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Topic: Coronary arteries

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	Coronary circulation -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		The coronary circulation consists of the (A vessel in which blood circulates) blood vessels that supply (The fluid (red in vertebrates) that is pumped by the heart) blood to, and remove blood from, the (The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body) heart.
		These arteries, when healthy, are capable of autoregulation to maintain coronary blood flow at levels appropriate to the needs of the (The muscle tissue of the heart; adapted to continued rhythmic contraction) heart muscle.
		The artery that supplies the posterior descending artery and the posterolateral artery (PLA) determines the coronary dominance.
	www.absoluteastronomy.com /encyclopedia/c/co/coronary_circulation.htm (1098 words)

	Coronary circulation - Wikipedia, the free encyclopedia
		The coronary arteries that run on the surface of the heart are called epicardial coronary arteries.
		These arteries, when healthy, are capable of autoregulation to maintain coronary blood flow at levels appropriate to the needs of the heart muscle.
		During contraction of the ventricular myocardium (systole), the subendocardial coronary vessels (the vessels that enter the myocardium) are compressed due to the high intraventricular pressures.
	en.wikipedia.org /wiki/Coronary_circulation (928 words)

	Coronary Arteries
		The epicardial coronary artery system consists of the left and right coronary arteries, which normally arise from ostia located in the left and right sinuses of Valsalva, respectively (see figures 104c, 104d, 104e, 104f, 104h).
		Portions of the epicardial coronary arteries may dip into the myocardium ("mural artery " or "tunneled artery") and be covered for a variable length (1 to several mm) by ventricular muscle ("myocardial bridge").
		A large coronary arteriovenous fistula can be seen originating in the left coronary artery, coursing over the lateral and posterior walls of the left ventricle, and eventually emptying into the right atrium.
	www.rjmatthewsmd.com /Definitions/coronary_arteries.htm (580 words)

	Symptoms of Coronary Artery Disease, Diseased Coronary Arteries - BWH (Site not responding. Last check: 2007-10-21)
		Your heart contains coronary arteries, tubelike branches, which are attached to your aorta (the large blood vessel that carries blood and oxygen from your heart to the rest of your body).
		Coronary arteries can become diseased when cholesterol, a fatlike substance carried in the blood, builds up to form plaque (fatty substances and calcium) in the lining of the artery.
		Coronary artery bypass graft surgery creates new pathways around the areas of your blocked arteries, allowing blood flow to be restored.
	www.brighamandwomens.org /patient/cardiac_coronary.asp (3212 words)

	Heart Anatomy
		The coronary arteries are the network of blood vessels that carry oxygen- and nutrient-rich blood to the cardiac muscle tissue.
		The left anterior descending coronary artery is embedded in the surface of the front side of the heart.
		The left circumflex coronary artery circles around the left side of the heart and is embedded in the surface of the back of the heart.
	www.cardioconsult.com /Anatomy (1174 words)

	Coronary artery disease
		The cause of coronary artery disease is atherosclerosis — the gradual buildup of plaques in blood vessels that feed your heart (your coronary arteries).
		Arteries are blood vessels that carry oxygen-rich blood away from your heart, to all of the tissues of your body — including your heart itself.
		Artery disease is thought to begin with an injury to the lining of the walls of arteries.
	www.cnn.com /HEALTH/library/DS/00064.html (3639 words)

	Bypass surgery: New pathways for blocked arteries - MayoClinic.com
		Multiple coronary arteries are diseased and the heart's main pump — the left ventricle — is functioning poorly.
		Internal mammary arteries supply the chest wall and are close enough to the heart that they can remain attached to their blood source, with their downstream ends grafted onto the portions of the coronary arteries needing help.
		Another risk of coronary bypass surgery is that plaques — the fatty deposits that accumulate on the inner walls of coronary arteries and other vessels in atherosclerosis — may break loose from the walls of the aorta when it's clamped shut for the heart-lung machine.
	www.mayoclinic.com /invoke.cfm?id=HB00022 (1346 words)

	Function of the Coronary Arteries : MCG Health System
		The coronary arteries consist of two main arteries: the right and left coronary arteries, and their two branches, the circumflex artery and the left anterior descending artery.
		The right coronary artery (RCA), which divides into the right posterior descending artery and a large marginal branch, supplies blood to the heart ventricles, right atrium, and sinoatrial node (cluster of cells in the right atrial wall that regulates the heart's rhythmic rate).
		Since coronary arteries deliver blood to the heart muscle, any coronary artery disorder or disease can have serious implications by reducing the flow of oxygen and nutrients to the heart, which may lead to a heart attack and possibly death.
	www.mcghealth.org /Greystone/heart/arteries.html (354 words)

