A Answers (9)
Mehmet Oz, MD, Cardiology, answeredAortic valve stenosis means the valve that opens to let blood flow from the heart to the rest of the body is narrow and doesn’t open all the way. Watch this animation to see how aortic valve stenosis happens.
Johns Hopkins Medicine answered
The aortic valve is located in the heart (between the left ventricle and aorta) and is responsible for allowing blood to flow from the left ventricle into the aorta. The aortic valve contains three leaflets, and should these leaflets become abnormally rigid (a condition known as aortic stenosis) they do not open fully - which causes the valve to narrow, making it harder for blood to move from the heart to the rest of the body.
Aortic stenosis is most commonly caused by calcium buildup on the leaflets of the aortic valve - which tends to occur as people get older. The other cause stems from birth defects during which two leaflets are fused into one - meaning the "tricuspid" aortic valve becomes a "bicuspid" aortic valve.
Aortic valve stenosis is a narrowing of the aortic valve between the lower left chamber of the heart and the aorta, which supplies blood to the body. A narrowed aortic valve forces the lower left chamber of the heart to pump harder to get enough blood through the valve.
Aortic valve stenosis can be caused by a structural problem called bicuspid aortic valve, which develops before a baby is born (congenital heart defect). In these cases, the valve has only two flaps, or leaflets, instead of the normal three.
Aortic valve stenosis also occurs as a person ages and the valve becomes hard and thick from calcium buildup. Most cases of aortic valve stenosis caused by calcium buildup occur in people who are older than 65.
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Anthony Komaroff, MD, Internal Medicine, answeredAortic stenosis refers to a narrowing of the aortic valve. This valve acts like a one-way gate between the heart's main pumping chamber, the left ventricle, and the aorta, the main pipeline through which oxygenated blood is distributed to the body. In some people, calcium accumulates in the valve, gradually thickening and stiffening the leaflets, the working part of the valve. This narrows the opening through which blood can pass. A murmur indicates turbulent blood flow from the force needed to push blood through the narrowed aortic valve or from blood flowing backward through a valve that can't close completely.
Aortic stenosis can lead to symptoms such as fatigue, chest pain, dizziness, and breathlessness.
This common condition does not correct itself. There is no evidence that any medicines or lifestyle modifications affect the progression of aortic stenosis. Some preliminary studies raised the possibility that cholesterol-lowering statins might prevent it from getting worse, but later work has pretty much dashed that possibility.
That said, mild aortic stenosis should not affect your life and should not hold you back from exercise or other daily activities. Your doctor may limit your peak activity level as the condition progresses, but that shouldn't stop you from walking or swimming or other moderate-intensity activities.
In most people with aortic stenosis, the valve opening shrinks at a steady rate. Doppler echocardiography is outstanding for following this change, so it is rare for aortic stenosis to cause severe harm before it becomes apparent an operation is needed to replace the valve.
Riverside Heart and Vascular Center answered
Aortic valve stenosis is also called aortic stenosis or AS. It is a disease of the aortic valve in the heart. Valves act as doors between the heart chambers. They open and close to direct blood flow through the heart. The aortic valve lies between the left ventricle (lower chamber) and the aorta.
The aorta is a blood vessel that supplies blood to your head and your body, including the heart muscles. The aortic valve is made up of three cusps (flaps) attached to the aortic ring. The cusps come from the sides and top of the valve and meet in the middle. As the heart beats, the aortic valve opens to let blood flow into the aorta. When the heart rests between beats, the aortic valve should close to keep blood from flowing back.
Aortic stenosis happens when the cusps get thick and stiff. Stenosis means the valve opening gets smaller. When you have aortic stenosis, your heart works harder to push blood through the thick, stiff aortic cusps. Over time, the cusps cannot open wide enough to allow adequate blood to flow from your heart into your aorta.
Picture of a heart with aortic stenosis
Aortic stenosis is a narrowing of the aortic valve opening. The aortic valve separates the left ventricle from the aorta, and normally has three leaflets, which open and close as the ventricle contracts. The narrowed passageway makes it difficult for blood to be pumped out of the left ventricle to the rest of the body. This puts added stress on the heart muscle and it begins to thicken. Eventually, this additional work can weaken the heart and cause symptoms to develop.
Aortic valve stenosis is when the valve leaflets between the heart and aorta (the main artery leading away from the heart) have narrowed and do not permit enough blood to exit the heart and travel to the rest of the body. A valve can narrow because the flaps have grown thick or stiff or have grown together.
Your physician may prescribe several types of medication to help treat the symptoms of aortic valve stenosis. Possible medications include diuretics to reduce fluid retention in the body, anticoagulants or “blood-thinners” to discourage blood clots, and medications to control the heart’s rhythm.
If your aortic valve is seriously narrowed, your physician may recommend surgery or a procedure called valvuloplasty to stretch the valve open. Surgery for aortic valve stenosis consists of valve replacement either with a mechanical valve or a tissue valve from a human, pig or cow. If valvuloplasty is indicated, a cardiologist will thread a tube called a catheter through a vein in the groin, and through your artery to the site of the valve. A small balloon attached to the catheter will open and close, stretching the valve and improving blood flow.
The most common heart valve condition is aortic stenosis. The aortic valve is the last valve blood passes through before it goes to your arms and legs and brain and everywhere else in your body. In some patients, that valve starts to narrow. Instead of being as round as a silver dollar it is like a dime, which limits the flow of blood.
When patients with aortic stenosis are active, their heart is pumping hard, but it is pumping against an obstruction or partial obstruction. The condition is more common in elderly patients.
When the heart pumps, blood exits the heart and is pumped into a large blood vessel (called the aorta). The aortic valve acts as a one-way gate, allowing blood to exit the heart to go into the aorta and then to the rest of the body. Aortic stenosis refers to the narrowing of this valve, restricting the valve’s ability to open and allow normal blood flow. When this valve has narrowed to a certain extent, it is referred to as severe aortic stenosis.