An aneurysm or aneurism  is a localized, blood-filled balloon-like bulge in the wall of a blood vessel. It is a balloon-like bulge in an artery.
More detail and supporting information is in the main article. 1  An aneurysm occurs when part of a blood vessel or cardiac chamber swells. 2  An aneurysm can occur in any part of the body, though they often occur on the wall of the aorta. 3  The two main types of aneurysms are aortic aneurysms and cerebral aneurysms. An aneurysm occurs when part of a blood vessel (artery) or cardiac chamber swells, - either the blood vessel is damaged, or there is a weakness in the wall of the blood vessel. As blood pressure builds up it balloons out at its weakest point. 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.  1 An aneurysm occurs when part of a blood vessel or cardiac chamber swells. 2  An aneurysm can occur in any part of the body, though they often occur on the wall of the aorta. 3  The two main types of aneurysms are aortic aneurysms and cerebral aneurysms. 4  Aneurysms are most common in men and people over 65 years of age. An aneurysm occurs when part of a blood vessel (artery) or cardiac chamber swells, - either the blood vessel is damaged, or there is a weakness in the wall of the blood vessel. As blood pressure builds up it balloons out at its weakest point. If an aneurysm expands quickly or ruptures, symptoms may develop suddenly and include: An aneurysm occurs when part of an artery wall weakens, allowing it to widen abnormally or balloon out. The causes of aneurysms are sometimes unknown. Some may be congenital, meaning a person is born with them. An aneurysm may also occur as the result of aortic disease or an injury. A family history of aneurysm may increase your risks of developing an aneurysm.  An aneurysm (AN-u-rism) is a balloon-like bulge in an artery. Arteries are blood vessels that carry oxygen-rich blood to your body. Arteries have thick walls to withstand normal blood pressure. However, certain medical problems, genetic conditions, and trauma can damage or injure artery walls. An aneurysm can grow large and rupture (burst) or dissect. A rupture causes dangerous bleeding inside the body. A dissection is a split in one or more layers of the artery wall. The split causes bleeding into and along the layers of the artery wall. Both rupture and dissection often are fatal. Overview. An aneurysm is a weak spot in the wall of a blood vessel that may cause an abnormal bulge. The bulge can rupture and cause internal bleeding. Although it can occur in any blood vessel, aneurysms are most common in the brain, the aorta, the legs, and spleen. Aneurysms 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. As an aneurysm increases in size, the risk of rupture increases. A ruptured aneurysm can lead to bleeding and subsequent hypovolemic shock, leading to death. Aneurysms are a result of a weakened blood vessel wall, and can be a result of a hereditary condition or an acquired disease. 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. 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 in the area surrounding the blood vessel. The disease can occur in the aorta, in a blood vessel in the brain, or in a peripheral blood vessel.  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. Symptoms of a ruptured brain aneurysm often come on suddenly. If you have any of the following symptoms or notice them in someone you know, call 911 or other emergency services right away 1  : A sudden, severe headache that is different from past headaches. 2  Neck pain. 3  Nausea and vomiting.
http://www.medicalnewstoday.com/articles/156993.php http://www.webmd.com/heart-disease/tc/aortic-aneurysm-overview http://www.medicalnewstoday.com/articles/156993.php http://www.heart.org/HEARTORG/Conditions/More/What-is-an-Aneurysm_UCM_454435_Article.jsp http://www.nhlbi.nih.gov/health/health-topics/topics/arm/ http://www.healthline.com/health/aneurysm https://en.wikipedia.org/wiki/Aneurysm http://www.healthgrades.com/conditions/aneurysm http://www.webmd.com/brain/tc/brain-aneurysm-topic-overview
what is aneurysm