What is Thrombosis?

Thrombosis is the formation of a blood clot, known as a thrombus, within a blood vessel causing a partial or total obstruction; it prevents blood from flowing normally through the circulatory system. When the blood clot flows through the body, it can harm important organs such as the brain, heart, lungs, or leg arteries. When it blocks blood flow, serious health issues can arise, such as stroke, heart attack, or pulmonary embolism.

Types of Blood Clots


Related Health Topics


Additional Resources

NATF is dedicated to providing you with the information you need to live your best life after experiencing a blood clot.

The Patient Pulse: A Blood Clot Education Series

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