February 25- 26, 2009

This February 25th & 26th NATT will join forces with the National Hemophilia Foundation (NHF), and others from across the coagulation spectrum to advocate on behalf of all Americans affected by clotting and bleeding disorders. This is your chance to walk the Halls of Congress, meet with your elected officials and put a face on issues that affect people with clotting disorders.

Registration deadline is February 4th

Register Today!

Click here for complete details.

National Alliance for Thrombosis and Thrombophilia - Stop the Clot TM Website

The National Alliance for Thrombosis and Thrombophilia (NATT) is a patient led advocacy group dedicated to prevent, diagnose and treat thrombosis and thrombophilia through research, education, support and advocacy.

Several hundred thousand Americans die each year from blood clots in the veins. Most of these lives could have been saved if more patients and health professionals had known about the symptoms, risks,  and treatments.   NATT has joined forces with the CDC, US Surgeon General and other voluntary health agencies to promote education, diagnosis and treatment of blood clots.   Please browse our site to learn more about blood clots and join with us to help Stop the Clot. 

Know the Symptoms for Deep Vein Thrombosis and Seek Medical Assistance Immediately

Deep Vein Thrombosis (DVT) is a blood clot that usually occurs in the leg, most often on one side, although it can happen in other parts of the body.  DVT afflicts over 380,000 people per year in the United States.  If the blood clot dislodges, it can travel to the lungs and cause a blockage known as a pulmonary embolism (PE) or lung clot.  Lung clots affect over 530,000 people a year and 300,000, or almost 1 out of 3, are fatal.

Watch for these DVT (leg clot) symptoms:
Watch for these PE (lung clot) symptoms:

Get HELP right away if you experience these symptoms!


Visit our Learn More section for detailed information on the symptoms, risks and treatment options as well as information on rare conditions. Visit our Patient Stories section to read actual patient accounts of their blood clot experience.  If you are a medical professional seeking tools and information for your practice visit our For Professionals section to learn more.

Are You At Risk for a Blood Clot?

The following is a list of risk factors for thrombosis and thrombophilia:

Click here for more information on the risk factors for blood clots. 

The Blood Clot Statistics Are Staggering

The good news is that positive lifestyle choices and optimal treatment in high-risk situations can save lives and prevent blood clots in a significant number of cases…

However, the bad news is that only 50% of those with DVT have symptoms, making this “Silent Killer” extremely difficult to diagnose. This is compounded by the fact that 74% of Americans have no knowledge about DVT, its symptoms or risk factors.

This is why raising awareness is critical. The National Alliance for Thrombosis and Thrombophilia (NATT) is working to prevent, diagnose and treat thrombosis and thrombophilia through education, research, support and advocacy.  

Stop the Clot Education Project

NATT combines the unique perspectives of health care providers, individuals afflicted with clotting disorders and community leaders who are passionate about this health care crisis. NATT’s Medical and Scientific Advisory Board includes nationally recognized experts on thrombosis and thrombophilia.

NATT is working closely with the Centers for Disease Control (CDC), thrombophilia centers, anticoagulation clinics, hemophilia treatment centers and the National Hemophilia Foundation on its Stop the ClotTM Education Project, whose components  include:

Why Get Involved to Help Stop the Clot?

NATT VolunteersBecause it’s a question of life and death.  You can help us save lives – “Stop the Clot” – and improve the quality of lives – by supporting our efforts. Find out how you can Volunteer or Donate.    

Are you a blood clot patient looking for to learn more about treatment and prevention?

We have included extensive information on our site about prevention and treatment of blood clots and clotting disorders.  Please explore our learn more section for special FAQ's, publications, and healthcare provider resources.

How Can We Make Our Site Better?

If you have a suggestion, comment or question, please feel free to contact us by clicking here and sending us an e-mail.

Our site is updated often so please check back for late breaking news and information.