**1. Introduction**

168 Aneurysm

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Wu IH, Liang PC, Huang SC, Chi NS, Lin FY, Wang SS. (2009). The significance of endograft geometry on the incidence of intraprosthetic thrombus deposits after abdominal

outflow conditions. *Ann Biomed Eng*.; 28:1281-99.

endovascular grafting. *Eur J Vasc Endovasc Surg*.;38:741-7.

AAA is the thirteenth cause of death in UK accounting for 1.2% of male and 0.6 of female mortality, and the third cause of sudden death after coronary artery disease and stroke. [1-3]

Abdominal aortic aneurysms are identified in the elderly population; only a few patients die because of AAA rupture prior to the age of 60. The incidence of the disease in the general population is 60/1000 inhabitants [4] and between 1.8% and 6.6% in autopsies studies. In studies of natural history of AAA the rate of aneurysm rupture and death could exceed 60% within 3 years of the initial diagnosis. [5]
