This may confirm the hypothesis that the disturbances of retrobulbar circulation may appear as a response to systemic pressure alteration, conceivably occurring as a vascular spasm or vasoconstrictive
The intravascular volume expansion was believed to prevent the adverse effect of contrast media administration by 2 distinct mechanisms: (1) reducing the vasoconstrictive
effect of contrast media on renal medulla by suppression of vasopressin secretion, inhibition of renin-angiotensin-aldosterone system, and increase of prostaglandin synthesis, and (2) attenuating the direct toxic effect of contrast media on renal tubular epithelial cells by decreasing proximal tubular salt and water reabsorption which results in diluting the intratubular fluid and reducing the intratubular viscosity .
2]-adrenergic agonist that is very vasoconstrictive
These alterations encompass many factors that have been implicated in the pathogenesis and progression of atherosclerotic plaques, such as endothelial dysfunction; increased endothelial cell adhesiveness and permeability; increases in procoagulant, vasoconstrictive
, and inflammatory molecules; increases in cytokines and chemokines; increased oxidative stress; and proliferation and migration of smooth muscle cells (2).
41) Conversely, vasoconstrictive
substances such as norepinephrine cause vascular cells to release prostaglandins that increase the permeability of vascular smooth muscle resulting in vasoconstriction.
19) Similarly, a reduction in eNOS may be associated with the increased effect of vasoconstrictive
mechanisms, such as RhoA/Rho-kinase, similar to that observed in patients with diabetic ED.
We have demonstrated for the first time that the sympathovagal balance assessed by HRV was correlated with the skin vasoconstrictive
response to postural changes.
Octreotide is a somatostatin analogue with potent vasoconstrictive
effects and is useful in the treatment of orthostatic disorders.
The indispensable and fundamental role of endogenous Nitric Oxide is its function as a signaling molecule in maintaining basal vascular tone and the hypoxic vasoconstrictive
8) As a class, topical corticosteroids have anti-inflammatory, antiproliferative, immunosuppressive, and vasoconstrictive
properties that effectively control AD flares.
Amongst 18 % patients of 2nd group during conducting of test for reactive hyperemia it was registered the paradoxical vasoconstrictive
reaction, indicating a more expressed endothelial dysfunction.
Its etiology, is unknown nowadays despite the existing theories, being the most accepted the theory about the superficial invasion of the cytotrophoblast in the blood vessel spirals during the placenta formation, giving as a result the preservation of the elastic muscle fibers in the artery and its capacity to respond to different vasoconstrictive
agents, anon existing situation in normal pregnancy.