Medically reviewed by Nachiket J. Patel, MD, FACC, FSCAI. Last reviewed July 2026.
Deep vein thrombosis, or DVT, is a blood clot in a deep vein, most often in the leg or pelvis. A DVT can block venous return, damage vein valves, and sometimes break loose and travel to the lungs.
Symptoms range from subtle tightness to marked one-sided swelling and pain. Some clots produce few symptoms, so personal risk and ultrasound findings matter.
Flow Heart & Vascular evaluates and treats venous disease in the outpatient setting. Sudden chest pain, unexplained shortness of breath, coughing blood, or fainting may indicate a pulmonary embolism and requires an immediate call to 911.
What are the symptoms of DVT?
Muscle injury, cellulitis, a ruptured cyst, venous insufficiency, and lymphedema can look similar. Symptoms alone cannot confirm a clot.
- Swelling in one leg or arm
- Pain, tenderness, cramping, or heaviness
- Warmth or redness
- New visible surface veins
- A feeling of fullness in the thigh or groin
- Persistent swelling after travel, surgery, illness, or immobility
Who is at higher risk for a blood clot?
A clot often develops when blood flow slows, the vein is injured, or the blood is unusually prone to clotting. Several modest risks can combine.
- Recent surgery, hospitalization, or prolonged immobility
- Long-distance travel
- Cancer or certain cancer treatments
- Pregnancy and the postpartum period
- Estrogen-containing medication
- Prior DVT or pulmonary embolism
- A known clotting disorder
- Major injury
- Compression of a pelvic vein, including May-Thurner syndrome
How is DVT diagnosed?
Venous duplex ultrasound is the main test for a suspected leg DVT. It looks at blood flow and whether the vein compresses normally.
A D-dimer blood test can be useful in selected lower-risk situations, but it is not specific and may be elevated for many reasons. CT or MR venography may be considered when a pelvic or abdominal vein problem is suspected.
The report should identify where the clot begins and ends, whether it appears acute or chronic, and whether a major outflow obstruction may be present.
How is DVT treated?
Anticoagulation is the main treatment for most acute DVT. It lowers the chance that the clot will grow or recur while the body gradually reorganizes it. The medication and treatment duration depend on clot location, cause, bleeding risk, kidney function, and prior events.
Selected patients with extensive symptomatic iliofemoral DVT may benefit from catheter-based thrombectomy to remove clot and restore venous flow. This is not necessary for every DVT and should be considered after weighing symptom severity, timing, anatomy, and bleeding risk.
Compression, walking, and follow-up ultrasound may be recommended in some cases. Long-term swelling or skin change can reflect post-thrombotic syndrome and deserves ongoing management.
What to bring to a DVT visit
Bring the ultrasound report and, if possible, the images; a current medication list; dates of recent surgery, travel, hospitalization, or hormone therapy; and details of previous clots.
Do not stop an anticoagulant before a visit unless the prescribing clinician gives specific instructions. If swelling or pain suddenly worsens, seek prompt reassessment.
Frequently asked questions
Can I walk after a DVT?
Many patients can remain mobile once treatment has begun, but activity advice should reflect symptoms, clot extent, and the treating clinician’s plan.
Does every DVT require thrombectomy?
No. Anticoagulation is sufficient for many clots. Thrombectomy is reserved for selected patients with extensive disease and a reasonable chance of meaningful benefit.
Will the clot disappear completely?
It may shrink or reorganize over time, but some residual material or valve damage can remain. Symptom improvement and prevention of recurrence are key goals.
Related heart and vascular information
- May-Thurner Syndrome
- Vascular Ultrasound Testing (Arterial, Venous, Carotid)
- Thrombectomy (Clot Removal)
Schedule an appointment
If you have a stable heart or circulation concern, request an appointment with Flow Heart & Vascular in Mesa, Arizona. Call 911 for emergency symptoms.
This page provides general education and does not replace individualized medical advice.
