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What causes postthrombotic syndrome in deep vein thrombosis?

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When a clot stays in your leg or arm for too long, it can damage the vein or its valves. Valves that don't work right let blood backflow and pool, instead of pushing it toward the heart. Postthrombotic syndrome is usually mild, but some symptoms can be severe. They may not show up until years later.

SOURCES:

American Venous Forum: "Acute Deep Venous Thrombosis and Its Complications."

WebMD Medical Reference from eMedicine: "Deep Venous Thrombosis."

MedlinePlus: "Medical Encyclopedia: Pulmonary Embolus."

NHS Choices: "Deep vein thrombosis - Complications."

Reviewed by Suzanne R. Steinbaum on August 25, 2019

SOURCES:

American Venous Forum: "Acute Deep Venous Thrombosis and Its Complications."

WebMD Medical Reference from eMedicine: "Deep Venous Thrombosis."

MedlinePlus: "Medical Encyclopedia: Pulmonary Embolus."

NHS Choices: "Deep vein thrombosis - Complications."

Reviewed by Suzanne R. Steinbaum on August 25, 2019

NEXT QUESTION:

What are the long-term effects of postthrombotic syndrome in deep vein thrombosis?

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