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29 Cards in this Set

  • Front
  • Back

Arteriosclerosis

Hardening of the arteries

atherosclerosis

hardening of arteries due plaque formation

LDL is oxidized, which causes

plaque formation

Three tunicas

Adventitia, media, and intima

The progression

Fatty streak foam cells, fibrous plaque, occlusive plaque, plaque rupture and thrombosis

Claudication occurs with

Occlusive plaque

In severe CAD, lumen

Is very narrow

Men or women get more LAD stenosis?

Men

More cholesterol leads to

More CHD events in later years, particularly with LDL cholesterol

1mg/dL decrease in HDL leads to

2% higher in men and 3% higher in women for disease

CHD factors injure

The endothelium

Polyunsaturated fats, like other lipids, are especially susceptible to

Peroxidation

Oxidized LDL causes

Fragmentation of Apo B, loss of amino acids, not recognized by LDL receptor, lyscholine chemotaxicity for monocytes,

Oxidation of LDL leads to less and more of

NO, ACE

HDL can remove

Oxidized LDL and reduce it by CEPT transfers. Liver takes up these reduced HDLs faster than LDLs.

Foam cells form from

Macrophages

Plaques release

Cytokines, cause inflammation

LDL is modified in the

Arterial wall

MPC1 is

Monocyte Chemiotic factor, makes monocytes into macrophages

Macrophage growth factors promote

Cell matrix degradation

HDL inhibits

Adhesion molecules so fewer monocytes attracted, oxidative modification of LDL, formation of foam cells

CRP causes

Inflammation, may lead to CVD, but does not cause CVD. CRP made in the liver.

What increase risk of CVD?

High carbs, sat or trans fats, dyslipidemias,

What quantity of LDLs affects the risk of CVD?

More, smaller LDLs makes more likely to have CVD.

Most MIs are actually due to what arteries?

Non-obstructive

Vulnerable plaques

Thin fibrous, lipid rich, inflammatory

Stable plaques

Thick fibrous, smooth muscle cells with more extracellular matrix, lipid poor

Statins reduce

Artherosclerosis by reducing LDL levels. Also decrease plaque volume.

Lifestyle changes like fat, exercise and stress control

Also reduce artherosclerosis