Aortic Stenosis: Symptoms, Causes, Complications, Treatment, and Prevention

What comes to mind when you hear about heart disease? Most of us probably think of an abnormal heartbeat, or perhaps a sudden heart attack. But did you know that aortic valve stenosis, commonly called aortic stenosis, a narrowing of the aortic valve, is a condition that is just as serious and can be life-threatening if not treated properly?

Aortic valve stenosis is one of the fairly common heart valve diseases, especially among older adults. According to data from the World Health Organization (WHO), about 2 to 7% of the global population over 65 years of age has this condition. In Indonesia, although specific data on aortic stenosis is still limited, the prevalence of heart disease in general continues to rise. Data from the Indonesian Ministry of Health (Kemenkes) show that cardiovascular disease, including heart valve problems, is the leading cause of death in Indonesia, with the number of cases continuing to rise every year.

These facts underline the importance of awareness about heart health, especially regarding conditions such as aortic stenosis, which often show no symptoms until they reach an advanced stage. By understanding this disease more deeply, we can take preventive steps and seek the right medical treatment before it is too late.

01 / Heart Disease

What Is Aortic Stenosis?

Aortic stenosis is a medical condition in which the aortic valve, the valve that serves as the exit door for blood leaving the heart to the rest of the body, narrows or cannot open fully. This narrowing obstructs blood flow from the heart to the large blood vessel (the aorta) and on to the rest of the body. As a result, the heart has to work harder to pump blood, which over time can damage the heart muscle and lead to other serious complications.

Aortic valve stenosis often develops slowly and may cause no symptoms in its early stages. Over time, however, this condition can get worse and become life-threatening if not treated properly.

The Function of the Aortic Valve and How Stenosis Affects Blood Flow

The aortic valve is one of the four heart valves that play an important role in regulating blood flow. This valve is located between the left lower chamber of the heart (the left ventricle) and the aorta, the large blood vessel that carries oxygen-rich blood to the rest of the body. The main function of the aortic valve is to open and close regularly to make sure blood flows in one direction, from the heart to the aorta, without flowing back.

In aortic stenosis, this valve cannot open fully because it has narrowed or thickened. This obstructs blood flow from the heart to the aorta. As a result, the heart has to pump harder to overcome this obstruction. Over time, this extra workload can lead to thickening of the heart muscle (left ventricular hypertrophy), heart strain, and even heart failure if not treated.

Types of Aortic Stenosis

Aortic stenosis can be divided into three main types based on its cause. Each type has different characteristics and risk factors:

1. Congenital aortic stenosis (present from birth): Congenital aortic stenosis occurs when a person is born with an abnormal aortic valve. A normal aortic valve usually has three leaflets (tricuspid), but in these cases the valve may have only two leaflets (bicuspid) or even one. This abnormality makes the valve more prone to narrowing over time. Symptoms may not appear at birth but can develop with age, especially between the ages of 30 and 40. About 1 to 2% of the global population is born with a bicuspid aortic valve, and most of them will develop aortic stenosis later in life.
2. Degenerative aortic stenosis (due to aging): Degenerative aortic stenosis is the most common type and usually occurs in older adults. With age, calcium can build up on the aortic valve, causing the valve to thicken and stiffen. This process is known as aortic valve calcification. Symptoms often appear after the age of 60 to 70 and include shortness of breath, chest pain, and fatigue. About 2 to 7% of people over 65 have degenerative aortic stenosis, and this figure increases with age.
3. Aortic stenosis due to rheumatic heart disease: Rheumatic heart disease is a complication of rheumatic fever, which is caused by a streptococcal bacterial infection that was not treated properly. This infection can cause inflammation of the heart valves, including the aortic valve, eventually leading to narrowing and permanent damage. Symptoms can appear at a younger age, usually between 20 and 50, and are often accompanied by a history of rheumatic fever. Rheumatic heart disease is more common in developing countries, including Indonesia, where access to treatment for streptococcal infections is still limited.