	Coronary Arteries (Site not responding. Last check: 2007-10-21)
		The heart also includes a system of arteries that branch off of the main coronary arteries that assist in supplying the heart with the needed oxygen and nutrients.
		The left coronary artery branches into the circumflex artery and the left anterior descending artery.
		When coronary arteries narrow to the point that blood flow to the heart is limited, collateral vessels become enlarged and active.
	www.communitymemorial.com /heart/coronaryarteries.htm (199 words)

	Medinfo: Coronary angiography
		Coronary angiography is an X-Ray procedure to show up the arteries that supply blood to the heart muscle (the coronary arteries).
		Coronary angiograms are usually undertaken in a hospital which has a cardiac surgery unit, in case any surgery becomes necessary during or shortly after the test.
		There is a small chance that you could develop a blocked coronary artery as a result of angiography, and thus sustain a heart attack (myocardial infarction), which is, of course exactly what we are trying to avoid.
	www.medinfo.co.uk /tests/corangio.html (689 words)

	Coronary thrombosis (heart attack)
		An alternative is emergency dilatation (enlarging) of the occluded coronary artery using a balloon, a procedure known as coronary angioplasty.
		This reduces the workload on the heart and increases flow of blood in the coronary arteries.
		Nicorandil (Ikorel) reduces the muscular tension in the coronary arteries and dilates (enlarges) the vessels accordingly.
	www.netdoctor.co.uk /diseases/facts/coronarythrombosis.htm (1843 words)

	Coronary angioplasty and stenting: Opening clogged arteries to reduce chest pain and other symptoms - MayoClinic.com
		Coronary angioplasty is a medical procedure used to open arteries that have narrowed to the point that they impede blood flow to the heart.
		Once the artery is widened, a device called a stent is usually placed in the artery to act as scaffolding to help prevent it from renarrowing after the angioplasty.
		In that procedure, an artery or a vein is removed from a different part of your body and sewn to the surface of your heart to take over for the blocked coronary artery.
	www.mayoclinic.com /invoke.cfm?id=HQ00485 (1654 words)

	Mayo Clinic - Contrast enhanced CT lets doctors look at abnormal coronary arteries
		The left and right coronary arteries and their smaller branches are those arteries that supply the heart muscle itself with blood.
		However, if a coronary artery courses between the aorta and the pulmonary artery, the body’s two major blood vessels, the person may die suddenly, often during exercise when the heart’s blood and oxygen needs are greater.
		There are numerous variations in the origin and course of the coronary arteries, but regardless of the abnormality, blood is supplied to the entire heart muscle.
	www.mayoclinic.org /news2002-jax/1396.html (789 words)

	Coronary Artery Disease (Site not responding. Last check: 2007-10-21)
		Coronary artery disease is a type of heart disease.
		However, none of these procedures results in a cure for coronary artery disease and there is a chance that the blockage could return.
		Coronary artery bypass surgery (or bypass surgery) is an operation to bring blood to the heart.
	www.4woman.gov /faq/coronary.htm (1399 words)

	MedlinePlus Medical Encyclopedia: Coronary heart disease
		Coronary heart disease (or coronary artery disease) is a narrowing of the small blood vessels that supply blood and oxygen to the heart (coronary arteries).
		Coronary disease usually results from the build up of fatty material and plaque (atherosclerosis).
		Coronary heart disease (CHD) is the leading cause of death in the United States for men and women.
	www.nlm.nih.gov /medlineplus/ency/article/007115.htm (1187 words)

	Coronary arteries definition - Medical Dictionary definitions of popular medical terms
		They are called the coronary arteries because they encircle the heart in the manner of a crown.
		Those most often bypassed today include the right coronary artery, the posterior descending coronary artery, the left main coronary artery, the left anterior descending coronary artery and the left circumflex coronary artery.
		Plaques obstructing the coronary arteries may also be treated by balloon angioplasty, stents, and other techniques.
	www.medterms.com /script/main/art.asp?articlekey=7250 (301 words)

