With other procedures, such the carotid stenting, are those radiologists requirements changing?
Yes, I think that s an area where you are going to see a lot of overlap of practice. For years, when carotid arteriography was done, it was done by whoever was the dominant force in a hospital doing most of the diagnostic arteriography. In most hospitals across the U.S. that was the radiology department and that could either be a general angiographer or a neuro-angiographer or somebody with training in neuroradiology. In either case, it was usually in the hands of radiologists. In the last few years there has been a lot more aggressive behavior on the part of the cardiologists who happen to have patients on the table for coronary catheterizations and then have just done a little bit more anatomic searching with or without a clinically symptomatic reason to do so. The result has been an increase in interest in catheter-based treatments for carotid disease instead of just subjecting everybody to carotid end arterectomy. That has gotten a lot of folks interested the neurosurgeons, the vas
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