I have a Norweigian ForestCat Kitten and he was just neutered and during the operation the vet saw the EKG monitor was not right he quickly finished and woke him up and repeated the EKG 3 hours later and it still showed abnormal rhythms. I am taking him back in a week for another EKG, he said it MAY be Cardiac Myopia. The vet also said the larger breeds are more prone to this, Maine Coon, Himalayn. Has anyone ever had a cat with this, what is the life expectancy?