Both carotid arteries are 40% blocked (according to the man who administered the test). Someone else will read the scan again and make a final decision and send the results on to Scott's cardiac doc. He said doctors don't (and my sister and the internet sites I've found concur) do anything until there is a 70% blockage. They won't do surgery either if it's totally blocked. So for now we just wait. At this point my biggest concern is that he will have one of the TIA's while he's driving. Nina