NURS307 Chapter Notes -Cerebral Angiography, Valsalva Maneuver, Hemiparesis

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2 Sep 2014
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Bleeding in brain tissue, ventricles or subarachnoid space. Uncontrolled hypertension can lead to primary intracerebral hemorrhage from spontaneous rupture of small vessels (~80% of this type of stroke) Ruptured intracranial aneurysm (weakened arterial wall bursting) can cause subarachnoid hemorrhage. Higher risk for males and with older age. When the brain is exposed to blood it"s normal metabolism is disrupted either because of increased intracranial pressure or secondary ischemia due to reduced perfusion pressure and vasospasm. Aneurysm or arteriovenous malformation (avm) causes symptoms by pressing on cranial nerves or brain tissue or by rupturing and causing a hemorrhage in the cranial subarachnoid space. Nuchal rigidity (rigidity of the back of the neck) Rigidity of the spine because of meningeal irritation. Visual disturbances occur when avm is adjacent to oculomotor nerve (visual loss / diplopia. = double vision / ptosis = drooping of the upper or lower eyelid) Hemiparesis (weakness of one side of the body) *norman experienced this on the train*

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