Draft — awaiting clinical review

Marfan Syndrome

In plain words: A connective tissue condition that can affect the heart's main artery, eyes and skeleton. Regular heart monitoring is key.

Your genetics may influence your health, but they do not determine your worth. Understanding your body creates opportunities for informed care—not blame.

Designed to Heal provides general educational information and personal wellness tools. It does not diagnose genetic conditions, interpret genetic tests, or replace qualified medical care. Genetic disorders may require specialized diets, medication, monitoring, or other medical treatments. Consult a qualified healthcare professional before changing your treatment, nutrition, or exercise plan.

Emergency? Call 911 (U.S.) or your local emergency number. For a mental health crisis, call or text 988. Emergency Help

We do not diagnose, interpret genetic tests or calculate risk. For testing or family-planning questions, ask your clinician about a certified genetic counselor.

1. Overview

Marfan syndrome affects connective tissue, which supports the body's organs. The most serious concern is enlargement of the aorta (the main artery from the heart), which can tear or rupture.

2. Genetic cause and inheritance

Caused by changes in the FBN1 gene. It is autosomal dominant — one changed copy is enough. About a quarter of cases are new changes, with no family history.

3. Symptoms and complications

Tall, slender build with long arms, legs and fingers
Lens dislocation or severe nearsightedness
Aortic enlargement, heart valve problems
Curved spine, chest shape differences, flexible joints

4. How clinicians diagnose it

Clinicians use a physical exam, family history, heart imaging (echocardiogram), an eye exam and often genetic testing.

5. Established medical treatment

Regular heart imaging
Blood-pressure-lowering medications your cardiologist may prescribe to reduce strain on the aorta
Surgery to repair the aorta when needed
Eye and orthopedic care

6. Nutrition considerations

There is no special Marfan diet. Ask your care team about heart-healthy eating and any needs after surgery.

Nutrition, movement and other supportive practices may support overall health, but they cannot change the inherited genetic variant.

7. Activity considerations

Gentle to moderate aerobic activity is often encouraged, but certain strenuous or contact activities may be contraindicated. Heavy lifting, straining, contact sports and competitive or intense sports may raise risk — get personal clearance from your cardiologist.

8. Safety precautions

Sudden severe chest, back or belly pain may mean an aortic tear — call 911
Avoid heavy lifting and breath-holding while straining unless cleared
Ask before taking certain medications (for example, some antibiotics and decongestants)
Plan pregnancy with a cardiologist — risks to the aorta can increase

9. Questions to ask your clinician

How often should my aorta be imaged?
Which activities are safe for me specifically?
Should my relatives be evaluated?

10. References

Last updated October 8, 2026