Aortic stenosis Health Article

Definition

Aortic stenosis is the narrowing or obstruction of the heart's aortic valve, which prevents it from opening properly and blocks the flow of blood from the left lower chamber of the heart to the aorta. The aorta is the main artery leaving the heart.

Alternative Names

Aortic valve stenosis; Left ventricular outflow tract obstruction

Causes, incidence, and risk factors

As the aortic valve becomes more narrow, the pressure increases inside the left heart ventricle. This causes the left heart ventricle to become thicker, which decreases blood flow and can lead to chest pain. As the pressure continues to increase, blood may back up into the lungs, and you may feel short of breath. Severe forms of aortic stenosis prevent enough blood from reaching the brain and rest of the body. Lightheadedness and fainting can result.

Aortic stenosis may be present from birth (congenital), or it may develop later in life (acquired). Children may have other congenital conditions.

Aortic stenosis is caused by many disorders. One common cause in adults is rheumatic fever, a complication of untreated strep throat. Calcification of the valve can also cause this condition. In this case, the condition is usually not seen until a person reaches their 70s.

Aortic stenosis is not very common. It occurs more often in men than in women.

Symptoms

• Breathlessness with activity
• Chest pain, angina-type
  • Under the chest bone, may move to other areas
  • crushing, squeezing, pressure, tightness
  • Pain increases with exercise, relieved with rest
• Fainting, weakness, or dizziness with activity
• Sensation of feeling the heart beat (palpitations)

Children born with aortic stenosis may show symptoms of shock, poor feeding, failure to thrive, and shortness of breath.

Note: People with aortic stenosis may not have any symptoms until later in the course of the disease.