can slowly build up in the inner walls of the arteries that fed the heart and vein. Together with other substances‚ it can form plaque‚ a thick‚ hard deposit that can narrow the arteries and make them less flexible. This condition is known as atherosclerosis. About one fourth to one third of cholesterol is carried by high density lipoproteins‚ HDL is known as “good” cholesterol‚ because high levels of HDL seem to protect the heart. Collins‚ 2012 A desirable cholesterol level is said as less than
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failure and peripheral vascular disease. Atherosclerosis is the underlying cause of most of these conditions. This is the build-up of fatty and/or fibrous material on the interior walls of arteries. This build-up hinders the flow of blood to the body’s tissues and also acts to increase blood pressure. Often‚ the build-up occurs in patches known as atheroma (thickened area of fatty and fibrous deposits on the inside surface of arteries‚ resulting in atherosclerosis) or plaque‚ and is characterized by presence
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arterial wall becomes thicken and loses elasticity. Atherosclerosis is the most common and serious vascular disease. Plaques (atheromas) deposited in the walls of arteries are major causes of heart disease‚ chest pain (angina pectoris)‚ heart attacks‚ and other disorders of the circulation. In atherosclerosis yellowish plaques of cholesterol‚ fats‚ and other remains are deposited in the walls of large and medium-sized arteries. Atherosclerosis usually occurs with aging. It is linked to overweight
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4 CIRCULATORY SYSTEM The circulatory system contains several very different components‚ including the heart‚ a hollow muscular pump that stands at the operational center of the system that pumps liquid blood throughout the body through three types of flexible tubes‚ the blood vessels (Fig. 4.1). The arteries channel blood from the heart to all parts of the body needing service. Once there‚ the blood passes through narrow arteries and enters the capillaries‚ which are the narrowest blood vessels
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still very high with more than 12500 deaths in under 65 age group in 2008 (British Heart Foundation). CHD‚ such as angina or heart attack is caused by a narrowing of the coronary arteries by fatty deposits‚ leading to atherosclerosis or hardening of the arteries. Atherosclerosis is the main cause of CVD but there is a strong link between developing CVD and physical inactivity‚ high blood pressure‚ unhealthy diet with consumption of saturated fats‚ stress and smoking (World Health Organisation).
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failure‚ atherosclerosis‚ cardiovascular disease‚ and cardiac arrhythmias. Other forms of cardiovascular disease include congenital heart defects‚ cardiomyopathy‚ infections of the heart‚ coronary artery disease‚ heart valve disorders‚ myocarditis‚ and pericarditis. Symptoms of cardiovascular disease vary depending on the specific type of cardiovascular disease. A classic symptom of cardiovascular disease is chest pain. However‚ with some forms of cardiovascular disease‚ such as atherosclerosis‚ there
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Cardiovascular disease refers to any disease that affects the cardiovascular system‚ principally cardiac disease‚ vascular diseases of the brain and kidney‚ and peripheral arterial disease. The causes of cardiovascular disease are diverse but atherosclerosis and/or hypertension are the most common. Some of the cardiovascular diseases are hypertensive heart disease‚ coronary heart disease and heart failure. What is a respiratory disease? Respiratory disease is a class of diseases that involve
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of cholesterol. In humans‚ the desired cholesterol level is 200. When one’s cholesterol goes beyond the desired cholesterol level then this would mean that the individual has the risk of getting Hypercholesterolemia. Hypercholesterolemia cause atherosclerosis wherein the arteries are hardened and narrowed‚ slowly blocking the arteries and putting blood flow at risk. This would then lead to more diseases such as coronary artery disease (CAD)‚ heart attack‚ transient ischemic attack (TIA) or stroke and
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American Heart Association conferences in San Francisco. For example‚ coffee drinkers appear to have a lower risk of hospitalization for abnormal heart rhythms. And there’s no indication that having a few cups every day increases the risk of atherosclerosis‚ the thickening of blood vessel walls that can lead to heart attacks and other problems. What’s more‚ something in coffee other than caffeine might be responsible for a reduced risk of diabetes for women who regularly imbibe java. But it
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blood flow is sudden and extreme. In angina the episodes of restricted flow are temporary and usually much less dangerous. The common underlying problem in the various forms of CHD is atherosclerosis‚ a complex process that affects the vessels supplying blood to the heart‚ the coronary arteries. In atherosclerosis‚ build-ups called plaques form on the inside surface of the artery. When advanced‚ plaques can narrow the channel through which the blood flows. Plaques can be single or multiple and can
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