02 / Heart Disease

Symptoms of Aortic Stenosis to Watch Out For

Aortic stenosis is often called a “silent killer” because its symptoms may not be felt in the early stages. However, as the disease progresses, symptoms will begin to appear and get worse if not treated. Here are the symptoms to watch out for:

Common Symptoms

The symptoms of aortic valve stenosis can vary depending on how severely the aortic valve has narrowed. Some commonly reported symptoms include:

• Shortness of breath: Especially during activity or when lying down.
• Chest pain (angina): A heavy or pressing feeling in the chest that may spread to the neck, jaw, or shoulders.
• Fatigue: Tiring easily, even after light activity.
• Dizziness or fainting: Occurs because blood flow to the brain is insufficient.
• Palpitations (a pounding heart): The sensation of a heartbeat that is irregular or too fast.

These symptoms appear because the heart works harder to pump blood through the narrowed valve, so the blood supply to the rest of the body, including the brain and muscles, is no longer optimal.

Symptoms That Appear During Physical Activity

Physical activity requires a greater supply of blood and oxygen throughout the body. In people with aortic valve stenosis, a heart that is already working hard cannot meet this demand, so symptoms are often more noticeable during activity, such as:

• Severe shortness of breath: Even after walking a short distance or climbing stairs.
• Chest pain that gets worse: Especially during exercise or strenuous activity.
• Extreme fatigue: The body feels very tired and drained of energy after activity.
• Sudden fainting: Occurs because blood flow to the brain drops suddenly.

If you experience these symptoms during activity, stop the activity immediately and consult a doctor.

Differences in Symptoms Between Older and Younger People

The symptoms of aortic stenosis can differ between older adults and younger people, depending on the cause and overall health:

• In older adults:
  • Symptoms tend to be milder in the early stages because the body has adapted to changes that happen slowly.
  • Common symptoms are fatigue, shortness of breath, and chest pain, which may be mistaken for normal signs of aging.
  • Older adults are also more prone to sudden fainting because of a significant decline in heart function.
• In younger people:
  • Symptoms are often more obvious and appear sooner, especially if they are caused by a congenital defect such as a bicuspid aortic valve.
  • Younger people may more often experience palpitations (a pounding heart) and chest pain during activity.
  • Fainting or severe shortness of breath is also more common in this age group.

When to Seek Medical Help Immediately

Aortic valve stenosis is a serious condition that requires prompt medical treatment, especially if the following symptoms appear:

• Severe chest pain that does not go away: This may be a sign that the heart is not getting enough oxygen.
• Sudden or severe shortness of breath: Especially if it occurs at rest or during light activity.
• Fainting or loss of consciousness: This indicates that blood flow to the brain is impaired.
• An irregular or very fast heartbeat: This may be a sign of a complication such as arrhythmia.
• Extreme fatigue with no clear reason: If you feel very tired even after resting.

If you or someone close to you experiences these symptoms, seek medical help immediately. Early detection and treatment can prevent serious complications such as heart failure, heart attack, or even sudden death.

03 / Heart Disease

Risk Factors for Aortic Stenosis

Aortic stenosis can be caused by various factors, from congenital conditions to environmental and lifestyle influences. Understanding these risk factors is important for early prevention and faster detection. Here are some of the main risk factors to look out for:

Genetic and Congenital Factors

Some people are born with an abnormal aortic valve, which makes them more prone to aortic valve stenosis later in life. These genetic and congenital factors include:

1. Bicuspid aortic valve: The aortic valve usually has three leaflets (tricuspid), but about 1 to 2% of the population is born with a bicuspid aortic valve (only two leaflets). This condition increases the risk of the valve narrowing with age.
2. Family history: If a family member has heart valve disease or aortic stenosis, your risk of developing a similar condition is also higher.

These congenital factors often cause symptoms to appear earlier, usually between the ages of 30 and 40, and require regular monitoring by a cardiologist.

Age and Valve Degeneration

With age, the aortic valve can undergo natural aging and wear. This process is known as valve degeneration, which includes:

• Calcium buildup: Over time, calcium can build up on the aortic valve, causing the valve to thicken and stiffen. This condition is called aortic valve calcification and is the main cause of aortic stenosis in older adults.
• Prevalence: About 2 to 7% of people over 65 have degenerative aortic stenosis, and this figure rises significantly after the age of 70.

