Conditions
Deep Vein Thrombosis (DVT): Recognize It Early, Treat It Right
A deep vein thrombosis is a blood clot in one of the deep veins, usually in the leg. It matters for two reasons: a piece of the clot can break loose and travel to the lungs — a life-threatening pulmonary embolism — and even when treated, a clot can leave lasting leg problems. Recognizing DVT early and getting the right treatment protects against both.
Cardentey Vascular Care evaluates and treats DVT, including the more complex clots and the long-term venous problems that can follow.
What is deep vein thrombosis?
Deep vein thrombosis (DVT) is a blood clot that forms in a deep vein, most often in the calf or thigh. Unlike the harmless clotting that seals a cut, a DVT blocks blood flow inside the vein and can grow or break loose. DVT and pulmonary embolism together are known as venous thromboembolism (VTE).
What are the symptoms of a DVT?
The most common symptoms are swelling, pain, warmth, and redness in one leg — though DVT can also occur with very few symptoms, which is part of what makes it dangerous. Warning signs include:
- Swelling in one leg (occasionally both), often in the calf
- Pain or tenderness, sometimes described as a cramp or "charley horse" that won't go away
- Warmth and redness or discoloration over the area
- A feeling of heaviness or tightness in the leg
Because these symptoms can be subtle or mistaken for a pulled muscle, any new, unexplained leg swelling or pain deserves prompt evaluation.
These can be signs of a pulmonary embolism, a medical emergency.
Why is a DVT dangerous?
A DVT is dangerous because the clot can break loose and travel to the lungs, causing a pulmonary embolism (PE) that can be fatal. Clots above the knee carry the highest risk. Beyond that immediate danger, a DVT can also damage the vein's delicate valves, leading to a long-term condition called post-thrombotic syndrome — chronic leg swelling, aching, and skin changes — in a significant share of people who've had a proximal DVT. Prompt, proper treatment lowers both risks.
What causes a DVT, and who is at risk?
DVT happens when blood flow slows and clotting is triggered, often from a combination of factors. Risk is higher with:
- Recent surgery, hospitalization, or injury
- Long periods of immobility — extended bed rest or long flights and car trips
- Cancer and some cancer treatments
- Pregnancy and the weeks after delivery
- Estrogen-containing birth control or hormone therapy
- A personal or family history of blood clots, or an inherited clotting disorder
- Older age, obesity, and smoking
In some people, an anatomical issue such as compression of a pelvic vein (May-Thurner syndrome) contributes to clots forming on one side — something a vascular specialist can identify and treat.
How is a DVT diagnosed and treated?
DVT is diagnosed with a painless venous duplex ultrasound, often along with a blood test (D-dimer). Because symptoms are non-specific, prompt testing is essential to confirm or rule out a clot.
Treatment depends on the clot's size and location:
- Anticoagulation (blood thinners) is the foundation for most DVTs. Modern direct oral anticoagulants have made treatment simpler than the older warfarin-based regimens, and therapy typically lasts at least three to six months.
- Catheter-based clot removal or clot-dissolving treatment may be considered for extensive clots high in the leg (iliofemoral DVT) in selected patients, to relieve severe symptoms and reduce the risk of long-term damage.
- Treating an underlying cause, such as relieving vein compression with a stent in May-Thurner syndrome, when one is found.
- Compression and follow-up to reduce the risk and severity of post-thrombotic syndrome.
A vascular specialist's role is especially important for complex or recurrent clots, clots high in the leg or pelvis, and the chronic venous problems that can follow a DVT.
When should I seek care for a possible DVT?
Seek prompt medical care for any new, unexplained leg swelling, pain, warmth, or redness — especially in one leg. If you also have chest pain, shortness of breath, or are coughing up blood, call 911, as these may signal a pulmonary embolism.
FAQ
Frequently asked questions
A DVT often causes swelling, pain, warmth, and redness in one leg, but symptoms can be subtle or mimic a muscle strain. There's no reliable way to tell at home, so new or unexplained leg swelling or pain should be evaluated promptly with an ultrasound, which is the only way to confirm or rule out a clot.
DVT should never be ignored or left to resolve on its own, because of the risk that the clot travels to the lungs. With proper anticoagulation, the body gradually breaks down the clot while treatment prevents it from growing or breaking loose. Untreated DVT can be life-threatening.
After a proximal DVT, some people develop post-thrombotic syndrome — ongoing leg swelling, aching, heaviness, and sometimes skin changes or ulcers — caused by damage to the vein’s valves. Prompt treatment and compression reduce this risk, and a vascular specialist can help manage symptoms if they develop.
Many uncomplicated DVTs are managed with blood thinners, but a vascular specialist is valuable for extensive clots high in the leg, recurrent clots, an underlying vein compression, or lasting leg problems after a clot. A vascular evaluation can determine whether more than anticoagulation is needed.
New leg swelling or pain? Don't wait to get it checked
A DVT is far safer to treat early than late. If you have unexplained swelling, pain, or warmth in a leg, a quick ultrasound can tell you whether a clot is present.
Call our Largo office, or request an appointment online. For chest pain or shortness of breath, call 911.