The Causes Of Rising Cholesterol In The Blood
There is no clear scientifically proven explanation as to exactly how a diet high in saturated fat could be the cause of rising cholesterol in the blood. We also do not know precisely how cholesterol can develop heart disease. There is however a very plausible theory which has a large following in the scientific community.
The LDL connection
It begins with a high level of LDL cholesterol. Excess levels of LDL cholesterol usually cause some of the excess cholesterol to move towards the artery walls. The higher the LDL levels, the more cholesterol moves out of the bloodstream and into the blood vessel walls. Rigidity of the artery walls may determine how much cholesterol might stay on the artery walls. Smoking, high blood pressure, diabetes, as well as other influences like stress might constrict artery walls. This can result in a disruption in the flow of blood as well as pressure. When this occurs, artery walls can weaken or become scarred in the first layer of the lining allowing LDL to further embed into the artery walls.
The role of swelling
This sets off a chain reaction in which the body effectively sabotages itself. Inflammation flares up in the affected region causing White blood cells or macrophages to rush to the scene. The macrophages absorb the cholesterol and get engorged further blocking the blood vessels. These cells continue to call for even more reinforcements causing even more congestion for the blood circulation. The macrophages are designed to destroy infectious microbes and then vanish are fighting Lipids which by their very nature are being constantly reproduced. A never ending battle rages. This leads to a steady and continuing state of inflammation inside the artery wall. At some point the overloaded macrophage is destroyed and all the cholesterol and inflammatory substances are released into the artery wall.
Eventually the body forms a cap of sorts over the inflamed wall section. This cap forms plaque that starts the state of atherosclerosis and the shrinking of the artery opening and resultant constriction in the blood circulation. If this occur in an artery that leads to the heart, it can impede the blood circulation to the heart. This restriction however does not usually cause a heart attack. Plaque deposits are full of inflammation and LDL. Immune cells, T-lymphocytes and macrophages, are the most severe in terms of containing inflammatory cells. If the plaque deposit has a thin cap, it is more certain to rupture.
Ruptures are the common cause of heart attacks.
Should a plaque cap rupture, blood will seep into the artery wall. The normal wound response mechanism begins and clotting agents are transported to the area. Platelets enter the wound to create a scab that inside an artery wall is life threatening. This scab or clot inside an artery is known as thrombus. It could cut off blood circulation and oxygen to the heart muscle. The section of the heart which is deprived of oxygen rich blood starts to die. This is how cardiac arrest occur. The medical term is known as a myocardial infarction.
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