Atherosclerosis: When Your Arteries Fight Back
Think of your arteries like motorways - when they get clogged with debris, traffic (blood flow) slows to a crawl. Atherosclerosis happens when cholesterol, fat, and other substances form plaque inside your arteries, making them narrower and reducing oxygen-rich blood flow to vital organs.
This process starts with damage to the endothelium (the smooth lining inside blood vessels). High blood pressure creates more damage, attracting white blood cells, cholesterol, and platelets to the injury site. The cholesterol gets oxidised, triggering an inflammatory response where immune cells try to "digest" the cholesterol buildup.
As the plaque grows larger, smooth muscle cells and fibrous tissue create a hard cap on top, like a scab. This makes the artery's lumen (inside space) much smaller, limiting blood flow and increasing pressure. Eventually, this leads to dangerous complications.
Key Point: You can't change age, gender, or genetics, but you absolutely can tackle obesity, diabetes, smoking, high blood pressure, and poor diet - the changeable risk factors that accelerate this process.
The real danger comes when plaque ruptures. This can cause heart attacks (when coronary arteries can't supply enough blood to heart muscle), strokes (when brain arteries are blocked), or aneurysms (when weakened arteries bulge and potentially burst, causing massive internal bleeding).
