I had a lot of health issues in my last job too (most of which, it turns out, were in fact CAUSED by the stress of the job), so you have my sympathies.
The truth is, employers are generally prohibited by law from dishing dirt on former employees; all they can really say is whether or not you'd be eligible for rehire. If you are not, you'll probably have to explain this to any potential employer; it's usually best to be honest, but vague. You can simply say you had some health problems that have since been resolved, and that you anticipate no further issues in the future.
Good luck, and keep us posted.........believe me, it IS possible to find employment again!!