| PRP | physiologic rest position; pityriasis rubra pilaris; platelet-rich plasma; polyribosyl ribitol phosp... |
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| PSR | pain sensitivity range; perspective surface rendering; portal systemic resistance; proliferative sic... |
| ROP | removal of pins or plates; removal of plaster [of Paris]; retinopathy of prematurity; right occipito... |
| VSR | venous stasis retinopathy |
| CRB | chemical, radiological, and biological; congenital retinal blindness |
| vascular anticoagulant | <protein> Group of calcium-binding proteins that interact with acidic membrane phospholipids in membranes. They contain 4 or 8 repeats of a 61 amino acid domain that folds into 5 a helices. Also known by several other names (e.g. Lipocortins, endonexins), reflecting the history of their discovery in different contexts. See: lipocortin, endonexin I & II, calpactin, p70 and calelectrin. (18 Nov 1997) |
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| vascular bud | An endothelial sprout arising from a blood vessel. (05 Mar 2000) |
| vascular bundle | Strand of vascular tissue in a plant, composed of xylem and phloem. (18 Nov 1997) |
| vascular cambium | Lateral meristem that forms the secondary tissue and is located between the xylem and phloem. (09 Oct 1997) |
| vascular capacitance | The relationship between the volume of blood contained within a segment of vasculature and the pressure distending the vascular walls over a wide range of pressures and volumes. The veins of the body are not only conduits for the return of blood to the right heart, but they also determine most of the vascular capacitance and contain most of the blood volume. Changes in vascular capacitance provide a quick and effective mechanism for the filling of the right heart, thereby influencing cardiac output. Vascular capacitance is somewhat analogous to vascular resistance but whereas vascular resistance relates to flow through a blood vessel, vascular capacitance relates to the volume contained in it. (12 Dec 1998) |
| vascular cataract | Congenital cataract in which the degenerated lens is replaced with mesodermal tissue. Synonym: cataracta adiposa, cataracta fibrosa. (05 Mar 2000) |
| vascular cell adhesion molecule-1 | Cytokine-induced cell adhesion molecule present on activated endothelial cells, tissue macrophages, dendritic cells, bone marrow fibroblasts, myoblasts, and myotubes. It is important for the recruitment of leukocytes to sites of inflammation. (12 Dec 1998) |
| vascular circle | The circle around the mouth formed by the inferior and superior labial arteries. Synonym: areolar venous plexus. (05 Mar 2000) |
| vascular circle of optic nerve | <anatomy, nerve> A network of branches of the short ciliary arteries on the sclera around the point of entrance of the optic nerve. Synonym: circulus vasculosus nervi optici, circulus arteriosus halleri, circulus zinnii, Haller's circle, Zinn's corona, Zinn's vascular circle. (05 Mar 2000) |
| vascular cones | The coiled portion of the efferent ductules that constitute the head of the epididymis; these join the ductus epididymidis. Synonym: lobuli epididymidis, coni epididymidis, coni vasculosi, Haller's cones, vascular cones. (05 Mar 2000) |
| vascular dementia | A state of diminished cognition that is the results from repeated cerebral strokes with a step-like deterioration in intellectual functions with focal neurological signs, as the result of multiple infarctions of the cerebral hemispheres. Synonym: multi-infarct dementia. (07 Mar 2000) |
| vascular dentin | Dentin in which the primitive capillaries have remained uncalcified and so are wide enough to give passage to the formed elements of the blood. Synonym: vascular dentin. (05 Mar 2000) |
| vascular endothelial growth factor | A growth factor that is responsible for the growth of blood vessels. (12 Dec 1998) |
| vascular fistula | <surgery> An abnormal passage in a blood vessel, between two or more arteries, or between an artery and a vein. (12 Dec 1998) |
| vascular fold of the caecum | <anatomy> A peritoneal fold that arches over a branch of the ileocolic artery and bounds in front a narrow recess, the superior ileocaecal (or ileocolic) recess. Synonym: plica caecalis vascularis. (05 Mar 2000) |