Safe yoga poses for heart patients

I am having trouble finding information on safe yoga poses for heart patients. I am recovering from a heart attack a few months ago, and would like to return to doing yoga, but am quite fearful of overdoing anything. However, everyone seems afraid of the topic (liability?). I actually have formal training as a yoga teacher, but this isn't a subject that was covered. All I can find are expensive seminars on the subject, which I am not interested in attending due to Covid concerns. It seems like this is a subject that would have a simple do's and don'ts list of yoga poses, based on where you are at in recovery. Has anyone seen this kind of information publicly available?