I've had pulsatile tinnitus in my right ear for about five years. I went to hospital outpatients again and again and nothing works. Had endless hearing tests, an MRI scan, and tried a white noise generator, but it's still the same.
It's easier to live with now, because I'm used to it, but being aware of your heartbeat is a bit panic-inducing at times.
It's psychological they say, because my brain has decided not to tune it out anymore. They've more or less decided it's linked to my PTSD and left it at that. Nowhere else to go with it.