Mechanisms of formation and growth of intracranial aneurysms are poorly understood. To investigate the pathophysiology of intracranial aneurysms, an animal model of intracranial aneurysm yielding a high incidence of large aneurysm formation within a short incubation period is needed. We combined two well-known clinical factors associated with human intracranial aneurysms, hypertension and the d...

BACKGROUND AND PURPOSE We evaluated several hemodynamic parameters for the prediction of rupture in a data set of initially unruptured aneurysms, including aneurysms that ruptured during follow-up observation. METHODS Aneurysm geometry was extracted from CT angiographic images and analyzed using a mathematical formula for fluid flow under pulsatile blood flow conditions. Fifty side-wall inter...

Renal artery aneurysms are the second most common visceral artery aneurysms after splenic artery aneurysms, and before hepatic artery aneurysms. The study presented a case of a ruptured giant right renal artery aneurysm in a female patient. The presented case is worth mentioning, due to the giant size of the lesion. The diameter of the aneurysm exceeded 10 cm. Available literature data mentione...

Posterior inferior cerebellar artery (PICA) aneurysms are rare. The most common complication of intracranial aneurysms is rupture causing subarachnoid hemorrhage. Ischemic infarct, although more common in giant thrombosed aneurysms, is a very rare manifestation of small intracranial aneurysms. Here we describe a patient who presented with lateral medullary acute infarction associated with an ip...

acoma aneurysms are complicated and high incidence lesions. the successful treatment depends on understanding the anatomical location of aneurysm. the early surgery and selecting the superior method of surgery and post-operative cares affect the surgical outcomes of these patients. in this study 30 patients who were admitted to firoozgar hospital in a 3-year period (2001-2004), undergone surger...

BACKGROUND AND PURPOSE The HydroCoil Embolic System (HES) was developed to improve the efficacy of endovascular treatment of cerebral aneurysms. The purpose of this study is to study the periprocedural results in patients with cerebral aneurysms treated with HES. METHODS We report the initial periprocedural results in 191 cerebral aneurysms treated with HES in the HydroCoil for Endovascular A...

CT angiography (CTA) has improved significantly over the past few years such that the reconstructed images of the cerebral arteries may now be equivalent to conventional digital angiography. The new technology of 64 slice multi-detector CTA can reconstruct detailed images that can reliably identify small cerebral aneurysms, even those <3mm. In addition, it is estimated that CT followed by lumba...

Autopsy studies suggest that splanchnic artery aneurysms may be more frequent than abdominal aortic aneurysms. These aneurysms are important to recognize because up to 25% may be complicated by rupture, and the mortality rate after rupture is between 25% and 70%. However, little is known about the natural history and clinical presentation of splanchnic artery aneurysms. Splenic artery aneurysms...

BACKGROUND To report the authors' experience with recurrent aneurysms after primarily completely clipped cerebral aneurysms and discuss mechanisms of recurrence and recommended management. METHODS Data were available for 1016 consecutive patients who underwent clipping of ruptured and unruptured aneurysms in a 15-year period from 1993-2007. RESULTS Nine patients were treated for recurrent a...

BACKGROUND AND PURPOSE Many cases of subarachnoid hemorrhage are due to rupture of small cerebral aneurysms. Our purpose was to evaluate the usefulness of helical CT angiography (CTA) in the detection and characterization of very small (<5 mm) intracranial aneurysms. METHODS One hundred eighty consecutive patients underwent CTA for suspected intracranial aneurysms. All aneurysms prospectively...