Aneurysms relatives

Raaymakers TW (1999). Aneurysms in relatives of patients with subarachnoid hemorrhage frequency and risk factors. MARS Study Group. Magnetic Resonance Angiography in Relatives of patients with subarachnoid hemorrhage. Neurology 53 982-988... 

Suxamethonium-induced fasciculation or increased muscle tone can be dangerous in patients with fractures or dislocations (especially vertebral, when the drug is relatively contraindicated), in patients with open-eye injuries or after the eyeball is opened surgically, when an increase in abdominal pressure must be avoided (pheochromocytoma, aortic aneurysm, full stomach, ileus), and in patients in whom a rise in arterial pressure may be catastrophic (cerebral aneurysm, raised intracranial pressure). Prolonged paralysis, occasionally lasting hours, is a risk if the patient is, or has been, taking certain drugs. 

Shape memory polymers make up another class of injectable biomaterials for vascular applications, yet are relatively new in the field of endovascular embolization. Shape memory polymers are chemically structured so that they are able to reversibly take on a different physical shape in response to some stimuli (Small et al, 2007). Usually these different shapes include a compact form and an expanded form of the polymer. In the case of endovascular embolization, the expanded polymer can be pre-formed to fit specific contours of an individual aneurysm (Ortega et al, 2007). Upon interacting with some type of stimuli, such as heat or cold, the material is compacted into a shape that can be delivered through a microcatheter. The process of using shape memory polymers to embolize an aneurysm is shown in Fig. 7.5, along with samples of expanded SMPs (Ortega et al, 2007). 

The author has used percutaneous CT guided thrombin injection in six patients where pancreatitis associated aneurysms could not be seen at selective angiography. The technique is relatively simple, the aneurysm being punctured with a 21-Gauge saline flushed needle under CT guidance... 

Mehta M, Veith FJ, Ohki T, et al. (2001) Unilateral and bilateral hypogasteric artery interruption during aortoiliac aneurysm repair in 154 patients a relatively innocuous procedure. J Vase Surg 33(suppl) S27-32... 

The first treatment option in ruptured aneurysms should be via the endovascular route if judged feasible by the neurointerventionalist Wide necked aneurysms are less prone to rupture compared to small necked aneurysms First degree relatives of patients with SAH have a much higher risk of harbouring an aneurysm compared to the normal population... 

The most plausible pathogenetic theory is that they are acquired due to hemodynamic stress on the relatively unsupported bifurcations of cerebral arteries (Timperman et al. 1995). This is supported by the clinical observation that many patients with an anterior communicating artery (Acorn) aneurysm do have one hypoplastic or absent Al segment and thus an increased hemodynamic stress on the AcomA. Other factors than hemodynamics and structural alterations of the vessel wall contributing to the development of saccular aneurysms may be genetic, infection, trauma, neoplasms, radiation or idiopathic. 

In other words, the incidence of intracranial aneurysms is between 8% and 9% in persons with two or more relatives who have had an aneurysm or a SAH (RAAYMAKERSetal. 1998b RONKAINEN et al. 1997). This was confirmed by Ok amoto et al. (2003). They found that the SAH risk was elevated when (1) any first degree relative had a positive episode of SAH,... 

Screening in high risk patients (first degree relatives of patients with SAH or multiple aneurysms, patients with polycystic kidney disease or with connective tissue disease)... 

Aneurysms of the posterior cerebral artery (PCA) are relatively rare compared with those in other locations. Extremely rare are singular berry aneurysms of the PCA. Often, this type of aneurysm is either associated with the incidence of multiple aneurysms or with other vascular disorders like ar-terious-venous-malformations, moyamoya disease or ipsilateral internal carotid occlusion for various reasons. Other rare causes are infectious and post-traumatic conditions. Some authors figured out that the incidence of PCA aneurysms is approximately... 

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