definition of aneurysm
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- An aneurysm or aneurism (from Greek: ἀνεύρυσμα, aneurysma, dilation, from ἀνευρύνειν, aneurynein, to dilate) is a localized, blood-filled balloon-like bulge in the wall of a blood vessel.neurysms can occur in any blood vessel, with examples including aneurysms of the circle of Willis in the brain, aortic aneurysms affecting the thoracic aorta, and abdominal aortic aneurysms. Aneurysms can also occur within the heart itself.
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- In this article. An aneurysm is an abnormal bulge in the wall of an artery. Normally, the walls of arteries are thick and muscular, allowing them to withstand a large amount of pressure.Occasionally, however, a weak area develops in the wall of an artery.his allows the pressure within the artery to push outwards, creating a bulge or ballooned area called an aneurysm.. Aneurysms can form in any blood vessel, but they occur most commonly in the aorta (aortic aneurysm). The aorta is the largest artery in the body. It carries blood from the heart to the rest of the body.
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Aortic Aneurysm - Topic Overview An aortic aneurysm (say a-OR-tik AN-yuh-rih-zum) is a bulge in a section of the aorta, the body's main artery. The aorta carries oxygen-rich blood from the heart to the rest of the body. Because the section with the aneurysm is overstretched and weak, it can burst.If the aorta bursts, it can cause serious bleeding that can quickly lead to death.lood flow often slows in the bulging section of an aortic aneurysm, causing clots to form. If a blood clot breaks off from an aortic aneurysm in the chest area, it can travel to the brain and cause a stroke. Blood clots that break off from an aortic aneurysm in the belly area can block blood flow to the belly or legs.
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arteriovenous malformations Definition. Arteriovenous malformations are blood vessel defects that occur before birth when the fetus is growing in the uterus (prenatal development). The blood vessels appear as a tangled mass of arteries and veins.n AVM hemorrhage is not as dangerous as an aneurysmal rupture. (An aneurysm is a swollen, blood filled vessel where the pressure of the blood causes the wall to bulge outward.) There is an approximate 10% fatality rate associated with AVM hemorrhage, compared to a 50% fatality rate for ruptured aneurysms.
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Thoracic Aortic Aneurysm By definition, an aneurysm is a localized or diffuse dilation of an artery with a diameter at least 50% greater than the normal size of the artery. Most aortic aneurysms (AAs) occur in the abdominal aorta; these are termed abdominal aortic aneurysms (AAAs).he average size for an infrarenal aorta is 2 cm; therefore, AAAs are usually defined by diameters greater than 3 cm. The normal size for the thoracic and thoracoabdominal aorta is larger than that of the infrarenal aorta, and aneurysmal degeneration in these areas is defined accordingly.
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- A brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke. brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke.
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- A brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke.he following risk factors may increase your risk for an aneurysm or, if you already have an aneurysm, may increase your risk of it rupturing: 1  Family history. 2  People who have a family history of brain aneurysms are more likely to have an aneurysm than those who don't.
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Cerebral Aneurysms An aneurysm is a small bubble that forms on the wall of an artery, a blood vessel that carries blood to the brain. The aneurysm has a thin wall, compared to the thicker wall of a normal brain artery.
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Aneurysm An aneurysm is a bulging, weakened area in the wall of a blood vessel resulting in an abnormal widening or ballooning greater than 50% of the vessel's normal diameter (width). An aneurysm may occur in any blood vessel, but is most often seen in an artery rather than a vein.
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- An aneurysm is an arterial condition in which the wall of an artery weakens, creating a bulge, or distension of the artery.4,5. A comparison between an artery with an aneurysm and two different types of artery.
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Peripheral Aneurysm Peripheral Aneurysm. A weakening in the wall of a blood vessel in your abdomen or sometimes in a leg which results in an abnormally dilated area.
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- The word aneurysm comes from the Latin word aneurysma, which means dilatation. Aneurysm is an abnormal local dilatation in the wall of a blood vessel, usually an artery, due to a defect, disease, or injury. Aneurysms can be true or false. A false aneurysm is a cavity lined by blood clot.The 3 major types of true intracranial aneurysms are saccular, fusiform, and dissecting.hown here is a CT scan of an aneurysmal subarachnoid hemorrhage. The CT scan in a 55-year-old woman shows subarachnoid blood within the interpeduncular and ambient cisterns and the right sylvian fissure caused by a ruptured aneurysm at the junction of the right carotid artery and the posterior communicating artery.
