Skip to content
knowrare
HealthSignal
Your condition community

Living with Coronary sinus atrial septal defect

A rare heart condition present from birth with an opening between the two upper heart chambers.

Understanding Coronary sinus atrial septal defect

Coronary sinus atrial septal defect is a rare heart condition present from birth that causes an opening between the two upper chambers of the heart (the atria).

It can be found during pregnancy, at birth, or in infancy. Symptoms may include tiredness, shortness of breath with activity, a heart murmur, and palpitations.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Tiredness (fatigue)
  • Shortness of breath with exertion
  • Trouble exercising
  • Heart murmur
  • Palpitations
  • Blood flowing from left to right in the heart (shunt)

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 genetic specialists and 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 and Conquering CHD may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Heart and blood vessel specialists (cardiologists)
Expert care
Expert lists: Adult Congenital Heart Association, Conquering CHD
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 and other patient organizations
  • 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 large is the opening, and is it affecting my child's heart?
Is treatment, such as a procedure, recommended?
What follow-up heart tests will we need?

Quick facts

Symptoms usually startduring Pregnancy, at Birth, and as an Infant

GARD says changes in genes cause this condition. It doesn't name a gene.

Genetic

Also known as: asd coronary sinus; asd, coronary sinus type; atrial septal defect coronary sinus; atrial septal defect, coronary sinus type; coronary sinus atrial septal defects; unroofed coronary sinus

Patient organizations

Source: NIH GARD · Coronary sinus atrial septal defectGARD ID 10697 · 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 Coronary sinus atrial septal defect.

Explore the Coronary sinus atrial septal defect blog

Explore research for Coronary sinus atrial septal defect

Explore actively recruiting Coronary sinus atrial septal defect studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Coronary sinus atrial septal defect 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

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Coronary sinus atrial septal defect 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.

Get Signals for Coronary sinus atrial septal defect

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Coronary sinus atrial septal defect

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Coronary sinus atrial septal defect experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.