Cardiac Pathophysiology Practice Test

The pathophysiology of atherosclerosis is characterized by the buildup of plaque in the arteries. Atherosclerosis involves the accumulation of fatty substances, cholesterol, cellular waste products, and calcium within the arterial walls, leading to the formation of plaques known as atheromas. These plaques can narrow the arteries and harden the arterial walls, which increases the risk of cardiovascular events such as heart attacks and strokes.

This process begins with endothelial injury, which can be caused by factors such as hypertension, smoking, and high cholesterol levels. Over time, this injury allows low-density lipoproteins (LDL) to penetrate the endothelium, triggering an inflammatory response that attracts monocytes and T-lymphocytes. These cells transform into macrophages, which engulf the LDL particles and become foam cells, further contributing to plaque formation.

As the plaques grow, they can restrict blood flow and may eventually rupture, leading to thrombosis, which can completely block blood flow. Therefore, the buildup of plaque represents a significant aspect of atherosclerosis and is central to understanding the disease's progression and associated risks.