Cholesterol plaque is the formation of a hard, thick substance within the artery walls which is caused by deposits of cholesterol in the artery walls. During exercise or excitement, the blocked coronary arteries cannot increase the blood supply to meet the increased oxygen demand of the heart muscle. Thus the heart muscle is deprived of blood oxygen. This may result in chest pain or angina pectoris. When the narrowing in the artery becomes critical, unstable angina may result.
Unstable angina can be the warning of a heart attack in the near future.
The victim may experience chest pressure. There maybe profuse sweating and jaw pain. The victim feels nauseated. Shortness of breathe. First Aid Treatment Put the victim in the most comfortable position and loosen the clothing at the neck, chest and waist.