@billw822026 Keep in constant touch with a sympathetic and conscientious cardiologist who will agree to monitoring you at least once annually. At some point, you're going to run into a permanent and untreatable closure of that one side that is already at 70%. If I were in your shoes, I would begin pestering my cardiologist for a stent/bypass just about six weeks ago now. It needn't happen six weeks ago, but maybe in six months your story will change and you are beginning to experience symptoms. So, what I'm suggesting is that you should have that specific discussion with your cardiologist about a timeline, or at least when he/she'll do another scan/imaging and at point point would you need to have an intervention. This information will help to allay any fears you might have growing roots.

@billw822026 we can't diagnose you only a cardiologist can do that! They will take further images to see if surgery is warranted. None of what you suggested is helpful IF you have a genetic predisposition. A cardiologist will order images to be taken of your heart and brain valves and find out IF there is a particular area needing surgery. Or maybe, only suggest a baby aspirin. (wouldn't that be nice!) So your next step is clear. Get your butt into a cardiologist!