So, dummy is - A9 A2 - ; declarer - 2 Q5 A ; and west - J10 K4 - ; so just lead A♣ and west has to give up , if he bares K♦ you pitch a ♥ and if he pitch a ♥ you pitch a ♦ . True vienna would be if East in ...
not necessary 6-4, i was thinking about 6+C and 4D but probably possible 7-5 , maybe that hand could start with 2C. And what is your minimum for doubling 1H with 6-4 ?