Aortic stenosis

What Is Aortic Stenosis?

Aortic stenosis is a progressive heart valve condition in which the aortic valve narrows over time, restricting blood flow from the heart to the rest of the body. It’s the most common cause of blood flow obstruction from the heart’s main pumping chamber and becomes significantly more common with age, affecting nearly 10% of people in their 80s compared with about 0.2% of people in their 50s.¹
As the valve narrows, the heart must work harder to push blood through the smaller opening, a strain that eventually leads to symptoms and can weaken the heart muscle over time if left untreated.²

Aortic stenosis is a progressive valvular disorder characterized by increasing fibrosis and calcification of the valve.
National Center for Biotechnology Information

Causes

The most common cause of aortic stenosis in adults in Europe and the United States is calcific aortic valve disease, a process involving chronic inflammation of the valve tissue, deposition of fatty compounds, and gradual calcium buildup that stiffens the valve leaflets over years to decades.¹
Less commonly, aortic stenosis can result from a congenital valve abnormality present from birth, such as a valve with two leaflets instead of the usual three, or from rheumatic fever related valve damage, which is now more common outside high income countries.

Symptoms

Aortic stenosis often develops silently for years before producing symptoms, since the heart initially compensates for the narrowing valve. As the condition progresses, common symptoms include chest pain, shortness of breath, and eventually dizziness or fainting, particularly with physical exertion.²
Symptom onset is an important turning point in aortic stenosis, since once symptoms appear, the condition tends to progress more quickly and carries a notably higher risk without treatment.

Risk Factors

Age is the strongest risk factor, given the condition’s link to gradual valve calcification. Other risk factors include high blood pressure, high cholesterol, smoking, chronic kidney disease, and a congenital valve abnormality, all of which are associated with a higher likelihood of developing calcific aortic valve disease.¹

Complications

Without treatment, aortic stenosis can lead to heart failure, as the heart muscle struggles to keep up with the demands of pumping blood through an increasingly narrow valve. Severe aortic stenosis is also associated with an increased risk of fainting spells, abnormal heart rhythms, and sudden cardiac events, particularly once symptoms have developed.²

Treatment

No medication currently available can reverse or halt the progression of aortic stenosis, so treatment for significant disease is centered on valve replacement rather than medical therapy alone.¹
Surgical aortic valve replacement, performed through open heart surgery, has traditionally been the standard treatment, particularly for younger, lower risk patients. Transcatheter aortic valve replacement, commonly known as TAVR, is a minimally invasive alternative in which a new valve is guided into place through a catheter rather than open surgery, and it has become an increasingly common option, including for patients previously considered too high risk for open surgery.^3,4

Prevention

While age related valve calcification cannot be entirely prevented, managing cardiovascular risk factors such as high blood pressure, high cholesterol, and smoking may help reduce the pace of valve deterioration in some patients. Regular monitoring with echocardiography is important for anyone diagnosed with mild or moderate aortic stenosis, since early detection of disease progression allows treatment to be planned before serious symptoms develop.²

Why visual communication matters for aortic stenosis?

Patients are often surprised to learn how long aortic stenosis can progress silently, or to understand exactly how a calcified valve restricts blood flow and strains the heart over time.
Medical illustrations and animations can show the valve narrowing process step by step, compare a healthy valve with a stenotic one, and walk patients through the difference between open surgical and transcatheter valve replacement in a way that supports clearer, more confident treatment decisions.³
Visual communication can support:

Heart valve anatomy and calcification process education
Comparison of surgical and transcatheter valve replacement
Disease progression and symptom timeline visualization
Echocardiography and diagnostic imaging education
Patient informed consent resources
Healthcare professional training
Clinical trial and research communication

How Biotic Artlab supports aortic stenosis communication

At Biotic Artlab, we transform complex cardiac anatomy, procedures, and scientific information into clear, accurate medical illustrations and animations.
We collaborate with healthcare organizations, medical device developers, researchers, and publishers to create educational content that supports patient education, clinician training, and scientific communication.
Whether you’re explaining how a valve becomes stenotic, demonstrating a transcatheter valve replacement, or presenting clinical trial findings, we create scientifically accurate illustrations and animations that improve understanding without oversimplifying the science.
Our services include:

Medical illustration
3D medical animation
Scientific illustration
Interactive medical education
Scientific figures for publications
Conference and presentation graphics
Medical device visualization

Frequently Asked Questions

What causes aortic stenosis?

The most common cause is calcific aortic valve disease, a gradual process of inflammation and calcium buildup on the valve leaflets. Less commonly, it results from a congenital valve abnormality or rheumatic fever related damage.¹

What are the warning signs of aortic stenosis?

Common symptoms include chest pain, shortness of breath, dizziness, and fainting, particularly during physical activity. Many people have no symptoms in the earlier stages of the disease.²

Can aortic stenosis be treated with medication?

No medication currently available can stop or reverse the progression of aortic stenosis. Treatment for significant disease relies on valve replacement, either surgically or through a transcatheter procedure.¹

What is TAVR?

TAVR, or transcatheter aortic valve replacement, is a minimally invasive procedure that replaces a diseased aortic valve using a catheter based approach rather than open heart surgery, generally allowing for a shorter recovery time.^3,4

Is aortic stenosis dangerous if left untreated?

Yes, untreated severe aortic stenosis can lead to heart failure and carries an increased risk of serious complications, particularly once symptoms have developed.²

How is aortic stenosis diagnosed and monitored?

Aortic stenosis is typically diagnosed and monitored using echocardiography, which allows clinicians to measure the severity of the narrowing and track changes over time.²

Have a Project in Mind? Contact Us.

Medical information becomes more effective when people can see what’s happening. We help healthcare organizations and medical device teams communicate complex science through accurate, engaging visual content.
Contact us at info@biotic-artlab.com or get in touch through our contact form to discuss your next project.

References

National Center for Biotechnology Information. Aortic Valve Stenosis: Progress from Diagnosis to Treatment.
Cleveland Clinic. Aortic Stenosis: Symptoms & Treatment.
National Heart, Lung, and Blood Institute. Transcatheter Aortic Valve Replacement (TAVR).
National Center for Biotechnology Information. Beyond Adding Years to Life: Health Related Quality of Life and Functional Outcomes in Patients with Severe Aortic Valve Stenosis at High Surgical Risk Undergoing Transcatheter Aortic Valve Replacement.

Disclaimer: This page provides general educational information and is not a substitute for diagnosis, treatment, or individualized advice from a qualified healthcare professional.