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abnormal narrowing of the opening into the pulmonary artery from the right ventricle
A narrowing of the pulmonary valve.
partial or full blockage of the pulmonary artery or valve
a narrowing between the right ventricle and the lung artery
Pulmonary valvular stenosis; narrowing of the normal area of the pulmonary valve causing a pressure drop across the valve during left ventricular systole
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