What is the heart valve?
heart valve is a passage in the heart, a functional point of connection between one heart area and the other. The valves have an important task of opening and closing so that the blood moves along the circulatory. These connection points are divided into two categories called atrioventricular and Semilunar. Atrioventricular valves form a passage between atrial and chambers, while the semilunar valves are attached to the peaks of the chambers and check the blood flow that enters the pulmonary artery and aorta.
Two atrioventricular valves have a clear name. Between the right atrium and the right chamber lies the tricuspid valve and the mitral valve is located between the left atrium and the left ventricle. The term tricuspid is descriptive for the right valve because it has three CUSPS or leaflets that open and close when the heart beats. The mitral valve is different because it has only two leaflets or CUSPS, but the strongness in a healthy heart is a tight seal when the valve is closed.
Atrioventricular heart valve hasa specific “operating system”. The valve is connected to small tendons (Akordae TENDEAE), which attach to the muscles called papillary muscles. These muscles are withdrawing and pulling "heart strings", thus closing the valve leaflets, which also prevents leaflets from overrun due to blood pressure. In the relaxed state, the leaflets naturally open and the blood flows from the hall to the chamber.
Semilunar valves have three CUSPY and are connected to the right and left chamber. They work in a somewhat different way than atrioventricular heart valves. How lung valves, connected to the right chamber and aortic heart valve, connected to the left, change of meaning in the pressure between the chamber and the large container to WHICH, which draws blood. For example, the aortic heart valve opens as soon as the left chamber has higher pressure than aorta. Similarly, lung valves open to pass blood as the right ventricular pressure exceeds the pressure in the pulmonary artery.
cardiac healthIt depends on every functioning of the heart valve normally and there may be many problems in these valves that may require treatment or correction. Some congenital heart defects result in absent, stenotic (narrow) or insufficient valves. About 8 out of 1000 people have a congenital heart defect and many affect at least one heart valve. In addition, it has about 1% of the bicuspid aortic valve population, which can lead to regurgitation where blood flows back from the aorta to the left ventricle. Problems with mitral valve or tricuspide can exist or may develop later in life. Aging or sometimes bacterial infections also affect the function of the valve.
Fortunately, there is a redvojice for defective or damaged heart valves. Sometimes the valve is directly repaired and sometimes replaced. Common replacing strategies use beef, pig, donor or mechanical valves. These replacement have good results, although tissue valves may require re -conversion.