arteriole

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arteriole

[är′tir·ē‚ōl]
(anatomy)
An artery of small diameter that terminates in capillaries.
References in periodicals archive ?
7] On the one hand, long-term hypertension results in lipohyalinosis of the media and thickening of the vessel walls, and narrowing of the lumen of the arterioles and small perforating arteries that are derived from cortical and leptomeningeal arteries and nourish the deep WM.
Seven patients died, and postmortem analysis of GI tissues displayed fibrinoid necrosis of terminal arterioles within the deep mucosa, extravasation of fragmented red blood cells (RBCs) around affected vessels, and extensive crypt depletion in the tip of mucosal folds.
The vasoconstrictor response initiated by a1-adrenoceptor activation in arterioles appears to be very complex and also involves autocrine signaling mediated by ATP release through pannexin channels.
Retinal arterioles that become permanently occluded typically have a silver wire appearance.
2,6,10) In the retinal vasculitis type, the refractive or nonrefractive yellowish Gass plaques which may be evident in the retinal arterioles are an important diagnostic finding for the disease.
26 Arteriolopathy results in obliteration of arterioles and necrosis + sclerosis of the corresponding glomerulus and associated parenchyma.
The pathologic diagnostic criteria for calciphylaxis utilized at the Mayo Clinic require skin biopsy evidence of medial calcification and intimai fibroplasia of pannicular arterioles with cutaneous necrosis.
These arterioles appeared finer, lighter in color and sometimes more tortuous than veins.
Other mechanisms of Amphotericin B induced nephrotoxicity suggested in the literature are direct toxic effects to the afferent arterioles and tubules and direct renal and systemic vasoconstriction.
The diffuse presence of thrombi in the arterioles results in microcirculatory collapse, which finds expression in the eventual ischaemic compromise of the organ systems in which it occurs.
As subsequent generations of these pulmonary vessels emerge, the smooth muscle fibers diminish as the small arteries evolve into pulmonary arterioles where ultimately the vascular smooth muscle fibers completely disappear.
Granulomatosis with polyangiitis (GPA) previously known as Wegner's granulomatosis, is a small vessel vasculitis that preferentially involves capillaries, arterioles and venules, presenting as multisystemic disease classically with alveolar haemorrhage and renal insufficiency.