I hadn't seen this before today and hurried through the posts...hoping for a positive update.
A quick google search brought me to the Washington State University school of veterinary medicine. Not sure how close they are to you or if they can provide "better" treatment than the cardiologist you are presently seeing.
Dilated Cardiomyopathy (DCM)
I read on another site....early detection and treatment allows for a better prognosis. I hope so in Winky's case.
I am so sorry to hear his diagnosis. Sending big prayers to Winky and the family.