central macula, including the photoreceptors [6]. The gold standard modality for the mea-surement of retinal microvasculature remains fluorescein angiography (FA). However, this diagnostic procedure has two major disadvan-tages: it is a time-consuming and invasive modality that requires venipuncture and dye

Retinal Microvascular Changes and Risk of Stroke

Retinal microvascular signs were assessed from baseline retinal photographs including quantitative retinal microvascular parameters (caliber, branching angle, tortuosity, and fractal dimension) and qualitative retinopathy signs. Incident stroke cases were identified during the follow-up period.

Retinal Microperimetry: A New Tool for Identifying Patients

used for qualitative variables and ANOVA followed by a least significant difference (LSD) post hoc test was used for quantitative variables. To evaluate the correlation be-tween retinal sensitivity and MRI and 18FDG-PET variables, a Spearman correlation test and regression analyses ad-justed by age were performed. All P values were based on

Plexus-specific retinal capillary avascular area in exudative

Dec 21, 2020 elucidated. Microvascular abnormality in retina and choroid has been reported to be associated with AMD.4 6 Quantitative and qualitative ocular blood flow abnormalities have been consistently reported using different techniques such as fluorescein and indocyanine green angiography, laser Doppler flow metre and colour Doppler imaging.6 7 In

Systemic Disease Straight Up with a Twist of Neuro-1 hour

Qualitative and Quantitative Differentiation Key features disc edema on OCT: Smooth contour of elevation Nasal RNFL >86um 80% specificity Thick hyporeflectivespace adjacent to disc lazy V 90% specificity Johnson L. Archives of Ophth2009. This patient: opening pressure = 28cm H20

Comparison of subthreshold diode laser micropulse therapy

test was employed to analyze the quantitative data between the two groups. The chi-square test was used to compare the nominal qualitative data. Finally, the changes of quantitative variables between the two groups were analyzed by ANOVA with repeated measurement. Results 34 patients with a mean age of 52.2 ± 6.7 years in the SDM

Original Article Macular Perfusion Changes and Ganglion Cell

quantitative assessment of retinal microvasculature[14]. However, to our knowledge, there is no report of microvascular alteration in patients with SO-related visual loss. Here we review the medical records of seven patients, who underwent PPV and SO tamponade for primary rhegmatogenous retinal detachment (RRD), and suffered unexpected visual loss.

Choroidal structural changes correlate with severity of

CT as an indicator of retinal and choroidal blood flow [ 7 10]. But various variables can affect CT and retinal vessels. So, there is a need to explore more robust and stable marker for the assessment of retinal and choroidal vascular structural characteristics. After the image segmentation technique proposed by

Lifestyle Intervention for Pre-Diabetic Neuropathy

(NCSs), quantitative sensory testing (QST), or quantitative sudomotor axon reflex testing (QSART). NCS values were compared with those for age-matched normal subjects. QST or QSART results were considered abnormal if they were greater than or less than the 95th percen-tile relative to a normal matched popula-tion. Oral glucose tolerance tests

The Fluorescence Angiography in Limb Salvage

microvascular blood flow and perfusion in tissue intraoperatively The flow characteristics in the blood vessels as the dye reaches the tissues Allows for qualitative and quantitative analysis of the patency of circulation to allow for dynamic surgical planning Allowing for focused intraoperative decisions thus leading to reduced

7 1. University Hospital Maggiore della Carita

158 variables; frequency distribution, absolute and relative (percentage), for qualitative variables.159 160 161 Sample characteristics (age, systolic pressure, diastolic pressure, HbA1c, BCVA, and IOP) 162 have been compared between patients with DM and controls by means of t-Student test.

Suggested citation - ACBRD

The qualitative key informant interviews (Phase 2, N=25) and quantitative online questionnaire (Phase 3, N=213) highlighted cohort-specific barriers and enablers to eye examination, as well as psychosocial determinants to the behaviour, including: Information, such as lack of knowledge/awareness of the need for eye examinations,

Abstract - mejfm.com

for quantitative variables, number and percentage for qualitative variables. Statistical difference between groups was tested using: Chi square test, independent sample test and ANOVA test while non-parametric tests were used for quantitative variables which were not normally distributed.

Mathematical methods for modeling the microcirculation

The microcirculation is the collective name for the smallest (<150 µm in diameter) blood vessels in the body. As a first approximation, it consists of blood vessels that are too small to be seen with the naked eye. Microcirculatory vessels are the site of control of tissue perfusion, blood-tissue exchange, and tissue blood volume.

ORIGINALINVESTIGATION Comparative e˜ects of˚microvascular and

MR)and routine blood pressure treatment (sing a fixe-dose combination of perindopril and indap)he risk of major microvascular and macrovascular events 11,140atients with typ2abetes and at least one other cardiovascular risk factor or pr-xisting cardiovas - cular diseas[7 9].Subsequently,8494he surviving

Hypertensive Retinal Vessel Wall Signs in a General Older

retinal arteriolar equivalent and arteriole-to-venule ratio, were used as indexes of generalized arteriolar narrowing. Blood pressure was measured with the use of a mercury sphygmomanometer. Hypertension was defined through the use of antihypertensive medications, systolic blood pressure 160 mm Hg, or diastolic blood pressure 95 mm Hg.

Article Imaging Artifacts and Segmentation Errors With Wide

performing further qualitative and quantitative anal-ysis with OCTA images. However, few studies9 11 on artifacts and segmentation errors have been carried out, especially in DR using wide-field SS-OCTA. The aim of our study was to specifically evaluate wide-field SS-OCTA image quality, artifacts, and segmentation errors in DR, as well as to

Divergent Retinal Vascular Abnormalities in Normotensive

pressure (BP) with a wide spectrum of both qualitative and quantitative retinal vascular signs of physiological sta-tus, such as vascular branching, fractal dimension, vascu-lar tortuosity, arterial and venular caliber, and the vascular wall-to-lumen ratio.2,3 Prospective studies have shown that subjects with such retinal microvascular