I want to know about scope of postgraduate study in cardiology (Diploma / masters) in Sweeden , Norway, Austria, Bulgeria and Hungary for non EU medical graduates.

here's an idea, try searching on the internet!!!
you know, maybe Google or Yahoo; hell, you could even try some university websites for the countries you listed.
just a suggestion...

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KAY RICO,
Sorry to say,for your information,every one in the world knows there are Yahoo,Google,Aol serach engine.
He did not ask about search engine.
There are thousands websites which are not DIRECTLY listed .
So if any doctor knows about Diploma in Cardiology,please put all informations here.thanks