About Fibromuscular Dysplasia

Overview

Fibromuscular dysplasia (FMD) is a vascular condition characterized by the abnormal growth of cells in the walls of arteries. This abnormal growth can lead to narrowing or bulging of the affected arteries, particularly in the carotid arteries (which supply blood to the brain), as well as arteries within the brain and kidneys. FMD can cause a variety of symptoms, including high blood pressure, dizziness or vertigo, chronic headache, intracranial aneurysm, ringing in the ears, weakness or numbness in the face, neck pain, and vision problems. FMD is most commonly seen in individuals between 25 and 50 years of age and affects women more often than men. The cause of FMD is still unknown. Diagnosis is typically made through imaging studies such as angiography. Treatment options for FMD depend on the severity and location of the condition and may include medication or surgical interventions.

Causes and Risk Factors

Fibromuscular dysplasia (FMD) is a condition characterized by abnormal cell growth in the walls of arteries, leading to narrowing, bulges, and tears in the affected arteries. The exact cause of FMD is unknown. However, there are certain factors that may contribute to its development:

Risk factors of FMD:

• Genetics:An association between FMD and a variant of the gene PHACTR1 has been demonstrated. Variants in the PTGIR gene may also play a role in the development of FMD.
• Gender: FMD is more commonly seen in women than in men.
• Age: FMD is most frequently observed in individuals between 25 and 50 years old.

It's important to note that while these risk factors may contribute to the development of FMD, they do not guarantee that an individual will develop the condition. If you have concerns about your risk for FMD or any other medical condition, it's best to consult with your healthcare professional for personalized advice.

Symptoms

The symptoms of fibromuscular dysplasia (FMD) can vary depending on the affected blood vessels and the severity of the disease. Here are the most common symptoms of FMD:

• High blood pressure (hypertension): This is often the first noticeable symptom of FMD. It can occur due to narrowing or blockage of the affected arteries, leading to increased resistance to blood flow.
• Headaches: Some people with FMD may experience recurring headaches, which can be mild to severe.
• Dizziness or light headedness: Reduced blood flow to the brain can cause feelings of dizziness or light headedness.
• Tinnitus: This refers to a ringing or buzzing sound in the ears, which can be caused by reduced blood flow to the ear.
• Blurred vision or vision changes: FMD affecting the arteries supplying blood to the eyes can lead to visual disturbances.
• Chest pain or discomfort: In rare cases, FMD can affect the arteries supplying blood to the heart, causing chest pain or discomfort.

It's important to note that not everyone with FMD will experience all of these symptoms, and some individuals may have no symptoms at all. If you suspect you may have FMD or are experiencing any concerning symptoms, it is important to consult with a healthcare professional for an accurate diagnosis and appropriate management.

Diagnosis

To diagnose fibromuscular dysplasia (FMD), the following examinations, tests, and procedures are commonly performed:

• Computed tomography angiography (CTA): This is a CT scan done in conjunction with the injection of a dye introduced through an intravenous catheter to visualize your blood vessels.
• Magnetic resonance angiography: This is typically performed if CTA is contraindicated
• Duplex ultrasonography: This is a reliable modality for imaging the carotid, vertebral and renal arteries. Limited by ultrasound technician experience.
• Catheter-based angiography: This is an invasive procedure that has the highest resolution of all imaging modalities for FMD.

It's important to consult with your healthcare provider to determine which specific examinations, tests, and procedures are appropriate for your individual situation.

Treatment Options

The goals of treatment for fibromuscular dysplasia (FMD) are to manage symptoms, prevent complications, and improve overall quality of life. Treatment options for FMD may include:

Medications:

• Blood pressure medications: These medications help control high blood pressure, which is common in FMD. They work by relaxing blood vessels and reducing the workload on the heart.

Procedures:

• Angioplasty and stenting: This procedure involves inserting a balloon-tipped catheter into the narrowed or blocked artery to widen it. A stent may be placed to keep the artery open.
• Renal artery bypass surgery: In severe cases of renal artery FMD, bypass surgery may be performed to redirect blood flow around the blocked artery.

Health behavior changes:

• Lifestyle modifications: Adopting a healthy lifestyle can help manage FMD. This includes maintaining a balanced diet, exercising regularly, quitting smoking, and managing stress.

It's important to note that treatment plans are individualized based on the severity and location of FMD, as well as other factors. It's best to consult with a healthcare professional for personalized treatment recommendations.