Have a symptom?
See what questions
a doctor would ask.


Aneurysm: Introduction

An aneurysm is a potentially life-threatening condition in which there is an abnormal swelling and ballooning of an artery, which can rupture and result in internal bleeding. Aneurysm is a general term that encompasses a variety of types, including aortic aneurysm and brain aneurysm. Aneurysms can occur in any artery in the body, but the most common site is in the aorta (aortic aneurysm), followed by the arteries of the brain (brain aneurysm).

An aneurysm develops when there is damage or a weakening of the wall of an artery. This weakened area can balloon out, disrupt normal blood flow, and rupture due to the force of blood flowing through the artery.

This process leads to symptoms and complications that vary depending on the specific type of aneurysm. They can include chest pain, back pain, shortness of breath, abdominal pain, change in consciousness, and headache. Many people have no symptoms, especially when aneurysm is small or in an early stage and has not ruptured. For more information on symptoms, refer to symptoms of aneurysm.

When certain aneurysms rupture, they cause internal arterial hemorrhage and serious, potentially life-threatening complications, such as hypotension, shock, stroke, coma and death.

Aneurysms have a variety of causes. These include a defect in the artery wall that makes the artery wall thinner and weaker than normal. Defects in artery walls can run in families and may have a genetic component. They often form in the arteries of the brain.

Another cause of an aneurysm is inflammation of the artery, which also causes weakening of the artery wall. Inflammation can be the result of such conditions as endocarditis, syphilis, or arteritis.

Damage to artery walls can also cause aneurysms. Damage can be the result of such conditions as atherosclerosis and hypertension.

When a person has symptoms of an aneurysm, making a diagnosis begins with taking a thorough personal and family medical history, including symptoms, and completing a physical examination. Diagnosis also includes performing imaging tests, such as X-rays, ultrasound, or CT scan.

Because people with aneurysms frequently have no symptoms, they are often found incidentally on imaging tests that are performed for other conditions, such as a chest X-ray taken for pneumonia.

A diagnosis can also be delayed because of a lack of symptoms. A misdiagnosis is possible, because when the symptoms do occur, they can mimic the symptoms of other conditions, such as a myocardial infarction. For information on misdiagnosis, refer to misdiagnosis of aneurysm.

Treatment of an aneurysm varies depending on the size, location, and type of aneurysm. The prognosis is good for people who have prompt treatment of an aneurysm. If an aneurysm is not treated until after it ruptures, serious life-threatening complications, such as hypovolemic shock, stroke, coma, and death are far more likely to occur. The fatality rate of ruptured brain aneurysm, or ruptured aortic aneurysm is about 50 percent.

For some types of aneurysms that are not large or do not threaten health, a "watch and wait" approach might be taken. Brain aneurysms or aortic aneurysms that are at risk for rupturing are generally treated with surgery. For more information on treatment, refer to treatment of aneurysm. ...more »

Aneurysm: Dangerous ballooning of a weakened area of an artery. More detailed information about the symptoms, causes, and treatments of Aneurysm is available below.

Aneurysm: Symptoms

The symptoms of an aneurysm can mimic other conditions, such as myocardial infarction or migraine headache. People with an aneurysm often have no symptoms, and when they do, symptoms can run the gamut from mild to severe. They also vary between individuals and the specific types of aneurysm, such as aortic aneurysm and brain aneurysm.

Symptoms of ...more symptoms »

Aneurysm: Treatments

Because some types of aneurysms can be life-threatening, prompt diagnosis and treatment of the condition is key to maintaining health and preserving life. The fatality rate of ruptured brain aneurysm, or ruptured aortic aneurysm is about 50 percent.

Ideally, aneurysms should be treated before they rupture and cause serious life-threatening complications, such as ...more treatments »

Aneurysm: Misdiagnosis

A diagnosis of aneurysm may missed because its symptoms may be mistaken for symptoms of such conditions as myocardial infarction or migraine headache. For people with a prior diagnosis of migraine headache, it can be easy to assume that a severe headache is simply a migraine. This can result in a delay in seeking medical care and a diagnosis of a ...more misdiagnosis »

Symptoms of Aneurysm

Treatments for Aneurysm

Home Diagnostic Testing

Home medical testing related to Aneurysm:

Wrongly Diagnosed with Aneurysm?

Aneurysm: Related Patient Stories

Aneurysm: Deaths

Read more about Deaths and Aneurysm.

Types of Aneurysm

Diagnostic Tests for Aneurysm

Test for Aneurysm in your own home

Click for Tests

Aneurysm: Complications

Review possible medical complications related to Aneurysm:

Causes of Aneurysm

More information about causes of Aneurysm:

Disease Topics Related To Aneurysm

Research the causes of these diseases that are similar to, or related to, Aneurysm:

Aneurysm: Undiagnosed Conditions

Commonly undiagnosed diseases in related medical categories:

Misdiagnosis and Aneurysm

Heart attacks can be undiagnosed: Although the most severe symptoms of heart attack are hard to miss, there are varying degrees of severity. It is altogether too common for people to die from undiagnosed heart attack, or more »

Heart attacks can be overdiagnosed: Although many people die from heart attacks, there are also many cases where people fear that they have a heart attack, but actually have something milder. Some of the more »

Rare heart condition often undiagnosed: The rare heart condition called long QT syndrome can lead to episodes of palpitations and rapid heartbeat. In rare cases, this more »

Heart attack can be over-diagnosed: Although heart attack is often undiagnosed, leading to fatality, it can also be over-diagnosed. People become concerned that a condition is a heart attack, whereas there more »

Blood pressure cuffs misdiagnose hypertension in children: One known misdiagnosis issue with hyperension, arises in relation to the simple equipment used to test blood pressure. The "cuff" around the arm to more »

Hypertension misdiagnosis common in children: Hypertension is often misdiagnosed in adults (see misdiagnosis of hypertension), but its misdiagnosis is even more »

Aneurysm: Research Doctors & Specialists

Research related physicians and medical specialists:

Other doctor, physician and specialist research services:

Hospitals & Clinics: Aneurysm

Research quality ratings and patient safety measures for medical facilities in specialties related to Aneurysm:

Choosing the Best Hospital: More general information, not necessarily in relation to Aneurysm, on hospital performance and surgical care quality:

Aneurysm: Rare Types

Rare types of diseases and disorders in related medical categories:

Aneurysm: Animations

Research about Aneurysm

Visit our research pages for current research about Aneurysm treatments.

Clinical Trials for Aneurysm

The US based website lists information on both federally and privately supported clinical trials using human volunteers.

Some of the clinical trials listed on for Aneurysm include:

Statistics for Aneurysm

Aneurysm: Broader Related Topics

Aneurysm Message Boards

Related forums and medical stories:

User Interactive Forums

Read about other experiences, ask a question about Aneurysm, or answer someone else's question, on our message boards:

Definitions of Aneurysm:

Protruding sac in the wall of a vein, artery, or heart, frequently caused by microbial infection; may present as pain, pressure on nearby organs, or cardiac weakening. - (Source - Diseases Database)

A cardiovascular disease characterized by a sac-like widening of an artery resulting from weakening of the artery wall - (Source - WordNet 2.1)


By using this site you agree to our Terms of Use. Information provided on this site is for informational purposes only; it is not intended as a substitute for advice from your own medical team. The information on this site is not to be used for diagnosing or treating any health concerns you may have - please contact your physician or health care professional for all your medical needs. Please see our Terms of Use.

Home | Symptoms | Diseases | Diagnosis | Videos | Tools | Forum | About Us | Terms of Use | Privacy Policy | Site Map | Advertise