I started out at 174.1kgs, I was sleeved 13 months ago and currently down to 110.8kgs and still losing.
I had minor obesity related illnesses to what you have, I have osteo arthritis between T3 and T4 which still gives me issues but not to the point it did when I was heavier. I had high blood pressure and arrythmia that I no longer take medication for. Actually I am med free (apart from some nurofen when the back plays up).
Good luck with it all, its certainly changed my life around!