An aortic aneurysm is a serious condition where the wall of the aorta, the body’s main artery, becomes weakened and begins to bulge like a balloon. This weakening can occur anywhere along the aorta, from the chest down into the abdomen. While many people live for years without knowing they have an aneurysm, understanding what happens if one is detected and what steps to take next can make all the difference in preventing life-threatening complications.

Understanding the Prognosis

When a person is diagnosed with an aortic aneurysm, one of the first questions that arises is: what does this mean for my future? The answer depends on several factors, including the size of the aneurysm, its location, and how quickly it is growing. An aortic aneurysm diagnosis is serious, but with proper monitoring and care, many people can live normally while managing the condition.^[1]

The most significant risk associated with an aortic aneurysm is rupture, which occurs when the aneurysm bursts and causes severe internal bleeding. This is a life-threatening emergency. Statistics show that aortic aneurysms or aortic dissections were responsible for 9,904 deaths in the United States in 2019, with about 59% of those deaths occurring among men.^[3] If an abdominal aortic aneurysm ruptures, up to 81% of people may die, with 32% dying before reaching a hospital.^[5] Death occurs in approximately 55 to 64% of people experiencing a ruptured abdominal aortic aneurysm.^[5]

However, these sobering numbers apply primarily to ruptured aneurysms. When an aneurysm is discovered before it ruptures, the outlook is much more hopeful. With close follow-up care, good blood pressure control, and a healthy lifestyle, many patients living with aortic aneurysms can do well and may not need an intervention at all.^[19] The key is early detection and consistent monitoring, which allows doctors to track the aneurysm’s growth and intervene before a rupture occurs.

An aneurysm is defined as an enlargement of the aorta to greater than 1.5 times its normal size.^[5] As aneurysms increase in size, they tend to expand more quickly and become more likely to rupture.^[21] This is why regular imaging tests are essential. Once an aortic aneurysm develops, it is at risk of growing bigger, and the goal of medical care is to slow that growth and prevent complications.^[19]

How the Disease Progresses Without Treatment

Understanding what happens to an aortic aneurysm if it is left untreated helps explain why monitoring and intervention are so important. The natural course of an aortic aneurysm is gradual expansion. Over time, the weakened area of the aortic wall continues to bulge outward, much like an overinflated balloon. The aorta has thick walls designed to withstand the constant pressure of blood being pumped from the heart, but certain conditions and behaviors can damage or weaken these walls.^[2]

The force of blood pumping through the artery causes a balloon-like bulge in the weak area of the aorta.^[4] As the aneurysm grows, the wall becomes thinner and weaker. The larger the aneurysm becomes, the greater the risk that it will rupture. Aortic aneurysms typically grow very slowly over many years.^[22] However, if an aneurysm is rapidly growing, doctors may consider a procedure to repair it before it reaches a dangerous size.^[22]

Without treatment or monitoring, an untreated aortic aneurysm may eventually reach a critical size. For abdominal aortic aneurysms, doctors often consider surgery when the aneurysm reaches 5.5 centimeters or larger, or if it is growing quickly or causing pain.^[7] The decision to intervene is based on balancing the risk of rupture against the risks associated with surgery. If the aneurysm is left untreated and continues to grow, rupture becomes increasingly likely, leading to massive internal bleeding and often death.

In addition to the risk of rupture, an untreated aneurysm can lead to other serious problems. Blood clots or debris can form within the aneurysm. These pieces can break away and be carried to other areas of the body, blocking circulation. This can cause severe pain or even limb loss if blood flow is cut off for too long.^[6] The formation of clots inside the aneurysm adds another layer of danger beyond the risk of rupture.

Possible Complications

An aortic aneurysm can lead to several serious and unexpected complications, some of which can be life-threatening. The most feared complication is rupture, but there are other ways an aneurysm can cause harm. Understanding these potential complications can help patients recognize warning signs and seek help promptly.

One major complication is aortic dissection, which is a tear in the inner layer of the aortic wall. This allows blood to leak in between the layers of the artery wall, causing them to separate. A dissection can lead to a rupture of the aorta or result in not enough blood flow reaching vital organs.^[21] The force of blood pumping can split the layers of the artery wall, allowing blood to leak between them. This process is called a dissection, and it is one of the main causes of death from aortic aneurysms.^[3] A dissection causes a narrowing of the artery, which can block blood flow to organs and tissues.^[4]

Another complication involves the heart itself. When an aortic aneurysm is located near the heart, it can affect the aortic valve. Aortic insufficiency or aortic regurgitation may occur when the aortic valve does not close properly because a nearby section of the aorta is enlarged. This allows some blood to flow backward into the heart. As a result, the heart works harder, which may eventually lead to heart failure.^[21]

If an aneurysm ruptures, the complications are immediate and severe. A rupture causes serious bleeding inside the body and can lead to shock, a life-threatening condition where the body’s organs do not receive enough blood and oxygen.^[21] Cardiac tamponade can also occur, which is pressure on the heart from fluid or blood buildup between the heart muscle and the outer heart covering.^[21]

Other organs can also be affected by complications of an aortic aneurysm. Kidney failure can happen when there is a lack of blood flow to the kidneys.^[21] Reduced blood flow to the bowels may cause inflammation and injury in the large intestine.^[21] These complications highlight how an aneurysm, though located in one artery, can have widespread effects throughout the body.

