The way I see it, there are 5 factors involved in strokes and bodybuilding.
Diet, training/cardiovascular, genetics, AAS, and supplement regime. The extent to which each affects an individual could vary quite substantially.
I would like to believe AAS do not impact health, but my bloodwork would seem to indicate that this is not the case.
That said, with a healthy diet, exercise, and supplement regime one can win the health battle, even while using AAS. I myself am winning the cholesterol battle as we speak.
Here is one thing that has always made me wonder a bit though. If we compared steroid users at age 40 to the rest of the population, would there be more strokes and heart attacks in users compared to non-users? I'm not sure there would be a statistically significant difference. So many people, both AAS and non-AAS users will experience such an event. Unfortunately, I haven't seen any literature on the subject and I doubt any exists.
The bottom line is this: Use, do not abuse; get regular bloodwork done; take the necesarry precautions and be safe.