Retinal changes in malignant/accelerated hypertension.
نویسندگان
چکیده
منابع مشابه
Systemic hypertension produces pericyte changes in retinal capillaries.
PURPOSE The purpose of this study was to examine retinal capillaries and their pericytes that previous research suggests to be contractile. A contractile role regulating capillary blood flow may be more apparent when the vasculature is subjected to the stress of systemic hypertension. METHODS Using ultrastructural morphometry and the myosin subfragment-1 technique, retinal capillaries of norm...
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DESPITE a vast amount of work devoted to the subject the nature of the fundamental hemodynamic changes in chronic, human hypertension is poorly understood. In this necessarily brief discussion the main outlines of the problem will be sketched in emphasizing the respective roles of the heart, large arteries and resistance vessels. Other factors such as the sympathetic nervous system, the barorec...
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It is customary, in dealing with the problem of hypertension, to divide it roughly into two groups-"primary" or "essential" hypertension, and "renal" hypertension, the latter being secondary to diseases of the urinary system. This group comprises not only states of renal insufficiency due to glomerular and tubular injury, but also a variety of extra-renal conditions which may lead to urinary re...
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PURPOSE The authors retrospectively analyzed changes in the retinal nerve fiber layer in patients with idiopathic intracranial hypertension and studied their relation to visual field loss to determine the clinical usefulness of retinal nerve fiber analysis in the clinical management of patients with papilledema. METHODS Retinal nerve fiber layer photographs and visual fields from 36 eyes of 2...
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Methods The retinal vessel system is divided in four quadrants, each with five parts of vessels, which consist of parallel connected vessels with similar physiological relations in each case. By means of nonlinear flow pressure relations you can verify in separate vessels bloodflow, velocity of blood, decrease of pressure and flow resistance. Values founded by measurement technique are used as ...
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ژورنال
عنوان ژورنال: BMJ
سال: 1986
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.292.6518.483