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Pulmonary stenosis

The pulmonary valve is too tight so that the flow of blood from the right ventricle of the heart into the pulmonary artery is impeded. This means the right ventricle must pump harder than normal to overcome the obstruction. If the stenosis is severe, babies may become blue (cyanotic). Older children often have no symptoms. Treatment is needed if the pressure in the right ventricle is higher than normal. The obstruction can usually be relieved by a procedure called balloon valvuloplasty or by open heart surgery during which the stenotic valve is opened. The outlook after either procedure is favorable.

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pulmonary stenosis n abnormal narrowing of the orifice between the pulmonary artery and the right ventricle called also pulmonic stenosis

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congenital narrowing of the outlet of the right ventricle of the heart to the pulmonary artery. The defect may be in the pulmonary valve (valvular stenosis) or in the outflow tract of the right ventricle below the valve (infundibular stenosis). It may be isolated or combined with other heart defects (e.g. tetralogy of Fallot). Severe pulmonary stenosis may produce angina pectoris, faintness, and heart failure. The defect is corrected by surgery.

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(PS) narrowing of the opening between the pulmonary artery and the right ventricle, usually at the level of the valve leaflets.

Medical dictionary. 2011.