In pulmonary stenosis, the pulmonary valve is narrowed. The greater the narrowing, the harder the lower right heart chamber, called the right ventricle, must work to pump blood to the lungs. The increased pressure causes the right ventricle to become thick.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press.
Your gift can go twice as far to advance cancer research and care!