DOCTOR'S VIEW ARCHIVE
Heart Disease Risk and C-reactive Protein (CRP)
C-reactive protein (CRP) is elevated in the blood when there is widespread inflammation somewhere in the body. The evidence now available indicates that inflammation and molecules such as C-reactive protein associated with inflammation may be as important as cholesterol in determining the development of atherosclerosis ("hardening of the arteries") and heart disease.
Although C-reactive protein is clearly an important marker of inflammation, it is not at all clear why inflammation should elevate C-reactive protein levels. Some researchers have suggested that a chronic infection with certain bacteria or viruses may raise the C-reactive protein.
LDL ("bad") cholesterol levels have long been known to be associated with an increased risk of heart attack (and an increased risk of death from heart disease). The same now seems true for elevated levels of C-reactive protein. People whose C-reactive protein levels are in the upper third of the population have double the risk of a heart attack than people with lower C-reactive protein levels.
Inflammation likely contributes to heart disease by teaming up with the LDL ("bad") cholesterol which is deposited in the plaques that adhere to blood vessel walls and impede blood flow. The inflammatory process may damage these plaques, allowing tiny portions of plaque to break off into the bloodstream. These small fragments of plaque can then be swept away to lodge in small blood vessels in the heart or brain, causing a heart attack or stroke.
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