Why Do Blood Clots Form?

With Dr Andrew Choong, vascular and endovascular surgeon in Singapore

Published 2 March 2026 · 1 min · Watch on YouTube

About this video

Dr Andrew Choong explains Virchow’s triad: slow blood flow, a greater tendency to clot and injury to the vessel lining. He relates these three factors to situations such as surgery, immobility and other blood clot risks.

Original video: Why Do Blood Clots Form? DVT & PE Risk Explained #bloodclot #dvt #pulmonaryembolism

Read the accompanying article for the written explanation and further context.

Related patient information

Deep vein thrombosis (DVT)
Pulmonary embolism
DVT treatment options

For an individual assessment or second opinion, contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre, #09-22, 38 Irrawaddy Road, Singapore 329563.

This video provides general information and does not replace individual medical advice. For a medical emergency in Singapore, call 995.

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