What is the correct order of valves?

What conditions and disorders can affect the heart valves?

If a heart valve doesn&#;t work correctly, your heart might have to work harder to pump blood.

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Heart valve problems can be related to:

• Changes to your body as you age.
• Congenital heart disease, birth defects in valve structure (for example, missing leaflets or leaflets with the wrong size or shape).
• Infections.
• Underlying conditions, such as diabetes or another heart problem.

There are three main types of heart valve problems. Each type of problem can happen in any of the four valves:

• Regurgitation: Regurgitation is the backward flow of blood because a valve doesn&#;t close properly. Another name for regurgitation is leaking heart valve. One specific type of regurgitation is prolapse. Prolapse involves a leaflet flopping or bulging backward. It tends to occur in the mitral valve.
• Stenosis: Stenosis occurs when a valve&#;s leaflets get thick or stiff or stick together.
• Atresia: Atresia means that a valve is missing.

What are the symptoms of heart valve problems?

Some people can have a heart valve condition but not have any symptoms at all. Heart valve conditions tend to get worse over time, so symptoms may appear as a person gets older.

The sound of your heartbeat is the sound of your heart valves opening and closing. The first sign of a heart valve problem is often a heart murmur (an unusual sound when your heart beats). However, a heart murmur can happen even when there are no valve problems. This is called an innocent heart murmur.

Other signs and symptoms of a heart valve problem may include:

• Chest pain.
• Dizziness.
• Fainting.
• Fatigue (feeling extremely tired).
• Feeling of fluttering or racing in your chest.
• Shortness of breath, especially when exercising or lying down.
• Swelling in the ankles, feet, legs or belly.

What are heart valves?

The heart consists of four chambers, two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving each chamber of the heart. The valves prevent the backward flow of blood. These valves are actual flaps that are located on each end of the two ventricles (lower chambers of the heart). They act as one-way inlets of blood on one side of a ventricle and one-way outlets of blood on the other side of a ventricle. Normal valves have three flaps, except the mitral valve, which has two flaps. The four heart valves include the following:

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• tricuspid valve: located between the right atrium and the right ventricle
• pulmonary valve: located between the right ventricle and the pulmonary artery
• mitral valve: located between the left atrium and the left ventricle
• aortic valve: located between the left ventricle and the aorta

How do the heart valves function?

As the heart muscle contracts and relaxes, the valves open and shut, letting blood flow into the ventricles and atria at alternate times. The following is a step-by-step illustration of how the valves function normally in the left ventricle:

After the left ventricle contracts, the aortic valve closes and the mitral valve opens, to allow blood to flow from the left atrium into the left ventricle.

As the left atrium contracts, more blood flows into the left ventricle.

When the left ventricle contracts, the mitral valve closes and the aortic valve opens, so blood flows into the aorta.

What is heart valve disease?

Heart valves can have one of two malfunctions:

1. regurgitation (or leakage of the valve): The valve(s) does not close completely, causing the blood to flow backward through the valve. This results in leakage of blood back back into the atria from the ventricles (in the case of the mitral and tricuspid valves) or leakage of blood back into the ventricles (in the case of the aortic and pulmonary valves).
2. stenosis (or narrowing of the valve): The valve(s) opening becomes narrowed or valves become damaged or scarred (stiff), inhibiting the flow of blood out of the ventricles or atria. The heart is forced to pump blood with increased force in order to move blood through the narrowed or stiff (stenotic) valve(s).

Heart valves can have both malfunctions at the same time (regurgitation and stenosis). Also, more than one heart valve can be affected at the same time. When heart valves fail to open and close properly, the implications for the heart can be serious, possibly hampering the heart's ability to pump blood adequately through the body. Heart valve problems are one cause of heart failure.

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