What factors would predict a long term successful EVAR?

Ricky, how much is it predictable that an endovascular repair will have a complication or not be durable in terms of the anatomy of the aorta? So, I guess endovascular aorta repairs have been really going on since about 1992 now, there or thereabouts. So we're getting an increasing worldwide evidence base about who is going to do well and who's not going to do well. And it's increasingly appearing as though the key factor in predicting a durable and long-term successful outcome in EVAR is based on the anatomy of the aorta. So we know, for example, that if the aorta is particularly dilated where the stent graft is going to have to seal the proximal neck or if the aortic neck is particularly angulated or if it's very tortuous or if it doesn't have parallel walls or if it has a lot of calcium associated with it all of these factors point to future problems with leakages and slippages of the stent graft. So a patient with poor aortic anatomy will be well advised to have a long think about going for what's on the facelift, the easy option, compared to having an open repair which will be much more robust and durable at the expense of a much bigger operation. But if that same patient has very good anatomy for the endovascular repair, they'd be well advised to seriously consider having that because they're much more likely to get a good outcome in the long term. Boom.