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Living with Cardiac anomalies-heterotaxy syndrome

A condition that affects the heart's structure and how organs are arranged, beginning before or at birth.

Understanding Cardiac anomalies-heterotaxy syndrome

Cardiac anomalies-heterotaxy syndrome is a genetic condition with several heart differences and changes in how the body's organs are arranged side to side.

It involves non-compaction of the heart's lower chambers, a slow heartbeat (bradycardia), a narrowed pulmonary valve (pulmonary valve stenosis), and a hole between the upper heart chambers (secundum atrial septal defect). It begins during pregnancy, at birth, or in infancy.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary describes these features:

  • Non-compaction of the heart's lower chamber muscle
  • Slow heartbeat (bradycardia)
  • Narrowed pulmonary valve
  • Hole between the upper heart chambers

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.

Care & treatment

Care team
Genetic specialists (geneticists); 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
Which heart tests does my child need?
Are other organs affected by the way they are arranged?
Could genetic counseling help our family?

Quick facts

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

GARD says this condition is inherited in an autosomal dominant way, so one changed copy of a gene can cause it. A link to chromosome 6 has been reported.

Genetic

Also known as: cardiac anomaly and heterotaxy syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Cardiac anomalies-heterotaxy syndromeGARD ID 19883 · 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 Cardiac anomalies-heterotaxy syndrome.

Explore the Cardiac anomalies-heterotaxy syndrome blog

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Explore actively recruiting Cardiac anomalies-heterotaxy syndrome studies with HealthSpark.

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