Ventricular Aneurysm
A weakened, bulging area in the wall of the heart's pumping chamber
Quick Facts
- Type: Heart (cardiac) condition
- Usual cause: Damage from a prior heart attack
- Most common site: The left ventricle
- Possible effects: Heart failure, arrhythmias, clots
Overview
A ventricular aneurysm is a bulging, thinned, and weakened area in the wall of one of the heart's pumping chambers, most often the left ventricle. It usually develops after a heart attack, when a section of heart muscle is damaged, dies, and is replaced by scar tissue. This scarred area can no longer contract normally and may stretch outward, forming a bulge.
Because the affected wall does not pump effectively, a ventricular aneurysm can reduce the heart's overall efficiency and lead to complications such as heart failure, abnormal heart rhythms, and blood clots. The condition is managed by treating these effects and the underlying heart disease, and in some cases with surgery.
Symptoms
Some people have no symptoms, while others develop signs related to the heart's reduced function or to complications:
- Shortness of breath, especially with activity or when lying down
- Chest pain or discomfort
- Fatigue and reduced ability to exercise
- Palpitations or an irregular heartbeat
- Swelling in the legs or ankles from fluid buildup
- Lightheadedness or fainting in some cases
If a blood clot forms in the aneurysm and travels, it can cause sudden symptoms such as stroke-like weakness or a painful, cold limb, which require emergency care.
Causes
Most ventricular aneurysms result from damage to the heart muscle:
- Prior heart attack: By far the most common cause, when blocked blood flow damages part of the heart wall and it scars and bulges.
- Less common causes: Infections of the heart, certain inflammatory or genetic conditions, congenital defects present from birth, or chest trauma.
Because heart attacks are the leading cause, the risk factors for coronary artery disease are closely linked to ventricular aneurysm.
Risk Factors
- A previous large heart attack
- Coronary artery disease
- High blood pressure
- High cholesterol
- Diabetes
- Smoking
Diagnosis
A ventricular aneurysm is often found while evaluating heart function after a heart attack:
- Echocardiogram: An ultrasound of the heart that shows the bulging wall and how well the heart pumps.
- Electrocardiogram (ECG): May show patterns suggesting a prior heart attack or aneurysm.
- Cardiac MRI or CT: Detailed imaging of the heart wall and scar tissue.
- Angiography: To assess the coronary arteries and the chamber.
Treatment
Treatment addresses the heart's function, prevents complications, and manages the underlying disease.
- Medications: Drugs to treat heart failure, control blood pressure, manage abnormal rhythms, and reduce strain on the heart.
- Blood thinners: May be used to lower the risk of clots forming in the aneurysm.
- Treating coronary disease: Procedures to restore blood flow, such as angioplasty or bypass surgery, when appropriate.
- Surgical repair: In selected cases, surgery to remove or reshape the aneurysm and improve heart function.
- Device therapy: An implantable defibrillator may be considered if dangerous rhythms are a risk.
Prevention
Preventing ventricular aneurysm largely means preventing heart attacks and getting prompt heart attack care:
- Control blood pressure, cholesterol, and blood sugar
- Do not smoke
- Eat a heart-healthy diet and stay physically active
- Seek emergency care quickly for heart attack symptoms, since fast treatment limits heart muscle damage
- Attend cardiac rehabilitation and follow-up after a heart attack
When to Seek Care
See a cardiologist if you have a history of heart attack and develop worsening shortness of breath, swelling, palpitations, or reduced exercise tolerance. Call emergency services immediately for signs of a heart attack (chest pain or pressure, pain spreading to the arm or jaw, shortness of breath, cold sweat), stroke (sudden face drooping, arm weakness, speech trouble), or a suddenly cold, pale, painful limb, which can signal a traveling blood clot.
Frequently Asked Questions
What causes a ventricular aneurysm?
Most ventricular aneurysms develop after a heart attack, when part of the heart muscle is damaged, scars, and bulges outward. Less commonly, they result from heart infections, inflammatory or genetic conditions, birth defects, or chest trauma.
Is a ventricular aneurysm dangerous?
It can be, because the bulging area pumps poorly and can lead to heart failure, abnormal heart rhythms, and blood clots that may travel and cause a stroke or blocked artery. Many people are managed effectively with medication and monitoring, and some need surgery.
What are the symptoms of a ventricular aneurysm?
Some people have no symptoms. Others experience shortness of breath, chest discomfort, fatigue, palpitations, or leg swelling. Sudden stroke-like symptoms or a cold, painful limb can occur if a clot travels and require emergency care.
How is a ventricular aneurysm treated?
Treatment includes medications for heart failure and rhythm problems, sometimes blood thinners to prevent clots, and treatment of the underlying coronary artery disease. Selected cases may benefit from surgical repair or an implantable defibrillator.
Can a ventricular aneurysm be prevented?
The best prevention is avoiding heart attacks by controlling blood pressure, cholesterol, blood sugar, and not smoking, and by seeking emergency care quickly for heart attack symptoms so that heart muscle damage is limited.
References
- National Heart, Lung, and Blood Institute (NHLBI). Heart Attack.
- MedlinePlus, U.S. National Library of Medicine. Heart attack.
- American Heart Association. Complications After a Heart Attack.
- Mayo Clinic. Heart attack — Symptoms and causes.