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Hyperlipidemia is abnormally high levels of any or all lipids (e.g. fats, triglycerides, cholesterol, phospholipids) or lipoproteins in the blood. [2] The term hyperlipidemia refers to the laboratory finding itself and is also used as an umbrella term covering any of various acquired or genetic disorders that result in that finding. [3]
Hypercholesterolemia, also called high cholesterol, is the presence of high levels of cholesterol in the blood. [1] It is a form of hyperlipidemia (high levels of lipids in the blood), hyperlipoproteinemia (high levels of lipoproteins in the blood), and dyslipidemia (any abnormalities of lipid and lipoprotein levels in the blood). [1]
[2] The average amount of blood cholesterol varies with age, typically rising gradually until one is about 60 years old. There appear to be seasonal variations in cholesterol levels in humans, more, on average, in winter. [3] These seasonal variations seem to be inversely linked to vitamin C intake. [4] [5]
The cholesterol controls the clustering of amyloid precursor protein with gamma secretase in GM1 lipid domains. [15] High cholesterol induces APP hydrolysis and the eventual accumulation of amyloid plaques tau phosphorylation. The ApoE isotype4 is the greatest risk factor for sporadic Alzheimer's and this allele was shown to increase ...
High cholesterol is defined as having a total cholesterol number of 240 mg/dL or above. Someone has borderline cholesterol, meanwhile, when their total cholesterol is in the 200 to 239 range .
The lipid hypothesis (also known as the cholesterol hypothesis) is a medical theory postulating a link between blood cholesterol levels and the occurrence of cardiovascular disease. A summary from 1976 described it as: "measures used to lower the plasma lipids in patients with hyperlipidemia will lead to reductions in new events of coronary ...
Several genetic conditions cause abnormally low or high HDL-C levels, often without the expected change in cardiovascular disease rates. In fact, when many known correlates of CVD risks are controlled for, HDL-C does not have any correlation with cardiovascular event risks.
A diagram explaining factors affecting arterial pressure. Pathophysiology is a study which explains the function of the body as it relates to diseases and conditions. The pathophysiology of hypertension is an area which attempts to explain mechanistically the causes of hypertension, which is a chronic disease characterized by elevation of blood pressure.
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