Long-term outcome of patients undergoing surgical repair of isolated pulmonary valve stenosis. Follow-up at 20-30 years.

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Abstract
In a group of 191 consecutive patients who underwent operation at the Mayo Clinic for isolated pulmonary valve stenosis between 1956 and 1967, late results were excellent. In patients surviving operation before the age of 21 years, long-term survival was similar to that in an age- and sex-matched control population. In the other patients, late survival and functional status were good, but survival was poorer than in the control population. This late attrition, most likely due to the sequelae of long-standing right ventricular hypertrophy, suggests the need for continued surveillance. Late sudden death occurred in only three patients, between 10 and 21 years postoperatively. The finding of normal life expectancy for such patients who survive operation before age 21 is important for actuarial purposes and for the patients' career and employment plans.

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