World Thrombosis Day

1 in 4 Deaths Worldwide is Related to Thrombosis

Thrombosis is a leading cause of death throughout the world. Learn the symptoms, know the facts, and help educate others about this growing health problem.

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  • Learn

    Know Thrombosis. Know the risk factors.
    Know the signs and symptoms.

  • Join

    Join the global movement to stop deadly clots and keep life flowing.

  • Take Action

    Download resources, hold events and
    share life-saving information.


know Thrombosis

Thrombosis refers to abnormal, life-threatening blood clots that form in the artery or vein. A clot in the vein (usually in the leg or pelvis) is known as a deep vein thrombosis (DVT) and a clot that breaks off and travels to the lungs is known as a pulmonary embolism (PE). Together, DVT and PE make up venous thromboembolism (VTE).

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Thrombosis: A Global Problem

Worldwide, one in four people die from causes related to thrombosis. Without addressing this disease head on, we cannot meet the World Health Assembly's global target to reduce premature non-communicable mortality by 25 percent by 2025.

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VTE: A Major Contributor of Disease Burden

Venous thromboembolism is a leading cause of death and disability worldwide. In Europe and the U.S., it claims more lives than AIDS, breast and prostate cancer, and motor vehicle crashes combined.

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Hospital-Associated VTE

Being in a hospital can increase your risk of developing VTE. Up to 60 percent of all VTEs are hospital-associated and more than 10 million cases occur every year - many of them preventable. VTE is the leading cause of preventable hospital death, ahead of infection and pneumonia.

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Know Atrial Fibrillation

Atrial Fibrillation (AFib) is a common type of arrhythmia, or irregular heartbeat. Because the heart beats and contracts irregularly, blood flow may slow or pool and cause the formation of a clot. This clot is an example of arterial thromboembolism. If it breaks free, it can lodge in an artery, travel to the brain and result in a stroke. Know the risk factors for a stroke. Take action.

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Personal Stories


Founding Partner

Bayer HealthCare

Global Partners

Bristol-Myers Squibb Daiichi-Sankyo Janssen Portola

Global Supporter

Cardinal Health Shire