Local Spasm in Cerebral Arteries
نویسندگان
چکیده
منابع مشابه
Global coronary arteries spasm in a young patient
BACKGROUND Coronary artery spasm is a transient narrowing of coronary arteries that slows or stops blood flow through the artery. CASE REPORT We present a 42-year-smoker man without any medical problem who developed syncope. Coronary angiography revealed diffuse significant narrowing of proximal left anterior descending artery (LAD), 90% osteal stenosis of large obtuse marginal (OM), 90% diff...
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In contrast to effort-induced symptoms in obstructive coronary disease, spasm in normal coronary arteries is characterized by angina at rest. We describe a 44-year-old patient with minor coronary plaques and pure exercised-induced coronary spasm. The case questions the differential pathogenic considerations of variant of the variant as opposed to Prinzmetal's variant angina.
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A Model for Experimental Cerebral A rterial Spasm • Vasospasm of the basilar artery of the dog was induced by subarachnoid injection of arterial blood through the cisterna magna. Cerebral angiography was employed to evaluate quantitative assessment of the spasm. Chronic vasospasm was successfully induced in 100% of surviving dogs. Biphasic vasoconstriction was observed. The acute phase occurred...
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were independently controlled by two servo-controlled pumps, and changes in the diameter of the segment were registered by an automated video technique. In the absence of flow, these segments maintained their diameter when intraluminal pressure was changed over the range 30-90 mm Hg. When intraluminal pressure was low (30 mm Hg), flow at 20 pl/min caused dilation. This is half the rate of flow ...
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are major determinants of local microvascular pressure. Recent studies have shown that resistance of large arteries and cerebral microvascular pressure are affected by several physiological stimuli, including changes in systemic blood pressure, increases in cerebral metabolism, activity of sympathetic nerves, and humoral stimuli such as circulating vasopressin and angiotensin. Stimuli such as s...
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ژورنال
عنوان ژورنال: Journal of Neurosurgery
سال: 1960
ISSN: 0022-3085
DOI: 10.3171/jns.1960.17.1.0090