Valve degeneration is a natural process that cannot be avoided, but early detection and proper treatment can slow the progression of the disease.

Rheumatic Heart Disease

Rheumatic heart disease is a complication of rheumatic fever, which is caused by a streptococcal bacterial infection that was not treated properly. This infection can cause inflammation of the heart valves, including the aortic valve, eventually leading to narrowing and permanent damage.

• Risk factors: Rheumatic heart disease is more common in areas with limited access to antibiotic treatment, including some regions of Indonesia.
• Impact: Chronic inflammation of the aortic valve can cause aortic valve stenosis, especially in the 20 to 50 age group.

Preventing rheumatic fever through proper treatment of streptococcal infections can reduce the risk of rheumatic heart disease and aortic stenosis.

Infections and Other Diseases

Several infections and other diseases can also increase the risk of aortic stenosis, including:

• Infective endocarditis: An infection of the inner lining of the heart, including the heart valves, that can damage the aortic valve and cause narrowing.
• Atherosclerosis: Plaque buildup in the blood vessels can affect the aortic valve, especially if the plaque spreads to the valve area.
• Hypertension (high blood pressure): Uncontrolled high blood pressure can put extra strain on the aortic valve, speeding up the degeneration process.
• Chronic kidney disease: Patients with chronic kidney disease have a higher risk of aortic valve calcification because of disturbed calcium metabolism.

04 / Heart Disease

Diagnosing Aortic Stenosis

Diagnosing aortic stenosis requires a series of examinations, from a physical examination to advanced diagnostic tests. This process is important for determining the severity of the condition and planning the right treatment. Here are the steps usually taken:

1. Physical Examination

A physical examination is the first step the doctor takes to evaluate the condition of the heart and detect signs of aortic valve stenosis. Some of the things checked include:

• Listening to heart sounds (auscultation): The doctor will use a stethoscope to listen to the heart. In people with aortic stenosis, a characteristic whooshing sound (murmur) is often heard because of abnormal blood flow through the narrowed valve.
• Checking the pulse: A weak or irregular pulse can be a sign that the heart is not pumping blood effectively.
• Checking for other symptoms: The doctor will also ask about symptoms such as shortness of breath, chest pain, or fainting that the patient may have experienced.

This physical examination provides early clues, but it usually needs to be followed by diagnostic tests to confirm the diagnosis.

2. Diagnostic Tests

To confirm a diagnosis of aortic stenosis and assess its severity, the doctor will recommend several diagnostic tests, including:

1. Echocardiogram (heart ultrasound): An echocardiogram uses sound waves to create images of the structure and function of the heart, including the aortic valve. It can show narrowing of the aortic valve, the thickness of the heart walls, and how well the heart pumps blood. The echocardiogram is the main test used to diagnose aortic stenosis and monitor its progression.
2. Electrocardiogram (ECG): An ECG records the heart’s electrical activity. It can detect thickening of the heart muscle (left ventricular hypertrophy) or heart rhythm disturbances (arrhythmias) that often occur in people with aortic stenosis.
3. Chest X-ray: This test uses X-rays to produce images of the heart and lungs. A chest X-ray can show an enlarged heart or calcium buildup on the aortic valve.
4. Cardiac catheterization: This procedure involves inserting a catheter (a thin tube) into a blood vessel leading to the heart. Cardiac catheterization is used to measure the pressure inside the heart chambers and assess how severely the aortic valve has narrowed. This test is usually done if the echocardiogram results are not clear enough or before surgery.
5. Cardiac CT scan or MRI: Advanced imaging tests that provide detailed images of the heart’s structure. A CT scan or MRI can be used to evaluate the condition of the aortic valve and the surrounding blood vessels, especially if surgery is planned.

The Importance of Early Diagnosis to Prevent Serious Complications

Early diagnosis of aortic valve stenosis is very important to prevent serious complications that can be life-threatening. Some reasons why early diagnosis is needed:

• Preventing heart failure: Untreated aortic stenosis can make the heart work too hard, which eventually leads to heart failure.
• Avoiding sudden complications: Without treatment, aortic stenosis can cause a heart attack, stroke, or even sudden death.
• Improving quality of life: With an early diagnosis, patients can get the right care, such as medication, therapy, or surgery, to reduce symptoms and improve their quality of life.

