hello. thanks for posting here. I have gone through your description. 60% blockages are considered non critical. The carotid arteries supply the brain. When you had a TIA a small clot may have been formed at the blockage area and later traveled towards your brain. So you need to be on anti platelet medications which will prevent the clot from forming. Endarterectomy is usually not done for 60% stenoses. In the future if the block increases in severity, a carotid stenting can be offered. Endarterectomy is a surgery and usually is done if angioplasty fails or is not possible. At present you need to be on medical management. Also the RCA has a 60%stenosis which again is non critical and should be managed on medications. You should be prescribed antiplatelet medications and statins which lower the cholesterol so as to prevent these cholesterol deposits in your arteries from increasing. You have many risk factors for heart disease like smoking, high BP, diabetes so you have to continue your BP and diabetic medications along with the above and try to quit smoking. Wishing you Good health Regards.