Saccular aneurysm are also called berry aneurysm

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Saccular aneurysm are also called Berry aneurysm, actually they take the form of small thin walled blisters protruding from arteries of the circle of willis or its major branches. 288
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Aneurysm are generally presumed to result from developmental defects in media and elastica. Aneurysmal rupture most commonly takes place in the “circle of willis” aneurysm. Mycotic aneurysm - Mycotic aneurysm is caused by a septic embolus that weakens the wall of the vessel in which it lodges. 289
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Most common cause of subarachnoid hemorrhage is a) Hypertension (AIIMS Dec 98) b) Berry aneurysm c) Intracranial tumors d) Arterio-venous malformations (AVM) B 290
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Q Q) The most common site of Berry aneurysm is - a) Junction of anterior communicating (AI 94) artery with anterior cerebral artery b) Junction of posterior communicating artery with internal carotid artery c) Bifurcation of middle cerebral artery d) Vertebral artery 291
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M.C. cause of subarachnoid hemorrhage  Rupture of saccular aneurysm. M.C. site of saccular aneurysm  Anterior circulation of circle of willis. 292
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The most common sites in descending order of frequency of Berry Aneurysm are:- Proximal portion of anterior communicating artery . (at the junction of anterior communicating artery with cerebral artery). At the origin of the posterior communicating artery from the stem of the internal carotid artery. At the first major bifurcation of middle cerebral artery. At the bifurcation of internal carotid into middle and anterior cerebral arteries. Vertibrobasilar bifurcation (3%). 293
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Q Q) The most common site of Berry aneurysm is - a) Junction of anterior communicating (AI 94) artery with anterior cerebral artery b) Junction of posterior communicating artery with internal carotid artery c) Bifurcation of middle cerebral artery d) Vertebral artery A 294
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Berry aneurysm - Defect lies in - (AIIMSMay 11) a) Degeneration of internal elastic lamina b) Deposition of mucoid material in media c) Defect in muscular layer d) Disturbance in vessel wall B 295
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Cerebral Ischemia occur when cerebral blood flow is less than - (AI 12) a) lOml/lOOg/minute b)20ml/100g/minute c) 40ml/100g/minute d)50ml/100g/minute 296
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Cerebral autoregulation during stroke:- Cerebral autoregulation is impaired during some diseases including ischemic stroke. As cerebral perfusion pressure falls, cerebral blood vessels dilate to increase cerebral blood flow. A decrease in perfusion pressure beyond the ability of the brain to compensate results in a reduction in cerebral blood flow. Initially the oxygen extraction fraction is increased in order to maintain levels of oxygen delivery to the brain.
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  • Winter '16
  • jean grey

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