Patients who are diagnosed and treated early have better chances of survival and a lower risk of complications than those who receive treatment late.

If you experience symptoms such as shortness of breath, chest pain, or fainting, do not hesitate to consult a doctor. The sooner aortic valve stenosis is detected, the greater the chance of getting effective treatment and preventing serious complications.

05 / Heart Disease

Treating Aortic Stenosis

Treatment for aortic stenosis depends on the severity of the condition, the symptoms experienced, and the patient’s overall health. There are two main approaches to managing aortic stenosis: non-surgical treatment and surgical procedures. Here is a complete explanation:

1. Non-Surgical Treatment

Non-surgical treatment is usually recommended for patients with mild to moderate aortic stenosis or for those who are not yet eligible for surgery. Some of the methods included in non-surgical treatment are:

1. Regular monitoring: People with mild aortic stenosis who do not yet have symptoms are strongly advised to have regular check-ups at least every 6 to 12 months.
2. Medications: Medication aims to reduce symptoms and prevent complications, although it cannot cure aortic stenosis. The types of medication doctors commonly prescribe include:
   • Medications to control high blood pressure.
   • Medications to relieve symptoms such as chest pain (nitrates) or excess fluid (diuretics).
   • Medications to regulate the heart rate (beta-blockers or calcium channel blockers).
3. Lifestyle changes:
   • Avoiding strenuous activities that can strain the heart.
   • Eating heart-healthy foods that are low in salt and saturated fat.
   • Quitting smoking and limiting alcohol consumption.

2. Surgical Procedures

If aortic valve stenosis is already severe or causes significant symptoms, a surgical procedure may be needed. Some surgical options include:

1. Open-heart valve replacement (Surgical Aortic Valve Replacement/SAVR): This procedure involves replacing the damaged aortic valve with a mechanical valve or a biological valve (made from animal or human tissue). SAVR is effective for patients whose valve condition is very severe.
2. Valve replacement through a catheter (Transcatheter Aortic Valve Replacement/TAVR): A minimally invasive procedure in which a new valve is inserted through a blood vessel in the leg or chest without opening the chest. TAVR is suitable for older patients or those at high risk for open surgery. Recovery is faster than with SAVR.
3. Balloon widening of the valve (Balloon Valvuloplasty): This procedure uses a balloon to widen the narrowed aortic valve. Balloon valvuloplasty can be performed in patients who are not eligible for valve replacement surgery.

When Is Surgery Needed?

Surgery is usually recommended in the following situations:

1. Severe symptoms: If the patient has symptoms such as severe shortness of breath, chest pain, or fainting.
2. Severe aortic stenosis: If test results show significant narrowing of the valve.
3. Impaired heart function: If the heart begins to show signs of damage, such as thickening of the heart muscle or reduced pumping function.

According to the American College of Cardiology (ACC), valve replacement surgery is the recommended option for patients with severe aortic stenosis who have symptoms, because it can significantly improve life expectancy and quality of life.

Post-Operative Care

After surgery, patients need post-operative care to ensure optimal recovery:

1. Regular monitoring: Patients will have regular check-ups, including an echocardiogram, to make sure the new valve is working properly.
2. Medications: Patients may need to take blood thinners (especially if they have a mechanical valve) or medication to prevent infection.
3. Cardiac rehabilitation: A cardiac rehabilitation program can help patients recover faster and improve their physical fitness.
4. Lifestyle changes: Patients are advised to maintain a healthy diet, quit smoking, and exercise regularly as recommended by their doctor.

With proper treatment and good post-operative care, patients with aortic stenosis can return to an active and productive life.

