Coronary artery plaquesBy Mayo Clinic staff
Original Article: http://www.mayoclinic.com/health/medical/IM03626
Coronary artery plaques
Atherosclerosis (ath-ur-o-skluh-RO-sis) is hardening and narrowing of the arteries caused by the accumulation of fatty deposits (plaques) and other substances. A blood clot also may form at the site, completely blocking your artery and causing a heart attack.