I'd agree with most of what blankall is saying, but with some differences.
In a time where I'm sure everyone is trying to be empathetic/optimistic and sugar coat everything, I'm going to be slightly blunt with you, because I suspect you might want some hard answers.
His prognosis depends entirely upon where the bleed occurred, how much blood was released, and where the blood went. Every patient is different, but the older we get, the less resiliant the brain is. I suspect things are pretty bad if he's been put into a medically induced coma - this is often done when there is frank brain swelling, and they need to attempt to control the resultant increase in intracranial pressure. At this stage there is not much more that they can do to intervene, short of some potential surgical decompressions if things get really bad and salvation might be possible. If the bleeding is from a ruptured aneurysm, the blood often tracks very intimately around the brain, throughout it's many crevices, making it nearly impossible to manually remove the blood. This free blood itself is rather caustic to adjacent arteries, causing vessel spasm, which occludes distal blood supply to other areas of the brain (more strokes). The so called "clot busting" drugs are not an option for this man, as these strokes are not caused by clots. Furthermore, rapidly breaking up any clots he has, might be like opening up a dam in areas that were bleeding before but have stopped because of the clotting.
For the most part it is a waiting game. If there is encouraging progress, you are looking at weeks. Either the brain will recover enough on it's own to wean him from his life supports, or it will not. If it looks like there is no positive progression, end of life decisions will have to be faced. Sadly, in the older adults, many do not recover, and if they do, they are not without lasting deficits.
With respect to your girlfriend, she and her family needs to reflect on whether or not there is a family history of intracranial aneurysms in the past; she may already qualify in getting herself screened for un-ruptured aneurysms. Obviously this does not need to be done right away, but it is important that it does not become forgotten in the ensuing events. These things can be like ticking time bombs, waiting to burst. If caught before however, interventions that can be performed to "defuse" them before this happens.
Hopefully this helps
________
Marijuana
Aneurysms
