Your Platelet Glue
von Willebrand Factor (vWF) is the molecular glue that helps platelets stick to damaged blood vessel walls and to each other. Without enough vWF, platelets can't form an initial plug at the injury site. vWF also carries and protects Factor VIII. von Willebrand Disease (vWD) is the most common inherited bleeding disorder—affecting up to 1% of the population.
What is von Willebrand Factor?
vWF is a large multimeric glycoprotein produced by endothelial cells and megakaryocytes. It mediates platelet adhesion to collagen at injury sites and carries/stabilizes Factor VIII. vWD is classified into Type 1 (partial quantitative, 70-80%), Type 2 (qualitative variants), Type 3 (complete absence, rare and severe).
↑ What High von Willebrand Factor Means
vWF rises with inflammation, stress, exercise, estrogen, and endothelial damage. Chronically elevated vWF is an independent cardiovascular risk marker and is elevated in diabetes, liver disease, and malignancy.
Common symptoms:
Usually reflects underlying inflammation or endothelial damage · Associated with cardiovascular risk
↓ What Low von Willebrand Factor Means
von Willebrand Disease—difficulty forming platelet plugs. Causes mucosal bleeding: heavy periods, nosebleeds, easy bruising, prolonged bleeding after surgery/dental work.
Common symptoms:
Easy bruising · Prolonged bleeding from cuts · Heavy menstrual periods (often the presenting symptom) · Nosebleeds · Bleeding after dental work or surgery · GI bleeding
Why It Matters
When normal:
Most common inherited bleeding disorder when low
Explains mucosal-type bleeding
Carries and protects Factor VIII
Elevated vWF is a cardiovascular/endothelial damage marker
Risks if abnormal:
Low: mucosal bleeding, surgical bleeding, heavy menstruation
Very low (Type 3): severe bleeding similar to hemophilia
High: cardiovascular risk marker, thrombotic risk
What Can Cause Abnormal Levels?
von Willebrand Disease (low)
50% likelyInherited. Type 1 (mild deficiency, 70-80% of cases) is often undiagnosed until surgical challenge or heavy periods.
Acute Phase Response (high)
45% likelyvWF is an acute phase reactant. Stress, inflammation, infection, and exercise elevate it—sometimes masking vWD.
Blood Type O (naturally lower)
Type O individuals have 25-30% lower vWF than other blood types.
Hypothyroidism (low)
Hypothyroidism can lower vWF.
Estrogen (high)
Pregnancy and OCP raise vWF—may mask vWD diagnosis.
Acquired vWD (low)
Rare. Associated with aortic stenosis, lymphoproliferative disorders, and autoimmune conditions.
What You Can Do
If suspected vWD: test multiple times (vWF fluctuates)
Impact: Stress, inflammation, and cycle phase affect results \u00B7 Timeline: Multiple samples
Inform all surgeons and dentists about vWD diagnosis
Impact: Preprophylaxis prevents surgical bleeding \u00B7 Timeline: Lifelong
Avoid aspirin and NSAIDs (impair platelet function on top of vWD)
Impact: Reduces bleeding risk \u00B7 Timeline: Ongoing
If lifestyle changes aren't enough:
DDAVP (desmopressin) nasal spray for Type 1 vWD
Impact: Releases stored vWF and Factor VIII 3-5x. First-line for mild-moderate bleeding/procedures. \u00B7 Timeline: Minutes
Tranexamic acid for mucosal bleeding
Impact: Stabilizes clots. Excellent for dental procedures and heavy periods. \u00B7 Timeline: As needed
Recommended retest: Multiple samples to confirm diagnosis; pre-procedural levels for management
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