Learning Objective:

By the end of this section, learners should be able to explain how hyperlipidemia contributes to the development of atherosclerosis and increases the risk of cardiovascular and cerebrovascular diseases, and identify the therapeutic goal of lowering LDL cholesterol to reduce atherosclerotic plaque formation.

Key Concepts:

Hypercholesterolemia, particularly elevated low-density lipoprotein (LDL) cholesterol, is strongly associated with the development of atherosclerosis.

• Excess LDL cholesterol accumulates within the arterial intima, where it undergoes oxidation and promotes:
  • Endothelial dysfunction
  • Inflammatory cell recruitment
  • Foam cell formation
  • Progressive development of atheromatous plaques
• These plaques can narrow arterial lumens and reduce blood flow, increasing the risk of:
  • Coronary artery disease (e.g., angina, myocardial infarction)
  • Cerebrovascular disease (e.g., transient ischemic attack, ischemic stroke)
  • Peripheral arterial disease

The primary goal of antihyperlipidemic therapy is to:

• Reduce LDL cholesterol levels
• Slow or prevent the progression of atherosclerotic plaque formation
• Lower the risk of cardiovascular and cerebrovascular events

Activity

Activity