Saturday, April 13, 2013

What is Coronary Heart Disease (CHD)?

Lycette Clarke 09/03/2004

What is Coronary Heart Disease (CHD)?

CHD has two principal forms - angina and mall attacks (myocardial infarction). Both occur because the arteries behaveing countercurrent to the center of attention vigour become blocked or narrowed, usually by a deposit of fatty substances, a process known as coronary-artery disease. Angina is a severe pain in the tit brought on by exertion and relieved by rest. A heart attack is due to obstruction of a coronary artery either as a result of arteriosclerosis or a blood clot: part of the heart muscle is deprived of oxygen and dies.

Basic diagram of the heart as a system

Diagrams from: http://www.pbs.org/wgbh/nova/eheart/human.html

The blockage of the arteries with the excess plaque make by roll of tobacco, alcohol consumption, age (as you run short older your stake factor increases) and diet, sex (males are more likely to get CAD), hereditary and the combined contraceptive pill and fat intake

http://www.heartcenteronline.com/myheartdr/ commons/articles.cfm?ART

This diagram shows the build up of a blockage in an artery. This is most due to the build up of colestral and fats that deposit on the wall of the artery. Colestral is a waxy fat (lipid) which is carried through the blood by lipoproteins.

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The two main types of lipoprotein, high-density lipoproteins (HLDs) and low density lipoproteins (LDLs)

HLDs (good colestral) carry LDLs (bad colestral) away from the artery walls. LDLs stick to artery walls and can atomic number 82 to plaque build-up, or arteriosclerosis

Risk factors leading to Coronary Heart Disease

Cigarette smoking, raise blood cholesterol and high blood pressure are the most firmly established, non-hereditary take a chance factors leading to CHD with cigarette smoking being the most important of the known modifiable risk factors for CHD, according to the US Surgeon General. A cigarette tobacco user has two to three times the risk of having a heart attack than a...

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