Infection is another possible complication, especially after surgery to repair an aneurysm.^[21] Any surgical procedure carries a risk of infection, and infections related to aortic surgery can be particularly serious given the proximity to the heart and major blood vessels.

Impact on Daily Life

Living with an aortic aneurysm can feel overwhelming at first, but many people find that with proper management, they can continue to live active and fulfilling lives. However, the diagnosis does require some adjustments to daily routines and a heightened awareness of one’s health.

Physically, people with an aortic aneurysm may need to avoid certain activities that could put strain on the weakened blood vessel. Heavy lifting is generally discouraged because it can cause sudden increases in blood pressure, which may push against the walls of the aneurysm and cause it to expand.^[19] Doctors may also advise patients to avoid strenuous activities such as shoveling snow or chopping wood, as these can put strain on an existing aneurysm. However, moderate exercise is beneficial and encouraged.^[24] Activities like brisk walking or biking for at least 30 minutes on most days of the week can help maintain overall cardiovascular health without putting undue stress on the aneurysm.^[19]

Emotionally, learning that you have an aortic aneurysm can be frightening. It is natural to worry about what the diagnosis means for your health and your future.^[22] The fear of rupture can cause anxiety, and some people may find themselves constantly monitoring their bodies for warning signs. Managing stress becomes especially important, as high-stress and emotional situations can cause blood pressure to rise and increase the likelihood that an aneurysm may rupture.^[24] Patients may benefit from stress-reduction techniques such as meditation, deep breathing exercises, or speaking with a counselor.

Socially, the diagnosis may affect how a person engages with family and friends. Some individuals may feel hesitant to travel or participate in activities they once enjoyed, fearing a medical emergency far from home. Others may struggle with the need to make lifestyle changes, such as quitting smoking or changing their diet, which can feel isolating if friends and family do not share these goals. Open communication with loved ones about the condition and its management can help ease these social challenges.

Work life may also be impacted, particularly if a person’s job involves heavy physical labor. It may be necessary to discuss accommodations with an employer or, in some cases, consider a change in job duties to avoid activities that could be risky. For those whose work is less physically demanding, the impact on employment may be minimal, though regular medical appointments for monitoring the aneurysm may require time away from work.

Many patients find that hobbies and leisure activities can continue with some modifications. For example, someone who enjoys gardening may need to avoid heavy digging or lifting large pots, but can still enjoy planting flowers or tending to a vegetable garden with lighter tools. The key is to stay active and engaged in life while being mindful of activities that could pose a risk.

Support for Family Members

When someone is diagnosed with an aortic aneurysm, the entire family is affected. Family members often want to help but may not know what to do or how to provide support. Understanding the condition and how to assist your loved one can make a significant difference in their care and overall well-being.

One of the most important ways families can help is by encouraging and supporting lifestyle changes. Quitting smoking is the most important step a person with an aortic aneurysm can take to slow the growth of the aneurysm.^[19] If your loved one smokes, you can support their efforts to quit by helping them access resources such as medications, counseling options, or quitlines. Avoiding situations where they might be tempted to smoke and celebrating milestones in their quitting journey can provide crucial encouragement.

Helping with dietary changes is another practical way to support someone with an aortic aneurysm. Eating a heart-healthy diet rich in fruits and vegetables and low in cholesterol and saturated fats can help control blood pressure and cholesterol levels, decreasing the risk of aneurysm complications.^[19] Family members can assist by preparing healthy meals, reducing the amount of salt in cooking, and choosing low-sodium versions of common foods. Reading food labels together and learning about heart-healthy nutrition can be a helpful shared activity.

Families can also assist with monitoring and tracking health information. Helping your loved one keep a record of blood pressure readings, medication schedules, and upcoming appointments can reduce stress and ensure nothing is forgotten. Accompanying them to medical appointments can provide emotional support and an extra set of ears to listen to what the doctor says. Taking notes during appointments can be helpful for later reference.

If your family member is considering participating in a clinical trial for aortic aneurysm treatment, you can help by researching available trials, discussing the potential benefits and risks, and supporting their decision-making process. Clinical trials can offer access to new treatments and contribute to advancing medical knowledge, but they also require careful consideration. Being an informed and supportive partner in this decision can be invaluable.

Preparing for the possibility of surgery is another area where families can provide support. If a repair procedure is recommended, helping your loved one prepare for the hospital stay, arranging for time off work, and planning for the recovery period at home are all important tasks. Understanding what to expect during recovery, such as activity restrictions and signs of complications, can help the whole family feel more prepared.

Emotional support is perhaps the most vital role family members can play. Living with an aortic aneurysm can be frightening and stressful. Simply being present, listening to concerns, and offering reassurance can provide comfort. Encouraging your loved one to express their fears and worries, and validating those feelings, can help them cope with the psychological burden of the diagnosis.

Families should also be aware of the warning signs of a ruptured or dissected aneurysm. Knowing what symptoms to watch for—such as sudden, severe chest or abdominal pain, dizziness, or rapid heart rate—and understanding that these require an immediate call to 911 can save a life. Discussing an emergency plan with your loved one and knowing what steps to take in a crisis can reduce panic and ensure prompt action if an emergency occurs.

Finally, taking care of yourself as a family member or caregiver is essential. Supporting someone with a serious health condition can be emotionally and physically draining. Make sure to seek your own support when needed, whether through friends, support groups, or counseling. By taking care of your own well-being, you will be better able to provide the sustained support your loved one needs.