Aortic Stenosis: When the Heart's Main Outflow Valve Narrows with Age

What Is Aortic Stenosis?

Your heart works as a pump — it pushes oxygen-rich blood out through a large vessel called the aorta and on to the rest of your body. The aortic valve sits right at this exit point, opening and closing with every single heartbeat. In a healthy heart, this valve opens wide to let blood flow freely.

In aortic stenosis, the valve opening becomes narrow — sometimes severely so. Instead of opening fully, the valve leaflets (flaps) stiffen and thicken over time, often due to calcium deposits that build up with age. The heart has to work much harder to push blood through this tight opening. Over years, this extra strain can weaken the heart muscle and lead to serious complications if left untreated.

Aortic stenosis is one of the most common heart valve problems in adults over 65, and its prevalence is rising as our population lives longer. Understanding aortic stenosis symptoms and treatment early can make a real difference to how well a person lives — and how long.

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What Causes the Valve to Narrow?

There is no single cause of aortic stenosis. The most frequent reasons include:

• Age-related calcium build-up (calcific aortic stenosis): The most common cause in adults over 65. Over decades, calcium deposits collect on the valve leaflets, making them stiff and restricted. Think of it like lime-scale building up inside a pipe.
• Bicuspid aortic valve: Most people are born with a three-leaflet aortic valve. Around 1–2% of people are born with only two leaflets (a bicuspid valve). This structural difference causes extra wear and tear, and these individuals may develop stenosis earlier — sometimes in their 40s or 50s.
• Rheumatic fever: Rheumatic heart disease, which follows untreated streptococcal throat infection, remains a significant cause of valve disease in India, including in Gujarat. It can scar and fuse the valve leaflets.

Risk factors that may speed up valve calcification include high blood pressure, high cholesterol, diabetes, smoking, and chronic kidney disease — many of the same risk factors as coronary artery disease.

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Recognising the Symptoms: What to Watch For

Aortic stenosis is often described as a "silent" condition in its early stages. The valve can be narrowing for years without a person noticing anything unusual. However, once symptoms appear, they usually signal that the disease has become severe — and this is the point at which action is most important.

The classic triad of symptoms of severe aortic stenosis are:

1. Chest Pain or Tightness (Angina)

A feeling of pressure, tightness, or discomfort in the chest — especially during physical activity — is one of the earliest warning signs. The heart muscle is not getting enough blood because the narrowed valve restricts flow.

2. Fainting or Near-Fainting (Syncope)

Sudden dizziness, light-headedness, or actually blacking out — particularly during exertion — is a red flag. When the heart cannot pump enough blood to the brain, consciousness can be briefly lost.

3. Breathlessness (Heart Failure Symptoms)

Shortness of breath during activity, difficulty lying flat at night, waking up gasping, or ankles swelling up can all indicate that the heart is struggling to keep up with the body's demands.

Other symptoms to be aware of:

• Feeling unusually tired or fatigued with everyday activities
• A heart murmur (heard by a doctor through a stethoscope — patients rarely notice this themselves)
• Palpitations or an irregular heartbeat

Important: If you or a family member — especially someone over 60 — is experiencing unexplained breathlessness, chest discomfort, or fainting episodes, please do not dismiss it as "just old age." These symptoms warrant prompt evaluation by a cardiologist.

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How Is Aortic Stenosis Diagnosed?

The good news is that diagnosing aortic stenosis is straightforward with the right tests. Here is what a cardiologist typically looks for:

Physical Examination

A doctor will listen to the heart with a stethoscope. Aortic stenosis produces a characteristic heart murmur — a harsh, crescendo-decrescendo sound — that an experienced cardiologist can identify.

Echocardiogram (Echo)

This is the single most important test. An echocardiogram uses sound waves to create a moving picture of the heart. It can show:

• How open (or narrow) the valve is
• The speed and pressure of blood flowing through the valve
• How well the heart muscle is pumping
• The size and thickness of the heart chambers

It is non-invasive, comfortable, and does not involve radiation. Most cardiology clinics in Rajkot, including advanced imaging centres, can perform this test.

Additional Tests

• ECG (electrocardiogram): Checks for heart rhythm abnormalities and signs of heart muscle strain.
• Chest X-ray: Can show an enlarged heart or fluid in the lungs.
• CT scan of the heart/aorta: Used when planning certain procedures, especially to measure valve anatomy in detail.
• Coronary angiogram: Often performed before valve intervention to check whether the heart arteries also need attention.

