While Having An Echo Cardiogram The Technician Asked If I

While having an echo cardiogram the technician asked if I ever had stents put in. I have not. Why would she ask this but not elaborate? I had the test because my Dr felt that my heart murmur seemed louder than before. I am also having tightness in the chest,shortness of breath and occasional dizzy spells and he feels I could be suffering from nonrhuematic aortic valve stenosis insufficiency. I have not gotten back the results yet and I am getting nervous.