Aortic Stenosis: Valve Narrowing, Symptoms, and Treatment Options

Aortic stenosis is a form of heart valve disease in which the aortic valve becomes narrowed, making it harder for blood to leave the heart. With timely diagnosis and appropriate treatment, many people can manage symptoms and maintain better heart function.

Overview

Aortic stenosis is a condition in which the aortic valve, one of the heart’s four valves, becomes narrowed or stiff. The aortic valve sits between the left ventricle, the heart’s main pumping chamber, and the aorta, the large artery that carries oxygen-rich blood to the body. When this valve cannot open fully, the heart must work harder to push blood forward.

In the early stages, aortic stenosis may not cause noticeable symptoms. Over time, however, the narrowing can become more significant. The left ventricle may thicken as it pumps against increased resistance, and blood flow to the body may become limited, especially during physical activity.

Aortic stenosis is more common in older adults, but it can also occur in younger people, particularly those born with a bicuspid aortic valve. The condition ranges from mild to severe. Management depends on the severity of narrowing, symptoms, overall heart function, and a person’s general health.

Symptoms of Aortic Stenosis

Many people with mild or moderate aortic stenosis feel well and discover the condition only after a doctor hears a heart murmur during a routine examination. Symptoms usually develop gradually as the valve becomes more narrowed. Because changes can be slow, some people may unconsciously reduce their activity and not realize their exercise tolerance has declined.

Common symptoms of aortic stenosis include shortness of breath during exertion, chest tightness or chest pain, dizziness, fainting or near-fainting, fatigue, and palpitations. Some people notice swelling in the ankles or feet if heart function becomes affected. Symptoms are often more noticeable during walking uphill, climbing stairs, carrying heavy objects, or other activities that increase the heart’s workload.

Important symptoms may include:

• Breathlessness with activity or, in advanced cases, at rest
• Chest discomfort, pressure, or heaviness
• Lightheadedness, dizziness, or fainting
• Unusual tiredness or reduced ability to exercise
• Awareness of a fast, irregular, or forceful heartbeat

Symptoms do not always match the severity of valve narrowing. For this reason, people diagnosed with aortic stenosis need regular follow-up even if they feel well. A healthcare professional can monitor valve function and heart muscle response before complications develop.

Causes and Risk Factors

The most common cause of aortic stenosis in older adults is age-related calcification. Over many years, calcium deposits can build up on the valve leaflets, making them thicker and less flexible. This process is not the same as calcium intake from food, and people should not stop dietary calcium or prescribed supplements without medical advice.

Another important cause is a bicuspid aortic valve, a congenital condition in which the valve has two leaflets instead of the usual three. A bicuspid valve may function normally for years but can become narrowed or leaky earlier in life than a normal valve. Some people with a bicuspid valve may also have enlargement of the aorta, which requires monitoring.

Less common causes include rheumatic heart disease, which can occur after untreated or inadequately treated streptococcal infection, and prior chest radiation in some patients. Risk factors that may contribute to valve and cardiovascular disease include older age, high blood pressure, high cholesterol, smoking, diabetes, and chronic kidney disease.

Having risk factors does not mean a person will definitely develop severe aortic stenosis. However, controlling cardiovascular risk factors supports overall heart health and may reduce the likelihood of related complications.

Diagnosis and Severity Assessment

Diagnosis often begins with a medical history and physical examination. A doctor may hear a characteristic heart murmur through a stethoscope. The doctor will also ask about symptoms, activity level, previous heart conditions, family history, medications, and any history of fainting, chest discomfort, or breathlessness.

Echocardiography is the key test for diagnosing aortic stenosis. This ultrasound scan shows the aortic valve, measures blood flow across the valve, estimates the degree of narrowing, and evaluates how well the left ventricle is pumping. It can help classify the condition as mild, moderate, or severe.

Other tests may be used depending on the individual situation. An electrocardiogram may show heart rhythm or chamber enlargement. Chest X-ray can show heart size and lung congestion. Exercise testing may help assess symptoms in carefully selected people who appear asymptomatic. CT scans can assess valve calcium, the aorta, or anatomy before transcatheter procedures. Cardiac catheterization may be needed if coronary artery disease is suspected or if other test results are unclear.

Severity assessment is important because treatment decisions are based not only on how narrow the valve is, but also on symptoms, heart muscle function, age, frailty, other medical conditions, and personal preferences. Regular monitoring allows doctors to identify the right time for intervention.

Treatment Options

Treatment for aortic stenosis depends on severity. Mild or moderate disease may only require periodic check-ups, echocardiograms, and management of associated conditions such as high blood pressure, abnormal cholesterol, diabetes, or rhythm disorders. Medicines can help treat symptoms or related heart problems, but they cannot open a severely narrowed aortic valve.

When aortic stenosis becomes severe and causes symptoms, valve replacement is usually the main treatment. Surgical aortic valve replacement involves removing the narrowed valve and replacing it with a mechanical or biological valve. Mechanical valves can last a long time but usually require lifelong blood-thinning medication. Biological valves may not require lifelong anticoagulation for the valve itself, but they can wear out over time.