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(A-Z) All Dissecting aneurysm-A condition in which the layers of an artery separate or are torn, causing blood to flow between the layers. Dissecting aneurysms usually happen in the aorta, the large vessel that carries blood from the heart to other parts of the body and can cause sudden death.
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How does an aneurysm cause a stroke? A Honor Society of Nursing (STTI) answered. An aneurysm is a swelling in an artery of the brain. In some cases, people are born with an aneurysm, or it may develop over time. When an aneurysm bursts, it results in bleeding in the brain that causes a hemorrhagic stroke.
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FAQs about Thoracic Aortic Disease An aneurysm is a dilatation - or a bulging ballooning out - of the walls of an artery. An aortic aneurysm is bulging out of the walls of the aorta, which is the largest artery in the body and carries oxygen-rich blood from the heart to the rest of the body.
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aneurysm A weak point in a blood vessel where the pressure of the blood causes the vessel wall to bulge outwards. An aneurysm may also appear as a sac-like projection from the blood vessel wall.
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Aortic Aneurysm - Topic Overview An aortic aneurysm (say a-OR-tik AN-yuh-rih-zum) is a bulge in a section of the aorta, the body's main artery. The aorta carries oxygen-rich blood from the heart to the rest of the body. Because the section with the aneurysm is overstretched and weak, it can burst. If the aorta bursts, it can cause serious bleeding that can quickly lead to death.
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Background The word aneurysm comes from the Greek word aneurysma (dilatation). An aneurysm is an abnormal local dilatation in the wall of a blood vessel, usually an artery, that develops as a consequence of a defect, disease, or injury.
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Brain aneurysm repair Definition. Brain aneurysm repair is surgery to correct an aneurysm. This is a weak area in a blood vessel wall that causes the vessel to bulge or balloon out and sometimes burst (rupture).It may cause:rain aneurysm repair is surgery to correct an aneurysm. This is a weak area in a blood vessel wall that causes the vessel to bulge or balloon out and sometimes burst (rupture). It may cause:
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Aneurysms and Dissections Aneurysms and Dissections. An aneurysm is a balloon-like bulge in an artery. Aneurysms can form in arteries of all sizes. An aneurysm occurs when the pressure of blood passing through part of a weakened artery forces the vessel to bulge outward, forming what you might think of as a blister. Not all aneurysms are life-threatening.
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- An aneurysm is an abnormal widening or ballooning of an artery due to weakness in the wall of the blood vessel. Aneurysms are dangerous because they may burst, spilling blood into the area surrounding the blood vessel.
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- An aortic aneurysm is an abnormal bulge that occurs in the wall of the major blood vessel (aorta) that carries blood from your heart to your body. Aortic aneurysms can occur anywhere in your aorta and may be tube-shaped (fusiform) or round (saccular).
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Aneurysm An aneurysm is an abnormal widening or ballooning of a part of an artery due to weakness in the wall of the blood vessel. It is not clear exactly what causes aneurysms. Some aneurysms are present at birth (congenital). Defects in some parts of the artery wall may be a cause. Common locations for aneurysms include:
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Aortic Aneurysm - Topic Overview An aortic aneurysm (say a-OR-tik AN-yuh-rih-zum) is a bulge in a section of the aorta, the body's main artery. The aorta carries oxygen-rich blood from the heart to the rest of the body. Because the section with the aneurysm is overstretched and weak, it can burst.lood flow often slows in the bulging section of an aortic aneurysm, causing clots to form. If a blood clot breaks off from an aortic aneurysm in the chest area, it can travel to the brain and cause a stroke. Blood clots that break off from an aortic aneurysm in the belly area can block blood flow to the belly or legs.
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- What is a brain aneurysm? A brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke. When a brain aneurysm ruptures, the result is called a subarachnoid hemorrhage. Depending on the severity of the hemorrhage, brain damage or death may result. The most common location for brain aneurysms is in the network of blood vessels at the base of the brain called the circle of Willis. What causes a brain aneurysm? A person may inherit the tendency to form aneurysms, or aneurysms may develop because of hardening of the arteries (atherosclerosis) and aging.
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What is an Aneurysm? Weak, Bulging Artery Wall An aneurysm is an abnormal bulging out or ballooning of a portion of the artery, usually due to weakness of the arterial wall. The aneurysm may enlarge and rupture, often with disastrous consequences.