Thank you for your reply and for the feedback. I read the article which deals with the heart valve. Fortunately, I don’t have that issue. I have only one artery with a cholesterol issue, the LAD. All of my tests, and they were extensive, showed a heart working well especially for a female my age — no symptoms. I’ll continue to watch for additional research and info for K2 and heart disease. In the meantime, I’ll follow my doctor’s recommendation. It can’t hurt.