What is the lung valve?
The pulmonary valve is an opening and closing valve located between the upper part of the right ventricle and the pulmonary artery. Normally functioning valve opens its three CUSPS or leaflets when the contraction of the right ventricle (systole) allows blood from the chamber to the pulmonary artery. This blood then continues its journey from the artery to the lungs where it is oxygenated. Between each heart rhythm, CUSPS remained closed so that blood from the pulmonary artery does not flow back to the right ventricle. All other valves in the heart, such as tricuspid, mitral and aortic, are vital and lung valves do not differ in this respect.
Most people have a normal pulmonary valve, but there are a number of congenital heart diseases that can cause abnormal function and shape of this valve. One of the most common of them is the stenosis of the lung valve, where either directly at the valve or above or below it, the passage is tapered. It can make it difficult to get blood into the lungs leads to a lack of oxygenation for all body tissues.
grade of stenosis dikIt tires how much the body is affected. With an insignificant narrowing of the valve, it can still have enough space for blood passage. Over time, however, the valve could be leaking or cause some blood to be sent to escape back to the heart. In case of severe regurgitation, the right ventricular may expand or begin with real heart failure.
More serious lung flap stenosis can be an immediate problem. If the body is unable to obtain sufficient blood into the lungs, the condition may require emergency treatment and things like the replacement of the valve are considered. Sometimes the condition is even more serious than stenosis present at birth. In the pulmonary atresia, the lung valve is absent or blocked by tissue that does not allow any blood flow. Jaky forms of stenosis, lung atresia usually require immediate treatment after birth. It should be noted that the pulmonary valve defects are often observed in combination with other cardiacEven defects.
Sometimes the disease later affects the function of the valve. This includes bacteria infections that can cause bacterial mass growth in heart valves. Bacterial endocarditis is one of the examples of a disease that can affect the pulmonic valve and which was particularly common before the arrival of antibiotics. If people who had a scarlet fever (strip of the neck) developed a rheumatic fever, the condition damaged the valves over time and shortened the life.
Although this is not a problem for most people, sometimes the valves are so damaged or poorly formed that they require replacement. Aortic valves are often replaced by mechanical valves, but this is not the case of lung valves. Instead, pigs or human homographs are usually used. Unfortunately, these clothes quickly, especially in children, so children with lung valve problems could eventually require valve replacement every five years while growing. Adults requiring valve replacement may still require them to replaceWell every 10-15 years.