Get the Facts on Blood Clots
How does a blood clot form?
Blood returns to the heart through veins. When the blood clumps together and turns into solid material, it is called a blood clot. When the clot is in the deep vein it is called deep vein thrombosis (DVT). Deep vein thrombosis (DVT) usually occurs in the leg veins.
If the clot breaks off and travels to the lungs, it can cause a pulmonary embolism (PE) – a clot that blocks blood flow to the lungs, which can be deadly.
Symptoms of DVT
DVT causes symptoms in only about half the people who develop this condition. Symptoms may include:
- Swelling of the leg
- Pain or tenderness in the leg
- Increased warmth in the swollen or painful area
- Red or discolored skin in the swollen or painful area of the leg
Symptoms of PE
Some people may not know they have a DVT until it breaks off and travels to the lungs, causing a pulmonary embolism. PE is an emergency situation requiring immediate medical help.
PE symptoms include:
- Sharp chest pain when taking a deep breath
- Shortness of breath
- Bloody cough
- A rapid or irregular heartbeat
- Feeling of anxiety
- Feeling faint or passing out
Ask the Expert
Know The Facts About DVT
How a Clot Can Become a PE
Watch this video (<1 min) from the American Society of Hematology.