Breasts in Armpits, Large Gap Between? (photo)

I think you will need the breast pockets revised.  I am not personally a fan of high profile implants because they can contribute to the problem you have in terms of the "gap"; moderate profile would be a better solution.  Since people don't walk around with their hands over their heads regularly (unless they are under arrest) a photo with your hands at your sides would be much more helpful in evaluating your condition and making a recommendation.

Lots of information here, sometimes revision surgery works and sometimes it makes things worse. You really need to think about how much time,money, and energy you want to put into this!

An implant is designed to add volume to the breasts, nothing more.  It is not designed to change the basic shape of the breast.  Looking at your before and after pictures, it appears that you had a fairly wide cleavage before your surgery that did not change afterwards.  This is because you have a very wide chest bone.  If you feel over that chest bone you will feel skin and bone.  I have seen patients who have come through my door where a doctor has tried to give them better cleavage by undermining the skin over the chest bone.  Only bad things result from this.  First, there is very little tissue coverage over the implant and any little ripple/wrinkle can be seen/felt in this area.  Secondly, the implant is not centered behind the nipple/areola but rather more towards the middle of the chest.  This results in the nipples pointing towards opposite walls.  For patients with a wide chest bone, I usually don't mess with trying to give them more cleavage using an implant.  That is the purpose of push-up/push-in bras. 

Now, if you lie on your back and your implants slide out into your armpits, that is a different issue.  In this case, there is not enough support for your implants laterally.  This may require a second surgery to tighten up the outside portion of the breast pocket so that the implants don't migrate outwards when you lie down.