06 / Heart Disease

Complications of Untreated Aortic Stenosis

Untreated aortic stenosis can lead to various serious, life-threatening complications. This condition affects not only the heart but also other organs that depend on an adequate blood supply. Here are some potential serious complications to watch out for:

1. Heart failure: Heart failure is one of the most serious complications of untreated aortic stenosis. It occurs when the heart is unable to pump blood effectively to the rest of the body. In aortic stenosis, the heart has to work harder to overcome the narrowed aortic valve. Over time, the heart muscle becomes weak and cannot function properly. Symptoms of heart failure include severe shortness of breath, extreme fatigue, swelling in the legs, and fluid buildup in the lungs. Heart failure can significantly reduce quality of life and increase the risk of death if not treated properly.
2. Arrhythmia (heart rhythm disorder): Arrhythmia is a condition in which the heartbeat is irregular, whether too fast, too slow, or uneven. The extra workload on the heart caused by aortic valve stenosis can disrupt the heart’s electrical system, causing arrhythmia. Symptoms of arrhythmia include palpitations (a pounding heart), dizziness, fainting, or fatigue. Severe arrhythmias, such as ventricular fibrillation, can cause sudden cardiac arrest and death. This condition requires immediate medical treatment to prevent fatal consequences.
3. Infective endocarditis: Infective endocarditis is an infection of the inner lining of the heart, including the heart valves, caused by bacteria or other microorganisms. A damaged or narrowed aortic valve is more prone to infection, especially if there is a history of medical or dental procedures that allow bacteria to enter the bloodstream. Symptoms of infective endocarditis include fever, fatigue, muscle pain, and flu-like symptoms. If left untreated, this infection can further damage the heart valves and spread to other organs, causing more serious complications.
4. Heart attack: A heart attack occurs when blood flow to the heart muscle is blocked, causing damage to the heart tissue. Severe aortic stenosis can reduce blood flow to the coronary arteries, which supply blood to the heart muscle. Symptoms of a heart attack include severe chest pain, shortness of breath, cold sweats, and nausea. A heart attack can cause permanent damage to the heart muscle and increase the risk of death. Prompt treatment is very important to minimize damage and save lives.
5. Stroke: A stroke occurs when blood flow to the brain is blocked or reduced, causing damage to brain cells. Aortic stenosis can lead to the formation of blood clots in the heart, which can then travel to the brain and block a blood vessel. Stroke symptoms include weakness or numbness on one side of the body, difficulty speaking, or sudden loss of vision. A stroke can cause permanent disability or death, so prevention and early treatment are very important.
6. Sudden death: Sudden death is the most feared complication of untreated aortic stenosis. It occurs without any prior warning signs, often as a result of severe arrhythmia or cardiac arrest. Untreated aortic stenosis can cause fatal heart rhythm disturbances, especially in patients with severe symptoms. Sudden death can occur even in patients who previously seemed healthy, so early detection and proper treatment are very important to prevent this complication.

According to data from the American Heart Association (AHA), patients with severe untreated aortic stenosis have a high mortality rate, with 50% of patients dying within 2 years after symptoms appear. That is why early detection and proper treatment are very important to prevent these serious complications.

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Prevention and Long-Term Management

Aortic valve stenosis is a serious condition that can be prevented and managed with the right steps. Prevention and long-term management not only help reduce the risk of developing this disease but also ensure a better quality of life for those who have already been diagnosed. Here are some important steps you can take:

The Importance of Regular Check-Ups for Early Detection

Regular check-ups are key to detecting aortic stenosis early, especially for high-risk groups such as older adults, people with a family history of heart disease, or those with a congenital valve abnormality. Early detection allows faster and more effective treatment, preventing the disease from progressing to a more severe stage.

Regular check-ups include consultations with a cardiologist, an echocardiogram (heart ultrasound), and blood tests to evaluate overall heart health.

Regular check-ups every 1 to 2 years are recommended for people without symptoms. However, people with risk factors, such as a bicuspid aortic valve or a history of heart disease, may need check-ups more often, as recommended by their doctor. Early detection of aortic stenosis can help reduce the risk of serious complications such as heart failure, heart attack, or sudden death.

