Marfan syndrome

Marfan syndrome is an inherited condition that affects the body's connective tissue, which holds the body together and supports organs. It mainly affects the heart and main blood vessel (aorta), the eyes, and the bones and joints. People with it are often tall and thin with long arms, legs and fingers.

Last updated Nov 9, 2026

What it is

The most serious risk is widening of the aorta, which can tear. Regular heart scans and medicines to lower blood pressure reduce this risk, and surgery may be needed.

Care usually involves a team including cardiology, eye and genetics specialists.

Common signs

  • Being tall and thin with long limbs and fingers
  • A chest that sinks in or sticks out
  • A curved spine
  • Short-sightedness or a dislocated lens
  • Flexible joints

How it is usually diagnosed

  • Examination
  • Echocardiogram
  • Eye examination
  • Genetic testing

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Echocardiogram reports with aortic measurements over time
  • Genetic test results
  • Eye clinic letters
  • Cardiology letters

Questions to ask your doctor

  • How wide is my aorta and how often should it be scanned?
  • Which activities should I avoid?
  • Should my family be tested?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden severe pain in the chest, back or tummy, or sudden loss of vision: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources