What is aortic stenosis?

The heart’s aortic valve has three thin flaps, which open and close to allow blood flow from the heart to the entire body.1

With aortic stenosis, this valve does not function properly.1

Sometimes the leaflets of the aortic valve become stiff, which causes a narrowing of the aortic valve opening. This means the valve cannot fully open and close like it should. As the opening becomes smaller, it makes it harder for the heart to pump blood, which can affect your health2

Insufficient blood reaching the body causes breathlessness, fatigue and dizziness, among other symptoms.


* Slide to the left to see the difference between a normal valve and one with stenosis

How would I know if I might have aortic stenosis?

‘Heart murmur’ is a common sign of aortic stenosis. Your doctor might listen to the sounds of your heart with a stethoscope (auscultation) to detect it.3

A cardiologist can confirm aortic stenosis by doing an echocardiogram.3

Other common symptoms are:3,4

Chest Pain
Shortness of breath
Feeling faint
Weak or dizzy
Chest Pain
Chest Pain
Shortness of breath
Shortness of breath
Feeling faint
Feeling faint
Weak or dizzy
Weak or dizzy
Learn more about aortic stenosis.

Risk Factors

old man

Old age

Thickening of valves due to aging or calcium buildup3



Infections like rheumatic fever, which may thicken the heart valves3,4


Birth defects

Missing or malformed heart valves at birth4


Heart conditions

Heart attack, failure or infection causing heart valve damage3

Talk to your doctor to learn if you are at risk

Can aortic stenosis get worse over time?

Aortic stenosis is a progressive disease and typically occurs in 3 stages. It starts at a mild stage, progresses to moderate and subsequently, severe stages.6

The stage of aortic stenosis depends on how damaged your aortic valve is.







Unless treated, only 1 in 2 people with severe aortic stenosis will survive for 2 years.5

Do not delay getting your heart checked.
Visit your doctor today.

Guide for talking to your doctor Patient stories

1. Mayo Clinic. Bicuspid aortic valve. Available at: https://www.mayoclinic.org/diseases-conditions/bicuspid-aortic-valve/cdc-20385577. Accessed 17 October 2023.
2. Bouma BJ, van den Brink RBA, van der Meulen JHP et al. To operate or not on elderly patients with aortic stenosis: the decision and its consequences. Heart 1999 Aug; 82: 143–8.
3. Centers for Disease Control and Prevention. Valvular Heart Disease. Available at: https://www.cdc.gov/heart... Accessed 17 October 2023.
4. Mayo Clinic. Heart Valve Disease. Available at: https://www.mayoclinic.org/diseases-conditions/heart-valve-disease/symptoms-causes/syc-20353727. Accessed 17 October 2023.
5. American Heart Association. Aortic Stenosis Overview. Available at: https://www.heart.org/en/health-topics/heart-valve-problems-and-disease/heart-valve-problems-and-causes. Accessed 17 October 2023.
6. American Heart Association. Managing Aortic Stenosis Symptoms. https://www.heart.org/en/health-topics/heart-valve-problems-and-disease/heart-valve-disease-risks-signs-and-symptoms/managing-aortic-stenosis-symptoms/. Accessed 17 October 2023.