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What causes pulmonary artery stenosis?

Pulmonary stenosis is the second most common form of congenital heart disease. In pulmonary stenosis, the pulmonary valve is abnormal and does not open to allow blood to flow freely to the lungs. The pulmonary valve is important because it is the gateway between the lower right heart chamber (the right ventricle) and the major artery to the lungs (the pulmonary artery). Pulmonary stenosis, therefore, causes increased pressure on the right side of the heart, and can lead to symptoms and heart failure over time.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.