Please Help

Hello,
I just found this forum and need advice or information from anyone. Two nights ago I rushed my beautiful, healthy, happy, 4 yr old male cat, Scooby to the emergency center. He was diagnosed with those crystals blocking his urinary track. The vet immediately took him into surgery and I am told there was no problem with the actual surgery but as soon as I arrived home I received a call from the vet saying Scooby had died. I was told that when Scooby awoke from the anesthesia he was so frightened that he went crazy, scratching and crying then collapsed. He just died.

Scooby was not a timid cat and had been to the vet before. He had been neutered at six months with no reactions or problems to anesthesia. I just don't understand and maybe it's my grief and anger over losing him but I am suspicious. I have been in rescue work for years and have never heard of a cat so frightened and wild after anesthesia that they die. Please has anyone ever heard of this occurring? Any information might ease our family's grief. We are in such shock and just devastated. Thanks for any help.

Lesa