I'd be curious to know what you find out, if you don't mind posting back. It helps me learn. Thanks, and I'll be thinking about you and hoping for the best.
Thank you for the response. I have an appointment with a cardiologist.
"Marked" means the opposite of mild. I would think that the actual significance of this to your life and health depends on the degree to which the calcification impairs the functioning of the valve. It sounds like you need to have a detailed talk with your doctor. If I were in your position and did not already have a cardiologist, I would get one.