Transcatheter aortic valve implantation, also called TAVI or TAVR, is a less invasive approach in which a replacement valve is delivered through a catheter, commonly through an artery in the groin. It may be suitable for many patients, especially those at increased surgical risk, and is increasingly used in selected lower-risk patients as well. The choice between surgical replacement and TAVI depends on valve anatomy, age, life expectancy, surgical risk, vascular access, other heart conditions, and the expertise of the heart team.

Balloon valvuloplasty, in which a balloon is used to stretch the narrowed valve, is generally not a long-term solution for adults because the valve often narrows again. It may be used temporarily in selected situations, such as a bridge to valve replacement or when immediate stabilization is needed. A multidisciplinary heart team can explain the safest and most appropriate approach for each patient.

Living With Aortic Stenosis

People with aortic stenosis benefit from understanding their condition and attending scheduled follow-up visits. The frequency of monitoring depends on severity and any changes in symptoms. Patients should tell their doctor promptly if daily activities become harder, exercise tolerance decreases, or symptoms such as chest discomfort, breathlessness, dizziness, or fainting occur.

Healthy lifestyle choices support the heart and blood vessels. This includes not smoking, following a balanced diet, maintaining a healthy weight, managing blood pressure and cholesterol, controlling diabetes if present, and taking prescribed medicines as directed. Physical activity can be helpful, but the safe level of exercise depends on the severity of aortic stenosis and symptoms. People with moderate or severe disease should ask their cardiologist what activities are appropriate.

Good dental hygiene and regular dental care are also important for overall cardiovascular health. Some people with certain heart valve conditions or valve replacements may need antibiotics before specific dental or medical procedures to reduce the risk of infective endocarditis. This should be discussed with a doctor or dentist, as recommendations depend on individual risk.

Prevention and Self-Care

Not all forms of aortic stenosis can be prevented, especially when it is related to aging or a congenital bicuspid aortic valve. However, general heart-healthy habits may reduce overall cardiovascular risk and help patients remain as well as possible. Preventing and treating high blood pressure, high cholesterol, diabetes, and kidney disease is especially important.

Self-care includes monitoring symptoms and keeping a personal record of changes in activity tolerance. Patients may find it helpful to note when breathlessness occurs, how far they can walk, whether stairs have become more difficult, and whether dizziness or chest pressure appears with exertion. These observations can help clinicians make better decisions during follow-up visits.

People should avoid stopping or changing heart medicines without medical advice. If a valve procedure is planned, the care team will provide instructions about medications, eating and drinking before the procedure, dental evaluation if needed, and recovery expectations. After valve replacement, follow-up remains important to monitor the new valve, heart rhythm, and overall recovery.

When to See a Doctor

A person should see a doctor if they experience shortness of breath with activity, chest discomfort, unexplained fatigue, dizziness, fainting, or a noticeable decline in exercise capacity. These symptoms can have several causes, but they should not be ignored, particularly in people with a known heart murmur, a bicuspid aortic valve, or previously diagnosed aortic stenosis.

Urgent medical care is needed for severe chest pain, fainting, sudden worsening breathlessness, symptoms of stroke, or signs of acute heart failure such as marked difficulty breathing or severe swelling. Prompt assessment helps doctors determine whether symptoms are due to aortic stenosis or another heart or lung condition.

For international patients seeking evaluation, Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals can diagnose and treat aortic stenosis, including advanced valve procedures when appropriate. Patients should discuss individual risks, benefits, and alternatives with a qualified cardiologist or heart team before making treatment decisions.

Frequently asked questions

What is aortic stenosis?

Aortic stenosis is narrowing of the aortic valve, the valve that allows blood to leave the heart and enter the aorta. When the valve is narrowed, the heart must pump harder to send blood to the body. The condition can be mild, moderate, or severe.

Can aortic stenosis be treated with medication?

Medicines can help manage related problems such as high blood pressure, fluid retention, or heart rhythm issues. However, medication cannot reverse severe valve narrowing. When severe aortic stenosis causes symptoms or affects heart function, valve replacement is often needed.

What is the difference between SAVR and TAVI?

SAVR, or surgical aortic valve replacement, is an open-heart operation to remove and replace the narrowed valve. TAVI, also called TAVR, places a new valve through a catheter, often inserted through an artery in the groin. The best option depends on age, anatomy, surgical risk, other medical conditions, and heart team assessment.

Is aortic stenosis always serious?

Aortic stenosis can remain mild and stable for years in some people. It becomes more concerning when the narrowing is severe, symptoms develop, or heart function is affected. Regular monitoring helps doctors identify when treatment is needed.

Can someone with aortic stenosis exercise?

Many people with mild aortic stenosis can stay active, but exercise advice should be individualized. People with moderate or severe aortic stenosis, especially those with symptoms, should ask their cardiologist which activities are safe. Sudden dizziness, chest pain, or breathlessness during activity should be reported promptly.

How often should aortic stenosis be checked?

Follow-up frequency depends on whether the condition is mild, moderate, or severe and whether symptoms are present. A cardiologist usually recommends periodic echocardiograms to monitor valve narrowing and heart function. Patients should seek earlier review if symptoms change between appointments.

References

• American Heart Association
• European Society of Cardiology
• American College of Cardiology
• National Heart, Lung, and Blood Institute
• Mayo Clinic

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.