How much does an artery have to be blocked before a doctor orders an angioplasty.  I am 66 and just had a 64slice ct done on my heart.  I have a mild to moderate blockage in one artery all the others are clear.  The cardiologist is recommending a pet stress test.
On conventional angiography, not on ct angiography, which you underwent more 80% block is treated with angioplasty. In your case since your lesion is mild to moderate, may be treating doctor wanted to know the significance of blockage. If test is positive then you will be subjected to angioplasty.