Aneurysmal disease

Revision as of 22:11, 8 August 2012 by WikiBot (talk | contribs) (Bot: Automated text replacement (-{{SIB}} + & -{{EH}} + & -{{EJ}} + & -{{Editor Help}} + & -{{Editor Join}} +))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

WikiDoc Resources for Aneurysmal disease

Articles

Most recent articles on Aneurysmal disease

Most cited articles on Aneurysmal disease

Review articles on Aneurysmal disease

Articles on Aneurysmal disease in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Aneurysmal disease

Images of Aneurysmal disease

Photos of Aneurysmal disease

Podcasts & MP3s on Aneurysmal disease

Videos on Aneurysmal disease

Evidence Based Medicine

Cochrane Collaboration on Aneurysmal disease

Bandolier on Aneurysmal disease

TRIP on Aneurysmal disease

Clinical Trials

Ongoing Trials on Aneurysmal disease at Clinical Trials.gov

Trial results on Aneurysmal disease

Clinical Trials on Aneurysmal disease at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Aneurysmal disease

NICE Guidance on Aneurysmal disease

NHS PRODIGY Guidance

FDA on Aneurysmal disease

CDC on Aneurysmal disease

Books

Books on Aneurysmal disease

News

Aneurysmal disease in the news

Be alerted to news on Aneurysmal disease

News trends on Aneurysmal disease

Commentary

Blogs on Aneurysmal disease

Definitions

Definitions of Aneurysmal disease

Patient Resources / Community

Patient resources on Aneurysmal disease

Discussion groups on Aneurysmal disease

Patient Handouts on Aneurysmal disease

Directions to Hospitals Treating Aneurysmal disease

Risk calculators and risk factors for Aneurysmal disease

Healthcare Provider Resources

Symptoms of Aneurysmal disease

Causes & Risk Factors for Aneurysmal disease

Diagnostic studies for Aneurysmal disease

Treatment of Aneurysmal disease

Continuing Medical Education (CME)

CME Programs on Aneurysmal disease

International

Aneurysmal disease en Espanol

Aneurysmal disease en Francais

Business

Aneurysmal disease in the Marketplace

Patents on Aneurysmal disease

Experimental / Informatics

List of terms related to Aneurysmal disease

Cardiology Network

Discuss Aneurysmal disease further in the WikiDoc Cardiology Network
Adult Congenital
Biomarkers
Cardiac Rehabilitation
Congestive Heart Failure
CT Angiography
Echocardiography
Electrophysiology
Cardiology General
Genetics
Health Economics
Hypertension
Interventional Cardiology
MRI
Nuclear Cardiology
Peripheral Arterial Disease
Prevention
Public Policy
Pulmonary Embolism
Stable Angina
Valvular Heart Disease
Vascular Medicine

Editor-in-Chief: Amjad AlMahameed, MD, MPH, RPVI, FACP. Beth Israel Decaoness Medical Center and Harvard Medical School. Boston, USA


Aortic Aneurysm

The term aneurysm is derived from the Greek word (aneurysmos) meaning dilatation. The most common site for true arterial aneurysms is the infra-renal aorta. A true aneurysm is a circumscribed dilatation of the three layers of vessel wall with a diameter increase of at least 50% compared to that of the proximal segment (i.e., the the dilated segment is 1.5 times that of the adjacent proximal segment). Ectasia, on the other hand, is a mild dilatation (luminal diameter increased by <50%) that is due to age-related degenerative changes in the vessel wall. Pheotypically, aneurysms are further classified as fusiform (symmetric involvement of the entire aortic circumference) or saccular (focal outpouching of part of the vessel wall). While most aneurysms are silent, a variety of symptoms and life-threatening complications can occur. Timely diagnosis and treatment of aortic aneurysms is critical.

Thoracic Aortic Aneurysms

Thoracic aortic aneurysms (TAAs) encompass all aneurysms the aorta between the aortic root and the crura of the diaphragm. The aortic root and the ascending vthoracic aorta are the most common sites of TAAs (60%), followed by the descending thoracic aorta (40%). Involvement of the aortic arch and/or extension of a TAA into the abdominal aorta (AA) (so called thoracoabdominal aneurysms) are relatively uncommon subsets (each encountered in 10% of cases or less).

TAAs are relatively uncommon with an estimated incidence between 6 and 10 new aneurysms per 100,000 person-years. TAAs are usually diagnosed after the sixth decade of life and they typically expand slowly (approximately 0.1-0.2 cm/year). The risk of rupture is closely related to aneurysm size (3% for TAAs <4 cm and 7% for >6 cm). These bioepidemiological characteristics support the current stand that screening for TAA is not recommended in the general population. Certain population substrates, such as those with history of Marfan syndrome, Turner syndrome, Ehlers-Danlos type IV syndrome, familial thoracic aortic disease syndromes, and patients with bicuspid aortic valve should have imaging study to screen for TAAs.

Abdominal Aortic Aneurysm

Since the abdominal aorta tends to be about 2 cm in diameter, a true AAA measures >3.0 cm. However, studies showed that the normal diameter varies depending on the patient’s age, sex, height, weight, race, body surface area, and baseline blood pressure. Hence, using a diameter ratio (> 1.5 the proximal segment) may be more accurate, particularly in smaller people such as women and those of short stature.

Template:WikiDoc Sources