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Perimesencephalic hemorrhage.

Among 293 subarachnoid hemorrhages admitted to the Neurology and Neurosurgery departments of Sta Maria Hospital, 108 patients had a normal cerebral angiography. Twenty-three meet the radiological criteria for perimesencephalic hemorrhage (center of the hemorrhage located in front of the mesencephalon, without blood in the interhemispheric and lateral sylvian fissures, nor significant intraventricular hemorrhage...

Embolotherapy in aneurysm of the basilar artery.

A case of an aneurysm of the tip of the basilar artery in which occlusion of the sac with a detachable silicone balloon was performed, is reported. The indications and pitfalls of the technique are discussed. ; A case of an aneurysm of the tip of the basilar artery in which occlusion of the sac with a detachable silicone balloon was performed, is reported. The indications and pitfalls of the technique are disc...

Intra-arterial occlusion of renal arteriovenous fistula using a detachable ball...

Several intra-arterial embolization techniques with polimerization substances, particles, thrombogenic coils and silicone and latex balloons have been used in the endovascular therapy of arteriovenous fistulas in different vascular territories. Using the Seldinger technique by femural route and with a coaxial system including a microcatheter with a latex Debrun type balloon, the authors describe the selective o...

Intravascular therapy of giant cerebral aneurysm.

The endovascular therapy in cerebral aneurysms has met significant technical progress, specially related with new microcatheters and different types of detachable balloons. Reviewing seven cases of giant cerebral aneurysms treated by intra arterial approach, the authors present their results pointing out and discussing the different angiosurgical therapy that can actually be used. ; The endovascular therapy in...

Imaging findings in hypertensive encephalopathy.

Hypertensive encephalopathy is a neurologic syndrome caused by a marked and rapid rise of blood pressure above baseline levels. Efficacy of current anti-hypertensive drugs greatly diminished the frequency of this situation in which diagnosis is essentially based on clinical parameters. This can justify the few papers found in radiologic literature. Nevertheless it is sometimes important to exclude ischemic or h...

The endovascular treatment of cerebral arteriovenous aneurysms and malformations.

Despite the progress made in cerebral aneurysm microneurosurgery, some morphologic and anatomic characteristics, or also clinical reasons, make surgical clipping of the aneurysmatic column difficult or unfeasible, justifying an endovascular therapeutic alternative. Despite the great progress made, the risk of endovascular intervention with microballoons is significant, particularly in the acute post-haemorrhagi...

Neurocysticercosis. An imaging analysis of 35 cases.

Neurocysticercosis (NCC) is the most frequent parasitic disease of the central nervous system. Other Portuguese works showed it to be endemic in the north of our country. The purpose of this paper is to aid the characterization of NCC in the geographic area of our Institution. We retrospectively reviewed the findings of computed tomography (CT) in 35 patients with NCC, including 23 adults and 12 children. There...

Neuroradiology in the physiopathologic diagnosis of subarachnoid hemorrhage--ce...

The clinical importance of the cerebral aneurismatic lesion in well known. In Portugal we still do not have reliable statistics regarding the occurrence of the subarachnoid hemorrhage, however we can make a comparison through Kassel's and Drake's studies where they refer that annually 28,000 North-Americans suffer from subarachnoid hemorrhage attributed to the rupture of the cerebral aneurysm. This is a clinica...

Nimodipine in subarachnoid hemorrhage.

The efficacy of nimodipine in decreasing mortality and morbidity of subarachnoid haemorrhage (HSA) is evaluated in 51 patients admitted to the Neurological and Neurosurgery Departments of the Santa Maria Hospital. Reductions of 2 x (0.65, 6.39) of the incidence of ischemia in the total group and of 2.1 x (0.58, 7.79) of mortality in the sub-group with initial severity of less than 4 points of the Hunt score wer...

Role of endarterectomy in the secondary prevention of cerebrovascular accidents...