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Who Is at Risk for Deep Vein Thrombosis?

The risk factors for deep vein thrombosis (DVT) include:

  • A history of DVT.
  • Conditions or factors that make your blood thicker or more likely to clot than normal. Some inherited blood disorders (such as factor V Leiden) will do this. Hormone therapy or birth control pills also increase the risk of clotting.
  • Injury to a deep vein from surgery, a broken bone, or other trauma.
  • Slow blood flow in a deep vein due to lack of movement. This may occur after surgery, if you're ill and in bed for a long time, or if you're traveling for a long time.
  • Pregnancy and the first 6 weeks after giving birth.
  • Recent or ongoing treatment for cancer.
  • A central venous catheter. This is a tube placed in a vein to allow easy access to the bloodstream for medical treatment.
  • Older age. Being older than 60 is a risk factor for DVT, although DVT can occur at any age.
  • Overweight or obesity.
  • Smoking.

Your risk for DVT increases if you have more than one of the risk factors listed above.

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Deep Vein Thrombosis Clinical Trials

Clinical trials are research studies that explore whether a medical strategy, treatment, or device is safe and effective for humans. To find clinical trials that are currently underway for Deep Vein Thrombosis, visit www.clinicaltrials.gov.


Deep Vein Thrombosis in the News

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October 28, 2011 Last Updated Icon

The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.