Just when you think we don't have enough things to worry about... I was reading the JAAHA journal where primary infundibular pulmonic stenosis was diagnosed in littermates(goldens). It is usually also associated with other heart defects... by pedigree analysis, they believe it is autosomal recessive. In people, they do surgery to correct it... they do not say in the article what the final outcome was for these dogs. They do say they believe it will worsen with age.