Coronary artery calcium is associated with degree of stenosis and surface irregularity of carotid artery.
Lee KB, Budoff MJ, Zavodni A, Polak JF, Jeffrey Carr J, Burke GL, Herrington DM. Coronary artery calcium is associated with degree of stenosis and surface irregularity of carotid artery. Atherosclerosis. 2012 Jul; 223(1):160-5.