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Living with Subpulmonary stenosis

A rare heart difference present at birth in which blood flow to the lungs is blocked just below the pulmonary valve.

Understanding Subpulmonary stenosis

Subpulmonary stenosis is a rare heart difference present at birth in which something blocks blood flow through the pulmonary valve area.

The blockage is just below the pulmonary valve. Signs vary a lot. Some babies have critical narrowing in the newborn period, and others have mild narrowing and no symptoms.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet.

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include heart and blood vessel specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Adult Congenital Heart Association may keep lists of experts for this condition.

Care & treatment

Care team
Heart and blood vessel specialists (cardiologists)
Expert care
Expert lists: Adult Congenital Heart Association
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Adult Congenital Heart Association
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How severe is the narrowing in my child's heart?
How often will heart checks be needed?
Will my child need a procedure, and when?

Quick facts

GARD doesn't describe a cause for this condition yet.

Also known as: infundibular pulmonary stenosis; infundibular pulmonic stenosis; subvalvar pulmonary stenosis; subvalvar pulmonic stenosis; subvalvular pulmonary stenosis; subvalvular pulmonic stenosis

Patient organizations

Source: NIH GARD · Subpulmonary stenosisGARD ID 5051 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Subpulmonary stenosis.

Explore the Subpulmonary stenosis blog

Explore research for Subpulmonary stenosis

Explore actively recruiting Subpulmonary stenosis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Subpulmonary stenosis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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I can help you find recruiting Subpulmonary stenosis studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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