	Heartpoint: Coronary Arteries Information (Site not responding. Last check: 2007-10-21)
		These are the coronary arteries, the first vessels to come off of the aorta.
		Typically, there is one artery on the right side and one on the left, with the left one generally being the larger.
		The Left Main coronary artery divides into two sizable branches, the Left Anterior Descending (supplying the front of the heart) and the Left Circumflex (wrapping around the left side and back of the heart).
	www.heartpoint.com /coronarteries.html (322 words)

	Coronary arteries (Site not responding. Last check: 2007-10-21)
		Coronary arteries are vessels that provide oxygen-rich blood and other nutrients to the heart muscle.
		The two main coronary blood vessels, which branch from the body's main artery (aorta), are the right coronary artery (RCA) and the left coronary artery (LCA).
		The coronary arteries attach to and wrap around the heart's surface.
	www.meritcare.com /hwdb/_followLink.asp?sgml_id=ue5252-sec (185 words)

	Coronary arteries and heart function, Eastern Carolina
		Left anterior descending artery, which supplies blood to the front (anterior wall) and part of the side (anterolateral wall) of the left ventricle, to the top of the left ventricle, and to most of the wall between the ventricles (interventricular septum).
		Left circumflex artery that passes behind the heart between the left atrium and left ventricle and supplies blood to the side (lateral wall) of the left ventricle.
		When a coronary artery becomes obstructed, however, collateral coronary arteries help increase the flow of blood to the area of the heart that is being deprived of blood flow.
	www.uhseast.com /119481.cfm (607 words)

	Coronary Arteries (Site not responding. Last check: 2007-10-21)
		The left anterior descending coronary artery, extending from the aortic root to the apex, is visible.
		The heart muscle is dependent upon adequate coronary blood flow to supply nutrients to the myocardium.
		The normal coronary artery provides an unobstructed lumen for the flow of this adequate supply of blood to the myocardium.
	www.accd.edu /SAC/NURSING/RNSG2331/corart.html (296 words)

	Coronary Circulation, The Arteries Feeding The Heart Muscle With Oxygen
		Coronary circulation arteries are the blood vessels that supply oxygen to our heart giving it strength to pump keeping us alive.
		Coronary arteries are the vessels that supply blood high in oxygen to the heart.
		These arteries, when healthy, are capable of auto regulation to maintain coronary blood flow at levels appropriate to the needs of the heart muscle myocardium.
	www.heart-health-diets-and-exercises.com /Coronary-circulation.html (1077 words)

	Heart Conditions and Surgery - Coronary Arteries Bypass Surgery (Site not responding. Last check: 2007-10-21)
		Coronary bypass surgery involves placing artery and/or vein grafts around these blockages to improve the blood supply to your heart muscle.
		Coronary artery bypass surgery is an operation to improve the flow of blood...
		Coronary artery bypass surgery is a major surgical procedure performed under...
	www.bartshearts.co.uk /coronary_arteries_bypass_surgery.html (158 words)

	Bypass Surgery, Coronary Artery
		An artery may be detached from the chest wall and the open end attached to the coronary artery below the blocked area.
		The other end of the vein is attached or "grafted" to the coronary artery below the blocked area.
		In some patients, alternative treatment of coronary artery disease includes medical therapy with specific medication or non-surgical treatment such as balloon angioplasty, laser angioplasty, stents or atherectomy (plaque removal).
	www.americanheart.org /presenter.jhtml?identifier=4484 (747 words)

	CORONARY ARTERIES
		This oxygen is brought to the heart by the coronary arteries.
		The right and left coronary arteries branch off the aorta—the large main blood vessel which leaves the heart with fresh oxygen-rich blood—so they are ensured of a good blood supply rich in oxygen.
		If the coronary arteries become narrowed by deposits of cholesterol in the lining of the arteries (atherosclerosis) then the flow of blood to the heart muscle may be restricted.
	www.mydr.com.au /?article=3722 (361 words)

	6.1.3 Displaying coronary arteries (Site not responding. Last check: 2007-10-21)
		As figure 6.2 demonstrates, an image showing the coronary arteries alone is very confusing.
		The arteries wrap around the surface of the heart, but without showing the heart as well, the picture fails to convey that information.
		Without additional context, it is difficult to tell how the individual arteries relate to one another and to the rest of the heart.
	sig.biostr.washington.edu /~hinshaw/thesis/node73.html (277 words)

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