Fatty streak

Fatty streak is the earliest visible lesion of atherosclerosis, a disease of the arteries characterized by the deposition of fatty material on their inner walls. The fatty streak is characterized by a change in the color of the arterial wall to yellow due to the accumulation of lipids or fats.

Formation

The formation of a fatty streak is the first step in the development of atherosclerosis. It begins with the damage to the endothelium, the innermost layer of the artery. This damage can be caused by various factors such as high blood pressure, smoking, or high levels of cholesterol in the blood. Once the endothelium is damaged, lipids begin to accumulate in the arterial wall, leading to the formation of a fatty streak.

Progression

Over time, the fatty streak can progress to a more advanced stage of atherosclerosis known as a fibrous plaque. This occurs when smooth muscle cells migrate from the middle layer of the artery to the fatty streak. These cells proliferate and produce collagen, forming a fibrous cap over the fatty streak. This cap can rupture, leading to the formation of a thrombus or blood clot, which can block the artery and cause a heart attack or stroke.

Prevention and Treatment

The prevention and treatment of fatty streaks involve lifestyle changes and medications. Lifestyle changes include quitting smoking, eating a healthy diet low in saturated fats and cholesterol, and getting regular exercise. Medications such as statins can be used to lower cholesterol levels in the blood, reducing the risk of fatty streak formation.

See Also

• Atherosclerosis
• Endothelium
• Cholesterol
• Heart attack
• Stroke

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