--have to go out and tutor the panicky SAT students--but you can look up and find that most of the time, an increase in blood flow velocity in an artery is an indication of narrowing of that artery, not uncommon as we age and certainly not uncommon in those with diabetes.

Narrow arteries are, of course, more susceptible to thrombosis (blood clot blockage). And they are associated with peripheral artery disease--again, extremely common.

But, this is probably not an emergency situation--it is something that needs to be monitored and perhaps treated (exercise and oxygenation are very good for this, as one would suspect). But I wouldn't panic just yet. That's for my SAT students.