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Understanding Severity: Mild, Moderate, and Severe

Aortic stenosis is classified by how much the valve has narrowed:

Severity	Valve Area	What It Means
Mild	> 1.5 cm²	Close monitoring; lifestyle care
Moderate	1.0–1.5 cm²	Regular follow-up; symptom watch
Severe	< 1.0 cm²	Treatment usually needed if symptomatic

Patients with mild or moderate stenosis often need no immediate procedure — but regular follow-up with an echocardiogram (usually every 1–3 years) is essential so that any worsening is caught early.

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Aortic Stenosis Treatment Options

This is where modern cardiology has made truly remarkable progress. Aortic stenosis symptoms and treatment have been transformed over the last two decades, particularly for elderly patients who were once considered too frail for surgery.

Medical Management (Medicines)

There is currently no medication that can reverse or slow the narrowing of the aortic valve itself. However, medicines play an important supporting role:

• Managing blood pressure to reduce strain on the heart
• Treating heart failure symptoms (diuretics, for example)
• Controlling cholesterol, diabetes, and other risk factors

Medicines alone cannot treat severe aortic stenosis — valve intervention is needed once symptoms develop.

Surgical Aortic Valve Replacement (SAVR)

For decades, open-heart surgery to replace the diseased valve has been the standard treatment. The narrowed valve is removed and replaced with either a mechanical valve (durable, requires lifelong blood thinners) or a tissue/biological valve (does not require long-term blood thinners but may need replacement after 15–20 years).

SAVR remains an excellent option for younger, lower-risk patients with good overall health.

Transcatheter Aortic Valve Replacement (TAVR / TAVI)

TAVR (also called TAVI — Transcatheter Aortic Valve Implantation) has been a game-changer for patients with severe aortic stenosis, especially those who are elderly or have other health conditions that make open surgery high-risk.

In TAVR, a new valve is delivered through a thin, flexible tube (catheter) inserted through an artery — most commonly in the groin. The new valve is placed inside the old diseased valve without removing it, and it immediately takes over the function of opening and closing. The procedure is performed in a specialised catheterisation laboratory by an interventional cardiologist working with a cardiac surgery team.

Benefits of TAVR:

• Avoids open-chest surgery
• Shorter hospital stay (often 2–4 days)
• Faster recovery
• Suitable for high- and intermediate-risk surgical patients

As an interventional cardiologist, Dr. Nikhila Pachani is trained in catheter-based procedures and works within a multidisciplinary heart team to evaluate and manage patients with valve disease, including guiding appropriate referrals for TAVR where indicated in Rajkot and across Saurashtra.

Balloon Valvuloplasty

In selected cases — for example, a young patient with rheumatic aortic stenosis, or as a temporary measure to stabilise a very unwell patient — a balloon can be inflated across the narrowed valve to widen it. This is not a permanent solution for age-related calcific stenosis, but it has specific uses.

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Living with Aortic Stenosis: What Patients Can Do

Whether you are waiting for a procedure or managing mild disease, these steps support heart health:

• Attend all follow-up appointments and do not skip your echocardiogram schedule.
• Report new or worsening symptoms immediately — do not wait for the next scheduled visit.
• Stay active at a comfortable level — ask your cardiologist what exercise is safe for you.
• Manage blood pressure, cholesterol, and blood sugar with medicines and a healthy diet.
• Avoid smoking and tobacco in any form.
• Eat a heart-friendly diet rich in vegetables, whole grains, pulses, and fruits — much of traditional Gujarati cooking can be adapted to be heart-healthy with simple modifications like reducing oil and salt.
• Inform your dentist and any surgeon about your valve condition before any procedure, as precautions may be needed.

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Key Takeaways

• Aortic stenosis is a narrowing of the heart's main outflow valve, most commonly due to age-related calcium build-up.
• Symptoms — chest pain, fainting, and breathlessness — often appear only when the disease is severe; never ignore them.
• Diagnosis is safe and straightforward using an echocardiogram and clinical examination.
• There is no medicine that reverses valve narrowing; surgical or catheter-based valve replacement is needed for severe symptomatic disease.
• TAVR has transformed care for elderly and high-risk patients, offering valve replacement without open-heart surgery.
• Regular follow-up with a cardiologist is essential — even before symptoms develop.

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If you or a loved one has been told about a heart murmur, or you are experiencing unexplained breathlessness, chest discomfort, or dizziness, we encourage you to seek a timely consultation with a qualified cardiologist. Early evaluation can make all the difference.