Hi, may I answer your health queries right now ? Please type your query here... Two years ago, my cardiologist gave me a (duplex) test that showed no plaque buildup in the left carotid & 20 % on the right. Recently, he gave me another that showed 60 - 79% on left and 40% on right. I am 64 years old, female, not overweight, with established heart disease. I am appalled at the pace at which this condition has changed. What is the typical pace at which plaque builds in the carotid and, at the rate I'm going, can I expect the left carotid to be blocked significantly more in even a year?