Arteriosclerosis is the stiffening or hardening of artery walls. Atherosclerosis is the narrowing or contracting of the artery because of plaque build-up. In many cases, it results in coronary artery disease, stroke, other heart diseases, or kidney problems. When LDL cholesterol collects on the artery wall, several chemical changes occur. This leads to inflammation which is one reason for arteriosclerosis. When plaque grows for a long time, it forms a fibrous cap. This cap when breaks down, forms a blood clot which blocks the flow of blood and triggers heart attack.
These are some common risk factors for a heart attack. Genetics play an important role in defining the risk of a person for getting a heart attack. High cholesterol leads to thinning of arteries which often leads to heart attack. Diabetes, obesity, etc are also other important risk factors that increase the chances of a heart attack. People suffering from high blood pressure also are at a higher risk. Some other factors which lead to heart attack are stress, lack of physical activity, consumption of alcohol, smoking, autoimmune disorders, etc.