Coronary heart disease of the heart (CHD) characterized by a limited supply of oxygen to the heart muscle, clinical manifestations ranging from angina to myocardial infarction (MI) and sudden death. The main cause of CHD is coronary atherosclerosis (ATS), injury due to lipid-rich deposits on the inner lining of the coronary arteries. This process begins early in life as “streaks of fat”, and later fibrous lesions are often calcified and ulcerated, which reduce the arterial lumen. If the lesion is a thrombus superimposed, it can precipitate MI and sudden death occur. These cases (more…)
Archive for the ‘Coronary Disease’ Category
coronary heart disease and lipoproteins
Wednesday, June 16th, 2010Posted in Coronary Disease | No Comments »
Coronary Heart Disease
Tuesday, May 25th, 2010
The coronary arteries supply blood to the heart muscle. Like other tissues of the body, the heart muscle needs oxygen-rich blood to function, and blood to which oxygen is taken must be expelled. The coronary arteries consist of two main arteries: the right and left coronary arteries. The system of the left coronary artery branches into the circumflex artery and left anterior descending artery.
What are the different coronary arteries?
The two main coronary arteries are the left coronary artery and right coronary arteries. The left coronary artery (the acronym in English is LCA), which is divided into anterior descending and circumflex branch, supplies blood to the heart’s left ventricle and left atrium. The right coronary artery (RCA, for its acronym in English), which is divided into the artery right posterior descending and acute marginal arteries, supplies blood to the right ventricle, right atrium and the sinoatrial node (cluster of cells in the wall of the right atrium that regulates the rhythm of the heartbeat). (more…)
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Coronary Disease
Sunday, March 7th, 2010
Coronary artery disease is the most murderous in Western countries. It kills 600,000 people each year in the USA. Although it develops slowly over many years, instant death (sudden death) in one third of cases.
Blood vessels that carry oxygen and nutrients to the heart muscle itself (or infarction) are small and form a crown around the heart (hence the name of vessel “coronary”).
Coronary heart disease starts when small blood vessels in these calls develop atherosclerotic plaques (see atherosclerosis), which are an accumulation of cholesterol, calcium and other substances in the vessel walls. Then he commits a greater or lesser degree the flow of oxygen and nutrients to the heart itself, with effects ranging from angina or myocardial infarction, even heart failure. (more…)
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