An article I read suggested that blockages in the 70 percent and above range should be considered for surgery. Since your blockage is below those numbers, maybe your doctor could suggest you eat a healthy diet. Also if you are not on a steady exercise program designed specifically for you, he or she might suggest you get on one. If you have high cholesterol, they may even suggest you take a statin drug to help control it. I was recently diagnosed with 80 percent blockage of my right Carotid Artery. My Cardiologist says test indicate that the blockage is in my right neck. He told me that a preferred procedure called carotid angioplasty and stenting was not applicable in my case. So I must have a surgery called carotid endarterectomy that is performed by a specialist. It involves making an incision in the front of the neck to get to the artery and clean it out.