aneurysm

(redirected from cerebral aneurysm)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

aneurysm

(ăn`yo͝orĭzəm), localized dilatation of a blood vessel, particularly an arteryartery,
blood vessel that conveys blood away from the heart. Except for the pulmonary artery, which carries deoxygenated blood from the heart to the lungs, arteries carry oxygenated blood from the heart to the tissues.
..... Click the link for more information.
, or the heartheart,
muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activity, lasting from before birth to the end of life. Anatomy and Function

The human heart is a pear-shaped structure about the size of a fist.
..... Click the link for more information.
. Dilatation of an artery, and therefore weakness of that portion of the arterial wall, may be rarely congenital, or it may be caused by syphilissyphilis
, contagious sexually transmitted disease caused by the spirochete Treponema pallidum (described by Fritz Schaudinn and Erich Hoffmann in 1905). Syphilis was not widely recognized until an epidemic in Europe at the end of the 15th cent.
..... Click the link for more information.
, hypertensionhypertension
or high blood pressure,
elevated blood pressure resulting from an increase in the amount of blood pumped by the heart or from increased resistance to the flow of blood through the small arterial blood vessels (arterioles).
..... Click the link for more information.
 (high blood pressure), arteriosclerosisarteriosclerosis
, general term for a condition characterized by thickening, hardening, and loss of elasticity of the walls of the blood vessels. These changes are frequently accompanied by accumulations inside the vessel walls of lipids, e.g.
..... Click the link for more information.
, bacterial and fungal infections, or penetrating injury as from a bullet or knife. An aneurysm may be asymptomatic or it may cause varying symptoms, depending upon its location and size and on whether the expanding mass is pressing on adjacent nerves or vital organs. The weakened arterial walls of an aneurysm are always in danger of sudden rupture, with resulting hemorrhage and death.

Aneurysms occur most commonly in the large arteries; the aortaaorta
, primary artery of the circulatory system in mammals, delivering oxygenated blood to all other arteries except those of the lungs. The human aorta, c.1 in. (2.54 cm) in diameter, originates at the left ventricle of the heart.
..... Click the link for more information.
, the largest vessel in the body, is the one most often affected. Ventricular aneurysms of the heart often occur after myocardial infarctionsinfarction,
blockage of blood circulation to a localized area or organ of the body resulting in tissue death. Infarctions commonly occur in the spleen, kidney, lungs, brain, and heart.
..... Click the link for more information.
. Aneurysms also occur in the arteries within the skull and in other areas of the body.

Aneurysms can be detected by echocardiogram, spin echo magnetic resonance imaging scans, coronary arteriograms, and biplane ventriculograms. Treatment, where feasible, may involve surgery to remove the aneurysm or the insertion of coiled wire to close it off. Coiled wire can only be used on aneurysms that are connected to the blood vessel by a narrowed neck. The coiling fills the aneurysm, obstructing the flow of blood into the dilatation, and blood clots form around the wire, preventing the aneurysm from bursting. Surgical excision of the dilated saclike portion of the affected artery sometimes requires the replacement of that portion by a synthetic graft, a section of vessel (made of polymer fiber) that is similar in size.

aneurysm

[′an·yə‚riz·əm]
(medicine)
Localized abnormal dilation of an artery due to weakening of the vessel wall.

aneurysm

, aneurism
a sac formed by abnormal dilation of the weakened wall of a blood vessel
References in periodicals archive ?
Aneurysm rupture in multiple cerebral aneurysm disease manifesting as SDH with SAH is rare(4,15), as is the combined endovascular and surgical treatment for the condition(16).
Hemodynamic mechanisms underlying cerebral aneurysm pathogenesis.
Pathophysiology of development and rupture of cerebral aneurysms.
Washington, May 05 (ANI): A research has revealed that women who develop cerebral aneurysms are less likely to have taken the oral contraceptive pill or hormone replacement therapy, suggesting taking oestrogen could have a protective effect.
Women with cerebral aneurysms were less likely to have used oral contraceptives or hormone replacement therapy in their lifetimes than controls, according to the results of a retrospective case-control study of 60 women with aneurysms.
1995) while amongst the Taiwanese, cerebral aneurysms are located in the distributions of the MCA in about a fifth (19.
I always get them mixed up as well: boyfriends, cerebral aneurysms.
These measures might be especially advisable for people who are at higher risk of a cerebral aneurysm, including those who: have a family history of cerebral aneurysm, are moderate to heavy drinkers, use blood thinners such as warfarin (Coumadin) or certain stimulant medications such as amphetamines or suffer from conditions such as high blood pressure, hardening of the arteries or high LDL cholesterol," says Dr.
Hideo Fujimoto in the graduate school of Nagoya Institute of Technology, has developed a force sensing system to be used in cerebral aneurysm treatment.
Non-traumatic subarachnoid hemorrhage (SAH) secondary to rupture of a cerebral aneurysm is an event associated with high mortality and morbidity.
Alexander underwent emergency brain surgery after suffering a double cerebral aneurysm in November but is now close to a return.
The 45-year-old collapsed at his home last month and had been recovering at Sheffield's Royal Hallamshire Hospital from a complex operation to repair a ruptured cerebral aneurysm - the swelling of a blood vessel.