Driver, who becomes the latest first-team player to leave Tynecastle, will join the Dynamo on loan until his Hearts deal expires in the summer.
A statement on the club website read: "The club wishes Andrew all the best as he continues his career with this fantastic opportunity to play in America."
But manager John McGlynn told Hearts News: "The situation is much better than we anticipated.
"The doctor is very positive about Darren, so much so that he could be in contention for the Inverness game on Saturday.
"Darren will continue to be assessed daily, but absolutely no risks will be taken with him."
Meanwhile, Darren Barr could face Inverness in the Clydesdale Bank Premier League on Saturday despite suffering a nasty head injury against Kilmarnock last weekend.
Barr was carried off on a stretcher and was given oxygen as well as staples in a wound after a collision of heads with Wilson.
But manager John McGlynn told Hearts News: "The situation is much better than we anticipated.
"The doctor is very positive about Darren, so much so that he could be in contention for the Inverness game on Saturday.
"Darren will continue to be assessed daily, but absolutely no risks will be taken with him."























