Hi, Jennifer and James,
I agree, the pulsating is certainly no fun to live with, and I have been trying to find ways to cope for the past 3 years. However, don't give up! The thing to do is to keep searching for answers. Some people have been cured of this condition; it's just that many doctors are dismissive of us because they don't know, or don't have the time, to treat us or figure out what is going on. Have you checked out Whooshers.com? It is a support community for those of us with PT, and has many stories of "cured whooshers"!
There are specialized doctors out there who have taken the time to help PT sufferers. These doctors may be otolaryngologists or neurotologists, and are often at teaching hospitals, such as Johns Hopkins or places like that. It's worth at least having tests to rule out any serious conditions that might be causing your PT. The head "whoosher" on Whooshers.com suggests getting copies of your tests (MRI, CT scan, etc.) and circulating them to one or two of these specialists to see if they can help you.
There is also the possibility that your pulsating tinnitus will subside over time. That has happened to some people. Who knows, it might happen to you!