Deep Vein Thrombosis (DVT) or Pulmonary Embolism (PE)
What is Deep Vein Thrombosis (DVT) or Pulmonary Embolism (PE)?
Deep vein thrombosis happens when a blood clot forms in a deep vein, usually in the leg. These clots can cause pain and swelling. They can also break free and travel through the bloodstream to the lungs.
When a clot blocks blood flow in the lungs, it causes a pulmonary embolism. This is a medical emergency that can make breathing difficult and damage lung tissue. Both conditions are part of the same disease process called venous thromboembolism.
Blood clots typically form when blood flow slows down or when the blood becomes thicker than normal. Long periods of sitting, surgery, or certain medical conditions can trigger clot formation. Early detection and treatment can prevent serious complications and save lives.
Symptoms
- Leg pain or tenderness, often starting in the calf
- Swelling in one leg or arm
- Warmth or redness in the affected area
- Sudden shortness of breath
- Sharp chest pain that worsens with deep breaths
- Rapid heart rate or irregular heartbeat
- Coughing up blood
- Lightheadedness or fainting
- Anxiety or feeling of impending doom
- Bluish skin color
Some people with DVT have no symptoms until the clot breaks loose and travels to the lungs. Others may experience mild leg discomfort that they mistake for a muscle strain. Any sudden chest pain or breathing difficulty requires immediate medical attention.
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Causes and risk factors
Blood clots form when blood flow slows down, blood vessels become damaged, or blood becomes too thick. Prolonged sitting during long flights or car rides can slow circulation in the legs. Surgery, injury, or hospitalization can damage blood vessels and trigger clotting. Certain genetic conditions make blood clot more easily than normal.
Risk factors include being over 60, smoking, obesity, pregnancy, birth control pills, and hormone therapy. Cancer and cancer treatments increase clotting risk. Having had a previous blood clot makes you more likely to develop another one. Sitting or lying down for long periods, especially after surgery, creates perfect conditions for clots to form.
How it's diagnosed
Doctors use imaging tests to diagnose DVT and PE. An ultrasound can show blood clots in the leg veins. A CT scan or lung scan can reveal clots in the lungs. Blood tests called D-dimer can help rule out active clotting when results are normal.
Once diagnosed, regular blood testing becomes essential for monitoring treatment. Most patients need blood thinners to prevent new clots and stop existing ones from growing. PT/INR testing tracks how well these medications are working and ensures the dosage is safe and effective. Rite Aid offers PT/INR testing as an add-on to help you stay on top of your treatment and avoid dangerous bleeding or clotting.
Treatment options
- Blood thinners like warfarin to prevent new clots and stop existing clots from growing
- Newer anticoagulants such as rivaroxaban, apixaban, or dabigatran
- Compression stockings to reduce leg swelling and prevent post-clot complications
- Regular movement and avoiding long periods of sitting
- Staying well hydrated to keep blood flowing smoothly
- Maintaining a healthy weight to reduce pressure on leg veins
- Regular PT/INR testing to ensure blood thinner dosage is correct
- In severe cases, clot-busting drugs or surgical removal of the clot
- Vena cava filters for people who cannot take blood thinners
- Quitting smoking to improve blood vessel health
Need testing for Deep Vein Thrombosis (DVT) or Pulmonary Embolism (PE)? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
DVT is a blood clot in a deep vein, usually in the leg. PE happens when a clot breaks free and travels to the lungs, blocking blood flow. They are related conditions because a DVT can cause a PE. Both require immediate medical treatment to prevent serious complications.
Treatment duration varies based on what caused your clot. If you had a temporary risk factor like surgery, you might take blood thinners for 3 to 6 months. If you have ongoing risk factors or multiple clots, you may need lifelong treatment. Your doctor will create a plan based on your individual situation.
PT/INR testing shows how well blood thinners are working. If your blood is too thin, you risk dangerous bleeding. If it is not thin enough, new clots can form. Regular testing helps your doctor adjust your medication to keep you in the safe range.
Yes, you can reduce your risk during long flights. Stand up and walk every 1 to 2 hours. Do ankle circles and leg stretches while seated. Drink plenty of water and avoid alcohol. Wear loose clothing and compression stockings if your doctor recommends them.
Warfarin interacts with vitamin K, which is found in leafy greens like spinach, kale, and broccoli. You do not need to avoid these foods completely. Instead, keep your intake consistent from week to week so your medication can be properly adjusted. Sudden changes in vitamin K intake can affect your PT/INR levels.
DVT is more common in the left leg than the right. This happens because of the way blood vessels are positioned in the body. The left iliac vein can be compressed by an overlying artery, which slows blood flow. However, DVT can occur in either leg or even in the arms.
Yes, blood clots can happen at any age. Young people can develop clots after surgery, injury, or long periods of inactivity. Birth control pills and pregnancy increase risk in younger women. Some people have genetic clotting disorders they may not know about until they develop a clot.
Never wait for a suspected blood clot to resolve on its own. Without treatment, clots can grow larger and break free to cause a pulmonary embolism. Blood thinners help dissolve existing clots and prevent new ones. Seek immediate medical care if you suspect a blood clot.
Regular physical activity is one of the best ways to prevent blood clots. Exercise keeps blood flowing and strengthens leg muscles that help pump blood back to the heart. Even light activity like walking makes a difference. Talk to your doctor about safe exercise options if you have had a clot.
A high PT/INR means your blood is too thin and you risk bleeding. Your doctor will likely lower your warfarin dose. A low PT/INR means your blood is not thin enough and clots could form. Your dose will be increased. Never adjust your medication on your own. Always follow your doctor's instructions based on test results.