A New Approach to Natural Lift Curves of The Spherical Indicatrices of Timelike Bertrand Mate of a Spacelike Curve in Minkowski 3-Space

Bertrand curves are one of the associated curve pairs for which at the corresponding points of the curves one of the Frenet vectors of a curve coincides with the one of the Frenet vectors of the other curve

The Natural Lift Curve and Geodesic Sprays in Euclidean 4-Space

In this work, we presented the natural lift curves of the spherical indicatrices of a curve in E4. Also, some interesting results about the original curve were obtained depending on the assumption that the natural lift curves should be the integral curve of the geodesic spray on the tangent bundle T(S2 )

WARFARIN INCREASES THE RISK OF VASCULAR CALCIFICATION IN HAEMODIALYSIS PATIENTS: A MULTICENTER CASE-CONTROL STUDY

57th ERA-EDTA Congress -- JUN 06-09, 2020 -- ELECTR NETWORKUstuner, Evren/0000-0003-0932-1508; Sadioglu, Rezzan Eren/0000-0001-9761-0320WOS: 000562392100273[No abstract available]ERA, EDT

Warfarin is associated with the risk of vascular calcification in abdominal aorta in hemodialysis patients: a multicenter case-control study

Background/aim: Vascular calcifications (VCs), recognized risk factor for increased mortality, are highly prevalent in hemodialysis (HD) patients. We aimed to investigate the relation between VC and warfarin use with plain radiography. Materials and methods: VCs were assessed using Adragao (radial and digital) and Kauppila (aortic) scores in 76 HD patients from six centers. Out of a total 711 HD patients, there were 32 (4.5%) who had been treated with warfarin for at least 1 year, and we included 44 control patients. Results: Of the patients, 47% were females, the mean age was 66 +/- 9 years, 23% were diabetics, the mean dialysis vintage was 68 +/- 38 months. In warfarin group, median Kauppila score was higher than in control group [11 vs 6.5, (25%-75% percentile, 5 vs. 15), p = 0.032] and the percentage of the patients with a Kauppila score of >6 was higher, as well (76.6% vs. 50%; p = 0.029). Median Adragao score was not significantly different between the two groups [7 vs. 6, (%25,%75 percentile 6 vs. 8), p = 0.17]. Logistic regression analysis revealed that warfarin treatment was independently associated with Kauppila scores of >6 (OR 3.60, 95% CI 1.18-10.9, p = 0.024). Conclusion: In this study, we found that warfarin is associated to vascular calcifications, especially in aorta of HD patients

Plasma viscosity and mean platelet volume in patients undergoing coronary angiography

Background: Markers of platelet activation and haemorrheological indices have been demonstrated to play a role in the pathophysiology of atherosclerosis and cardiovascular events. In this study, we aimed at investigate the association between plasma viscosity and platelet indices in patients undergoing coronary angiography. Materials and methods: Three hundred and eighty four consecutive patients scheduled to undergo coronary angiography were included in the study. Prior to coronary angiography, blood samples were withdrawn to determine routine biochemical markers, blood cell analyses and viscosity measurements. According to the results of coronary angiography, patients were classified either in a subgroup with coronary artery disease (CAD; 1 or more stenoses > 50%) or normal coronary arteries (NCA; no stenoses or <50%). Results: There was a statistically significant correlation between plasma viscosity and mean platelet volume levels in all patients undergoing coronary angiography (r = 0.199, p <0.001). Additionally, when correlation analysis was performed within each group, plasma viscosity significantly correlated with MPV both in patients with CAD (r = 0.18, p = 0.004) and in patients with NCAs (r = 0.272, p = 0.002). Linear regression analysis revealed that plasma viscosity was positively associated with MPV while platelet number was inversely but significantly associated with MPV. Conclusion: We have shown for the first time that MPV correlates with plasma viscosity in patients undergoing coronary angiography, suggesting a relation with plasma proteins and activation of circulating platelets or peripheral consumption of platelets. To evaluate this relation further controlled studies also in patients with acute coronary syndromes are warranted