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Living with Cardiac diverticulum

A very rare heart difference present from birth, with symptoms ranging from none to serious.

Understanding Cardiac diverticulum

Congenital cardiac diverticulum is a very rare heart malformation in which a muscular pouch grows out from the heart.

The pouch usually comes from the tip of the left lower chamber (left ventricle). Less often it comes from the right chamber or from both. Effects range from no symptoms to serious problems with blood flow. It starts in the newborn and infant years.

Signs & symptoms

GARD doesn't list common symptoms for this condition. Its summary says effects range widely. Less common features listed include:

  • Abnormal heart rate
  • Abnormal shape of the aorta
  • Abnormal origin of a coronary artery
  • Abdominal wall defect
  • Abnormality of the diaphragm

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
Where is the pouch, and does it need treatment?
How often should my heart be checked?
Are other organs affected, such as the diaphragm?

Quick facts

Symptoms usually startNewborn and as an Infant

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

Also known as: cardiac diverticulum (disease); congenital cardiac diverticulum; ventricular diverticulum

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Cardiac diverticulumGARD ID 1094 · 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 diverticulum.

Explore the Cardiac diverticulum blog

Explore research for Cardiac diverticulum

Explore actively recruiting Cardiac diverticulum studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Cardiac diverticulum 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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