Publications by authors named "Christian N Ramsey"

Background: Emergent large vessel occlusive (ELVO) stroke secondary to underlying carotid occlusive disease is frequently encountered in endovascular ischemic stroke therapy and trials. Up to 29% of all cerebral vascular accidents are attributed to severe carotid occlusive disease, and recent interventional trials have demonstrated this occurrence in 18.6-32.

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Objectives: The goal of this study was to investigate carotid plaque characteristics in symptomatic versus asymptomatic patients with the use of nonocclusive optical coherence tomography (OCT).

Background: The identification of asymptomatic patients with carotid disease who are at risk of stroke remains a challenge. There is an increasing awareness that plaque characteristics may best risk-stratify this population.

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A 67-year-old man with medically refractory vertebrobasilar insufficiency and short segment occlusions of the intracranial vertebral arteries was treated with angioplasty and stent placement. Fifteen hours after the procedure the patient developed symptoms of posterior fossa ischemia and repeat angiography showed thrombus formation within the stent which was treated with thrombolytic and aggressive antiplatelet therapy. Angiography revealed lysis of the clot, but concerns regarding the mechanism of the thrombotic phenomenon prompted frequency-domain optical coherence tomography (FDOCT) assessment.

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A 67-year-old man with medically refractory vertebrobasilar insufficiency and short segment occlusions of the intracranial vertebral arteries was treated with angioplasty and stent placement. Fifteen hours after the procedure the patient developed symptoms of posterior fossa ischemia and repeat angiography showed thrombus formation within the stent which was treated with thrombolytic and aggressive antiplatelet therapy. Angiography revealed lysis of the clot, but concerns regarding the mechanism of the thrombotic phenomenon prompted frequency-domain optical coherence tomography (FDOCT) assessment.

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Aneurysmal subarachnoid hemorrhage (SAH) accounts for a significant percentage of morbidity and mortality among patients admitted to neurosurgical centers throughout the world. Even for individuals surviving beyond the initial presentation and intervention for aneurysmal SAH, the occurrence of cerebral vasospasm has the potential to induce a second tier of complications that can be just as devastating as the inciting event. However, despite numerous studies and some initial advancements in management, therapeutic modalities are limited to help prevent or treat this complex entity.

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Intrathecal granuloma formation has commonly been described with morphine therapy. It has been suggested that a high concentration of intrathecal morphine may be responsible for this complication. Much less commonly, intrathecal hydromorphone has been associated with intrathecal granuloma formation.

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Among cavernomas of the central nervous system, spinal ones are rare. The true incidence of spinal cavernomas is unclear, but with widespread use of magnetic resonance imaging the number of cases is increasing. Furthermore, cavernomas represent only 5-12% of all vascular anomalies of the spinal cord, with a mere 3% reported to be intradural and intramedullary in location.

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Ophthalmological problems such as papilledema, loss of visual acuity, and oculomotor palsies are common in patients with shunt malfunctions. The authors report on three patients with shunts who presented with visual loss. In each case, the diagnosis of shunt malfunction was delayed because other classic signs and symptoms of intracranial hypertension were absent.

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The emergence of multidrug-resistant bacteria as the cause of ventriculoperitoneal shunt infections is a disconcerting phenomenon that often requires the use of alternative antimicrobials due to resistance against commonly used agents. The following is a case report describing the successful treatment of a ventriculoperitoneal shunt infection caused by a heteroresistant strain of Staphylococcus aureus with linezolid. Linezolid may have utility in treating pediatric CNS infections due to its tolerability, excellent blood-brain barrier penetration, and activity against multiple resistant Gram-positive organisms such as S.

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