I have just had a echo heart scan and been told the main artery going into my heart is tight was does this mean?

Echocardiogram: I may be wrong, but Unless you had a stress test echocardiogram, I doubt the echocardiogram would show any coronary artery features but most likely demonstrated pathology of the aortic valve. If this is so, you will have a significant heart murmur.Of course, your physician knows all your tests and can advise you best. A stress echocardiogram can diagnose coronary artery blockage, though.