Tips for Keeping Your Heart Healthy

Keeping your heart healthy is an important step in preventing aortic stenosis and other cardiovascular diseases. Here are some tips you can follow:

1. Healthy diet: Eat foods that are rich in fiber and low in salt and saturated fat. Eat more fruits, vegetables, whole grains, and fish rich in omega-3. Avoid processed foods and foods high in sugar.
2. Regular exercise: Do physical activities such as brisk walking, cycling, or swimming for at least 30 minutes a day, 5 times a week. Exercise helps maintain an ideal body weight and improves heart health.
3. Avoid cigarettes and alcohol: Smoking and excessive alcohol consumption can damage blood vessels and increase the risk of heart disease.
4. Manage stress: Uncontrolled stress can raise blood pressure and the heart’s workload. Try relaxation techniques such as yoga, meditation, or spending time on activities you enjoy.
5. Control blood pressure and cholesterol: High blood pressure and high cholesterol are major risk factors for heart disease. Be sure to have your blood pressure and cholesterol levels checked regularly, and follow your doctor’s advice if medication is needed.

Regular Screening and Consultations With a Cardiologist

Regular screening and consultations with a cardiologist are important steps in preventing and managing aortic stenosis, especially for people who have risk factors or have already been diagnosed with this condition.

• Heart screening aims to detect heart abnormalities or problems early, before symptoms appear or the condition becomes more severe. Common tests include an echocardiogram (heart ultrasound) to evaluate the structure and function of the aortic valve, an electrocardiogram (ECG) to check the heart’s electrical activity, and blood tests to assess cholesterol levels, blood sugar, and inflammatory markers that can affect heart health.
• Regular consultations with a cardiologist are also very important for getting personalized recommendations based on your health condition. The doctor can give guidance on lifestyle changes, such as a healthy diet, regular exercise, and stress management, that can help keep your heart healthy. In addition, for patients who have already been diagnosed with aortic stenosis, the doctor can plan long-term monitoring, including how often check-ups are needed and suitable treatment options, such as medication or surgery if needed.

For people with other medical conditions such as diabetes, hypertension, or high cholesterol, regular consultations with a cardiologist also help manage these conditions effectively. For example, uncontrolled high blood pressure can worsen aortic valve stenosis, so it is important to monitor and treat it properly. According to the European Society of Cardiology (ESC), patients who have regular screening and consultations have a greater chance of avoiding serious complications and improving their life expectancy. Regular screening and consultations are therefore not only a preventive step but also a long-term investment in better heart health.

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Conclusion

Aortic stenosis is a serious condition in which the aortic valve narrows, obstructing blood flow from the heart to the rest of the body. This disease can be caused by congenital factors, aging, rheumatic heart disease, or infection. Symptoms include shortness of breath, chest pain, fatigue, and fainting, which are often not felt until the condition is already severe. Early diagnosis through a physical examination, an echocardiogram, and other tests is very important to prevent complications such as heart failure, arrhythmia, or even sudden death. Treatment for aortic stenosis varies, from regular monitoring and medication to surgical procedures such as aortic valve replacement. Prevention and long-term management, including regular check-ups, a healthy lifestyle, and consultations with a cardiologist, can help reduce risk and improve quality of life.

Heart health is a long-term investment that affects your overall quality of life. Aortic stenosis and other cardiovascular diseases can often be prevented with simple steps, such as maintaining a healthy diet, exercising regularly, avoiding cigarettes, and managing stress. It is important to always stay alert to symptoms that may appear and not to ignore small signs that could indicate a heart problem. By looking after your cardiovascular health, you not only protect yourself but also set a positive example for your family and the people closest to you.

Do not wait until severe symptoms appear before having your heart checked. Start with small steps, such as scheduling regular check-ups with a cardiologist, especially if you have risk factors such as a family history of heart disease, high blood pressure, or high cholesterol. Invite your family to adopt a healthy lifestyle together, such as eating nutritious food, being physically active regularly, and avoiding unhealthy habits such as smoking.

Remember that the information in this article is educational and is not a substitute for professional medical advice. If you have symptoms or risk factors of aortic stenosis or other cardiovascular disease (disease of the heart and blood vessels), consult a specialist doctor promptly or visit Heartology Cardiovascular Hospital for proper evaluation and care.

At Heartology Cardiovascular Hospital, cardiovascular specialists can explain your condition, the available examination and treatment options, and their risks and benefits, as well as answer your questions about heart and blood vessel health.