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Living with Idiopathic pulmonary artery dilatation

A rare condition from before birth in which the main artery to the lungs is wider than normal.

Understanding Idiopathic pulmonary artery dilatation

Idiopathic pulmonary artery dilatation is a rare condition in which the main pulmonary artery, which carries blood to the lungs, is widened.

It happens during embryo development and isn't caused by another heart, lung, or artery disease. Some people have symptoms and others have none. In severe cases, the windpipe (trachea) may narrow with changes in posture, leading to bluish skin and severe shortness of breath.

Signs & symptoms

Symptoms vary from person to person, and some people have none. GARD lists these:

  • Shortness of breath
  • Tiredness (fatigue)
  • Cough
  • Coughing up blood
  • Heart palpitations
  • Chest pain

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.

Care & treatment

Care team
Heart and blood vessel specialists (cardiologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 rare disease patient organizations for support
  • 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
Do I need regular imaging to watch the artery size?
Which symptoms mean I should get care right away?
Could my posture affect my breathing?

Quick facts

GARD says the condition happens during embryo development and isn't caused by other heart, lung, or artery disease. It doesn't list a gene.

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Idiopathic pulmonary artery dilatationGARD ID 6757 · 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 Idiopathic pulmonary artery dilatation.

Explore the Idiopathic pulmonary artery dilatation blog

Explore research for Idiopathic pulmonary artery dilatation

Explore actively recruiting Idiopathic pulmonary artery dilatation studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Idiopathic pulmonary artery dilatation 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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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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