Advices before treatment travel

Hi all
Since 2008 my son has a heart surgery to solve one of two problems in his heart, now the doctors are thinking to do the second surgery, before that I will try to have other opinion, so I am thinking to travel to a Europe country  for example Germany or Italy to do check up for my son, may be they have other opinions. So I am looking to any advice or recommendation from you, such as:
Which Europe country is the best in heart pediatrics?
Any advice before travel?
Any advice on hospitals?
Any advice on accommodation (cheap and good)?
Any other advices could help me?
Many thanks to all

Great Ormond Street hospital in London is one of the world's best specialist children's hospitals. Here's the link:

GOSH

Our thoughts are with your son, get better soon!

First of all , I wish your son recover soon .
I can advice you istanbul ,
acommodation and hospital payments cheaper than europan countries .
regards

thanks sandman6, your advice is very helpful and it is the first thing in my list.