Summary
Atherosclerosis builds plaques from cholesterol and inflammation, narrowing arteries and risking clots.
In depth
LDL enters the artery wall, is oxidised and engulfed by macrophages forming foam cells and plaques. Rupture triggers thrombus causing heart attack (myocardial infarction) or stroke. Risk factors: smoking, hypertension, diabetes, high LDL.
Endothelial damage begins plaque formation. Hypertension and smoking worsen it. Prevention includes diet, exercise and drugs.
Example: LDL oxidation triggers inflammation.
Atherosclerosis begins with endothelial injury (high blood pressure, smoking, high LDL, diabetes), then LDL particles enter the intima and oxidise, monocytes become macrophage foam cells, smooth muscle cells migrate and form a fibrous cap over a necrotic lipid core. Thin-cap plaques are prone to rupture and trigger clots, producing myocardial infarction or stroke. Stable plaques narrow vessels and cause angina. Inflammation (CRP) plays a role, and the CANTOS trial showed that blocking IL-1 beta lowered events.
Risk factors: age, genetics, smoking, hypertension, high LDL, low HDL, diabetes, obesity, inactivity. Treatments: statins, antiplatelets (aspirin), antihypertensives, PCSK9 inhibitors, angioplasty with stents, bypass surgery. Heart failure, arrhythmias, and valve disease are other forms. Cardiovascular disease is the leading cause of death worldwide.
Example: chest pain radiating to the left arm and jaw with sweating is a typical sign of a heart attack and needs emergency help.
Frequently asked questions
What is Cardiovascular Disease Mechanisms?
Atherosclerosis builds plaques from cholesterol and inflammation, narrowing arteries and risking clots.
Which area of biology covers Cardiovascular Disease Mechanisms, and how advanced is it?
Cardiovascular Disease Mechanisms is one of the 51 topics in Human Physiology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Diabetes Mellitus, Circulatory System, Blood Clotting.
Can you give an example of Cardiovascular Disease Mechanisms?
Statins lower LDL and risk of events.
What should I learn before Cardiovascular Disease Mechanisms?
Work through the Beginner topics in Human Physiology first, such as Homeostasis, Tissues and Organs, Skeletal System, then return to Cardiovascular Disease Mechanisms. Advanced topics assume the Intermediate vocabulary.
What topics are related to Cardiovascular Disease Mechanisms?
The closest topics to Cardiovascular Disease Mechanisms are Diabetes Mellitus, Circulatory System, Blood Clotting, Blood Pressure. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Cardiovascular Disease Mechanisms?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Cardiovascular Disease Mechanisms. To practise the whole of Human Physiology, use the Human Physiology quiz.
How is Cardiovascular Disease Mechanisms different from Diabetes Mellitus?
Cardiovascular Disease Mechanisms: Atherosclerosis builds plaques from cholesterol and inflammation, narrowing arteries and risking clots. Diabetes Mellitus: Type 1 results from loss of insulin-making cells and type 2 from insulin resistance, both leaving high blood glucose. Read both side by side and note what each one explains.
How should I study Cardiovascular Disease Mechanisms step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Diabetes Mellitus and explain the difference aloud. Finally, take the Human Physiology quiz and come back to this page for any question you miss.