The<unk>  valve separates left atrium and left ventricle in the heart.<unk>  refers to a condition in which the valve does not open fully, restricting blood flow. As a result, less blood flows to the body. The upper heart chamber swells as pressure builds up. Blood may flow back into the lungs. Fluid then collects in the lung tissue (pulmonary edema), making it hard to breathe.  The cause of<unk>  are often rheumatic fever in adults. Among children, congenital or other birth defects are the main causes. Usual symptoms of<unk>  are fatigue, especially during times of increased activity, shortness of breath, especially with exertion or when you lie down, swollen feet or ankles, palpitations, frequent respiratory infections and heavy coughing. Echocardiogram and transesophageal echocardiogram (TEE) can tell the structure of the<unk>  valve and measure the<unk>  area. Treatments include medication, percutaneous<unk>  balloon valvotomy, valvuloplasty and<unk>  valve replacement. The prognosis of<unk>  varies widely. It mainly depends on the severity of<unk>  and heart function.
Mitral stenosis
Aortic regurgitation
Mitral regurgitation
Tricuspid stenosis
Tricuspid regurgitation
Aortic stenosis
Pulmonary valve stenosis
Pulmonic regurgitation