pulmonary stenosis, an abnormal cardiac condition generally characterized by concentric hypertrophy of the right ventricle with relatively little increase in diastolic volume. When the ventricular septum is intact, this condition may be caused by valvular stenosis, infundibular stenosis, or both; it produces a pressure difference during systole between the right ventricular cavity and the pulmonary artery. Pulmonary stenosis is most often congenital but also may be produced after birth by any of a number of types of lesions. Severe pulmonary stenosis may result in heart failure and death, but mild to moderate forms of this disorder are relatively well tolerated. Also called pulmonic stenosis. See also congenital cardiac anomaly, valvular heart disease, valvular stenosis.
