Don't delay your care at Mayo Clinic. Abdominal aortic aneurysms are fairly common and can be life-threatening if not treated immediately. When symptoms do occur, the signs of an abdominal aortic aneurysm can include: A pulsating mass or … The aorta carries blood from your heart to your abdomen, legs, and pelvis. An abdominal aortic aneurysm is an abnormal enlargement or bulging of the aorta (the main large artery that carries blood away from the heart) in the portion of the aorta located within the abdominal cavity.. An abdominal aortic aneurysm often does not cause any symptoms. The size increases very gradually as people age. Abdominal aortic aneurysms occur most often in people aged 60 and older. What are the Symptoms of an Abdominal Aortic Aneurysm? Aneurysms develop slowly over many years. They usually cause no symptoms, except during rupture. If an abdominal aortic aneurysm is not diagnosed and treated, the aneurysm could cause serious health problems. "Nurses may mistake an aneurysm for an MI, and the patient may not be transferred to a high-risk cardiovascular center," says York. An abdominal aortic aneurysm usually causes a balloon-like swelling. The major risk of an aortic aneurysm is a rupture that results in severe or fatal internal bleeding. Most aortic aneurysms are asymptomatic. When it does cause symptoms or signs, these can include. Those problems can include: Rupture : Because the aorta is the main supplier of blood to the body, a ruptured abdominal aortic aneurysm could cause life-threatening bleeding. Schedule your appointment now for safe in-person care. Abdominal aortic aneurysm (AAA or triple A) is a localized enlargement of the abdominal aorta such that the diameter is greater than 3 cm or more than 50% larger than normal. A small aneurysm does not preclude rupture:17,18 Any symptoms consistent with aortic pain in a patient with an aortic diameter greater than 3.0 cm should have this diagnosis (or alternative vascular catastrophes) ruled out. An aneurysm may be found by an X-ray, CT scan, or MRI that was done for other reasons. Occasionally, aortic abdominal aneurysms are mistaken for MIs. An abdominal aortic aneurysm is a bulging of the aorta, the main blood vessel that takes blood from the heart to organs and tissues in the lower half of the body. Symptoms of Aneurysm. What are the symptoms of an abdominal aortic aneurysm? back or flank pain,; severe or worsening abdominal pain, About 3 out of 4 abdominal aortic aneurysms don't cause symptoms. When the abdominal aortic walls are swollen, it's known as abdominal aortic aneurysm. Abdominal Aortic Aneurysm Symptoms and Diagnosis. Some aneurysms, however, may produce symptoms such as intense back or abdominal pain. Abdominal aortic aneurysms usually do not have symptoms, but a pulsating sensation in the abdomen and/or the back has been described. Large aneurysms can sometimes be felt by pushing on the abdomen. Occasionally, abdominal, back, or leg pain may occur. Most people with abdominal aortic aneurysm do not feel symptoms. It may rupture before being diagnosed. Since an AAA may not have symptoms, it's called the silent killer. An abdominal aortic aneurysm can grow slowly and silently. Normally, the aorta is about one inch (2.5 centimeters) in diameter. Aneurysms develop slowly over the course of several years, and since most people don't experience symptoms, you may be unaware that you have an abdominal aortic aneurysm. The wall of the aorta bulges out. If the abdominal aorta becomes larger than 3 centimeters, this is called an abdominal aortic aneurysm. An abdominal aortic aneurysm is an aneurysm (blood vessel rupture) in the part of the aorta that passes through the belly (abdomen). 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