17001 Fibromuscular Dysplasia Fmd

Overview

Fibromuscular dysplasia (FMD) is a rare condition that affects the walls of some arteries. Arteries are the blood vessels that carry oxygen-rich blood from your heart to the rest of your body. In FMD, cells in the artery walls grow in an unusual way, which can make the artery become too narrow, bulge, or tear. This can reduce blood flow to organs such as the kidneys, brain, or abdomen.

No, FMD is rare. However, specialists think it may be underdiagnosed because many people have no symptoms. Some estimates suggest it may affect about 4 in 100 people, but most don't know they have it.

FMD most commonly occurs in women between the ages of 30 and 60, but it can happen in men, and it can also affect children and older adults.

Symptoms

Common symptoms

• High blood pressure (hypertension), especially in a younger person
• Headaches that feel like migraines
• Dizziness or lightheadedness
• Pulsatile tinnitus - a whooshing sound in the ear that matches your heartbeat
• No symptoms at all - FMD may be found by accident during an imaging test for another reason

Symptoms in children

• High blood pressure with no clear cause
• Headaches or blurred vision
• Poor growth or appearing less energetic than expected
• Abdominal pain if arteries to the digestive system are affected

Symptoms in older adults

• Often no symptoms at all
• Discovering high blood pressure that is difficult to control
• A pulsatile abdominal mass (when a bulging artery in the belly is felt during a physical exam)
• Fatigue or a general feeling of being unwell

Causes

Main causes

• The exact cause of FMD is not fully understood
• It is not caused by diet, stress, or hardening of the arteries
• There may be a genetic (inherited) factor, because FMD sometimes runs in families
• Hormones may play a role, since it appears more often in women

Risk factors

• Being female
• Being between 30 and 60 years old
• Having a family member with FMD or a related artery condition
• Smoking or past smoking may raise the risk
• Having certain connective tissue disorders or a history of blood vessel problems

When to see a doctor

See a doctor urgently if:

• If you have sudden weakness, face drooping, trouble speaking, or severe headache, call your local emergency number immediately.
• If you have chest pain or sudden severe abdomen or back pain, seek urgent medical care.

Book a routine appointment if:

• If you have persistent high blood pressure, especially if you are under 40 or have no family history of high blood pressure.
• If you have frequent headaches or a constant whooshing sound in one ear.
• If you have been told you have a bulging artery (aneurysm) or a blocked kidney artery.

Diagnosis

To diagnose FMD, a doctor takes a detailed medical history and does a physical exam. They may listen to the arteries in your neck, belly, or kidneys with a stethoscope. The most reliable way to confirm FMD is with imaging tests that look at the blood vessels in detail.

Tests that may be done

• Doppler ultrasound – uses sound waves to see how blood flows in arteries
• Computed tomography angiography (CTA) – a special X-ray with dye that creates detailed pictures of blood vessels
• Magnetic resonance angiography (MRA) – uses a magnetic field and radio waves to show blood vessels
• Catheter angiography – a thin tube is inserted into a blood vessel and dye is injected so X-rays can show the artery from the inside

What to expect at your appointment

If your doctor suspects FMD, they will likely refer you to a specialist (such as a vascular specialist or a kidney doctor). The tests are usually done as an outpatient. You will be given instructions about what to eat or drink before the test. The procedure is generally painless, though you may feel a slight sting if dye is injected.

Treatment

Treatment for FMD focuses on controlling blood pressure and reducing the risk of complications. There is no cure, but the condition can often be managed well. Your healthcare team will tailor the plan to your specific situation, based on which arteries are affected and your symptoms.

Self-care at home

• Take any prescribed medicines exactly as directed, even if you feel well
• Check your blood pressure regularly at home and keep a record
• Avoid smoking and exposure to secondhand smoke
• Attend all follow-up appointments and imaging tests as scheduled
• Tell your doctor about any new symptoms right away

Medical treatments

Doctors usually recommend medicines to lower blood pressure and sometimes medicines to prevent blood clots or to help blood vessels relax. The exact treatment depends on your age, other health conditions, and which arteries are involved. Never change or stop your medicines without talking to your doctor.

When is surgery considered?

Most people with FMD do not need surgery. However, if a kidney artery is very narrowed, doctors may recommend a procedure called angioplasty (opening the artery with a small balloon) or placing a small tube called a stent to keep the artery open. Surgery is used only when an aneurysm (a bulging artery) has a high risk of tearing, or when other treatments haven't worked.

Living with this condition

Living with FMD usually means managing blood pressure and staying alert to new symptoms. Many people feel healthy and have no restrictions. It helps to learn about your condition and work as a team with your healthcare providers.

Lifestyle tips

• Maintain a healthy weight; even small changes can help blood pressure
• Reduce stress with activities like gentle yoga, meditation, or hobbies
• Limit salt in your meals to help control blood pressure
• Stay active with moderate exercise, like walking or swimming, on most days
• Avoid smoking entirely – it is one of the most important steps for your blood vessels

Diet and exercise

A heart-healthy diet is also a blood-vessel-healthy diet. This means plenty of fruits, vegetables, whole grains, lean proteins, and low-fat dairy. Try to limit processed foods and food with added salt. Exercise such as walking, cycling, or swimming for 30 minutes a day, most days, is generally safe, but always ask your healthcare team before starting a new routine.

Mental health and emotional wellbeing

Living with any long-term condition can cause worry or anxiety. You might feel stressed about your blood pressure numbers or the risk of future problems. These feelings are normal. It helps to talk openly with your doctor or nurse. If you feel overwhelmed, tell your GP – they can talk you through options like counselling or support groups.

Prevention

There is no known way to prevent FMD, because the cause is not fully understood. However, you can lower your chance of complications by managing blood pressure, not smoking, and following your healthcare team's advice.

Screening programmes

If a close family member has FMD, tell your doctor. They may suggest checking your blood pressure regularly or doing an imaging test to detect FMD early, even before symptoms appear.

Complications

If left untreated

• Uncontrolled high blood pressure that can damage organs like the kidneys, heart, and brain
• Stroke or a transient ischaemic attack (a temporary lack of blood flow to the brain)
• An aneurysm (a widening of the artery) that may tear or burst, which is an emergency
• Kidney damage or kidney failure if blood flow to the kidney is severely reduced

Long-term outlook

With regular monitoring and proper care, most people with FMD have a good outlook. Treatments are very effective at controlling blood pressure and preventing complications. Life expectancy is usually normal. Many people with FMD live without major problems for many years, and simply need to keep an eye on their health.

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