Fibromuscular Dysplasia: A Vascular Condition You Should Know
Fibromuscular dysplasia, also called FMD, is a disease of the arteries. It causes abnormal growth inside the artery wall. This can narrow or twist the vessel.
Unlike plaque buildup in arteries, FMD is not caused by cholesterol. It is not typical atherosclerosis.
FMD most often affects the arteries that supply the kidneys and brain. It can also affect other vessels.
What Happens in Fibromuscular Dysplasia?
In FMD, parts of the artery wall grow too thick. This causes areas of narrowing and widening. Doctors often describe a string of beads pattern on imaging.
The narrowing reduces blood flow. Reduced flow can cause symptoms or serious problems.
FMD is more common in women. It can appear in young adults. Many patients are diagnosed during evaluation for hypertension in young adults.
Common Symptoms
Symptoms depend on which arteries are involved.
If kidney arteries are affected, high blood pressure is common.
If brain arteries are involved, symptoms may include:
- Headaches
- Dizziness
- Ringing in the ears
- Stroke warning signs and symptoms
- Weakness or speech trouble
FMD can increase risk of ischemic stroke or transient ischemic attack also called TIA.
If leg arteries are involved, symptoms may look like peripheral artery disease also called PAD.
How FMD Differs From Atherosclerosis
FMD is not caused by fatty plaque.
It is linked to abnormal vessel wall structure. However, patients may also have traditional risk factors such as high cholesterol.
Doctors may still check:
- Advanced lipid testing
- Lipoprotein(a)
- Homocysteine and arterial health markers
- C reactive protein also called CRP and other inflammation biomarkers
These tests help assess overall vascular risk.
Effects on the Arteries
FMD can affect vessel flexibility. This relates to arterial stiffness and abnormal endothelial shear stress.
When the inner lining of arteries does not work well, this is called endothelial dysfunction.
In some cases, small heart vessels may be involved. This may affect coronary microvascular disease or reduce coronary vasodilator reserve.
Rarely, symptoms similar to vasospastic angina may occur.
Diagnosis
FMD is often found through imaging tests.
Ultrasound, CT scan, or MRI can show abnormal artery patterns.
Sometimes cardiac catheterization is used to examine blood flow directly.
Early diagnosis is important to prevent complications.
Treatment
There is no cure, but treatment can control symptoms and reduce risk.
Common treatments include:
- Blood pressure control
- Antiplatelet therapy
- Lifestyle changes
If a severe narrowing is present, doctors may perform balloon angioplasty to open the artery.
Surgery is rarely needed.
Lifestyle and Long Term Care
Most people with FMD live full lives with proper care.
Control blood pressure carefully. Avoid smoking. Maintain healthy weight.
Stress and emotional heart health also matter. Stress can raise blood pressure and worsen symptoms.
Regular follow up with a vascular specialist is important.
Final Thoughts
Fibromuscular dysplasia is different from common artery disease.
It affects the vessel wall structure, not cholesterol plaque.
Early detection and strong blood pressure control help prevent serious problems such as stroke.
Ongoing care keeps arteries healthy and reduces long term risk.