Woman experiencing leg swelling and pain from deep venous thrombosis

Deep Venous Thrombosis (DVT) Diagnosis & Treatment in Pasadena, TX

At Minimally Invasive Specialists of Texas, our interventional radiology team provides prompt, expert diagnosis and treatment for deep venous thrombosis (DVT) — a serious condition in which a blood clot forms in a deep vein, most commonly in the legs. From Doppler ultrasound and blood testing to advanced interventions such as catheter-directed thrombolysis and IVC filter placement, we offer comprehensive DVT care to protect your vascular health. Call (832) 583-2246 today to schedule your evaluation in Pasadena, TX .

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What Is Deep Venous Thrombosis (DVT)?

Deep venous thrombosis (DVT) is a serious and potentially life-threatening medical condition that occurs when a blood clot forms in one of the deep veins of the body — most commonly in the legs, thighs, or pelvis. Unlike superficial vein clots, which form in veins close to the skin’s surface, deep vein clots develop in larger veins located deep within the muscle tissue and can have severe consequences if not diagnosed and treated promptly.

DVT affects an estimated 900,000 Americans each year and is one of the leading causes of preventable hospital death in the United States. The condition can occur in otherwise healthy individuals, though certain risk factors significantly increase the likelihood of developing a clot. If you are experiencing symptoms of DVT, do not wait — contact Minimally Invasive Specialists of Texas immediately at (832) 583-2246 for urgent evaluation in Pasadena, TX .

What Are the Symptoms of DVT?

DVT symptoms can vary widely in severity, and some cases may present with no noticeable symptoms at all — making timely medical evaluation critical if any risk factors are present. Common symptoms of DVT include:

  • Swelling in one leg, ankle, or foot — often occurring on one side only
  • Pain or cramping in the leg, typically starting in the calf and sometimes feeling like a persistent muscle cramp
  • Warmth in the skin over the affected area
  • Redness or discoloration of the skin on the leg
  • Heaviness or fatigue in the affected limb

It is important to note that up to half of all DVT cases are asymptomatic, meaning no obvious signs are present. This makes awareness of risk factors and prompt diagnostic testing especially important. If you have any reason to suspect a blood clot, call Minimally Invasive Specialists of Texas at (832) 583-2246 without delay.

What Are the Risk Factors for DVT?

DVT can develop in anyone, but several conditions and lifestyle factors are known to significantly increase risk, including:

  • Prolonged immobility — such as long-haul travel, bed rest, or post-surgical recovery
  • Recent surgery, particularly orthopedic procedures involving the hip, knee, or leg
  • Active cancer or cancer treatment
  • Pregnancy and the postpartum period
  • Obesity or excess body weight
  • A personal or family history of DVT or blood clotting disorders
  • Use of hormonal medications such as birth control pills or hormone replacement therapy
  • Smoking
  • Older age
  • Chronic conditions such as heart disease or inflammatory bowel disease

Patients with known peripheral arterial disease or chronic venous disease may also face an elevated risk of DVT. Understanding your risk profile is the first step toward prevention and early detection.

Why Is DVT Dangerous?

The most serious complication of untreated DVT is a pulmonary embolism (PE) — a potentially fatal event that occurs when a blood clot breaks free from the deep vein, travels through the bloodstream, and becomes lodged in the arteries of the lungs. A pulmonary embolism can cause sudden shortness of breath, chest pain, rapid heart rate, and in severe cases, cardiac arrest and death.

Beyond the immediate risk of pulmonary embolism, DVT can also cause long-term damage to the affected vein, leading to a chronic condition called post-thrombotic syndrome — characterized by persistent leg pain, swelling, skin changes, and in severe cases, venous ulcers. Early and effective treatment of DVT is essential to prevent both acute and long-term complications.

How Is DVT Diagnosed?

At Minimally Invasive Specialists of Texas, our team uses a combination of clinical evaluation and advanced diagnostic testing to confirm the presence of a deep vein clot, including:

  • Doppler Ultrasound: The primary diagnostic tool for DVT. This non-invasive vascular ultrasound uses sound waves to visualize blood flow in the deep veins and detect the presence, location, and extent of a clot in real time.
  • D-dimer Blood Test: A blood test that measures a substance released when a clot breaks down. An elevated D-dimer level can indicate the presence of an abnormal clot, though it is typically used in conjunction with imaging studies.
  • CT Venography or MR Venography: Advanced imaging techniques used in complex cases or when ultrasound results are inconclusive, providing detailed visualization of the deep venous system.

Prompt and accurate diagnosis is critical to initiating effective treatment and reducing the risk of life-threatening complications. Contact Minimally Invasive Specialists of Texas at (832) 583-2246 if you are concerned about DVT symptoms in Pasadena, TX .

How Is DVT Treated?

Treatment for DVT at Minimally Invasive Specialists of Texas is tailored to the severity of the clot, its location, and each patient’s individual medical history. Our approach may include one or more of the following:

  • Anticoagulant Medications (Blood Thinners): The cornerstone of DVT treatment. Anticoagulants prevent the existing clot from growing larger, reduce the risk of new clots forming, and allow the body’s natural clot-dissolving mechanisms to work over time. Options include injectable medications (such as heparin or enoxaparin) and oral anticoagulants.
  • Catheter-Directed Thrombolysis (CDT): A minimally invasive interventional procedure in which a thin catheter is placed directly into the clot and clot-dissolving medication is delivered precisely to the site of the thrombus. CDT is recommended for extensive or high-risk clots and can significantly reduce the risk of post-thrombotic syndrome compared to anticoagulation alone.
  • Mechanical Thrombectomy: A catheter-based procedure that mechanically removes or breaks up the clot, often used in combination with thrombolytic therapy for large or acute clots causing severe symptoms.
  • IVC Filter Placement: In patients who cannot safely receive anticoagulation or who continue to develop clots despite treatment, a small filter device can be placed inside the inferior vena cava (the large vein that carries blood from the lower body to the heart) to trap clots before they can travel to the lungs and cause a pulmonary embolism.
  • Compression Therapy: Compression stockings are commonly prescribed after DVT treatment to reduce swelling, improve circulation, and lower the risk of post-thrombotic syndrome.

Our interventional radiology team will work closely with you and your referring physician to determine the most appropriate treatment plan. We also coordinate care with related services including dialysis access and peripheral arterial disease management for patients with complex vascular needs. Call Minimally Invasive Specialists of Texas at (832) 583-2246 to learn more.

Frequently Asked Questions About Deep Venous Thrombosis

What is the difference between DVT and a superficial blood clot?

A superficial blood clot, or superficial thrombophlebitis, forms in veins located just beneath the skin and is generally less dangerous than DVT. Deep venous thrombosis forms in the larger, deeper veins of the legs, pelvis, or arms and carries a significantly higher risk of breaking free and causing a pulmonary embolism. Both conditions should be evaluated by a physician, but DVT requires more urgent diagnosis and treatment. If you are unsure which type of clot you may have, contact Minimally Invasive Specialists of Texas at (832) 583-2246 for evaluation in Pasadena, TX .

Can DVT go away on its own without treatment?

While the body does have some ability to naturally dissolve blood clots over time, DVT should never be left untreated. Without proper anticoagulation or intervention, an untreated DVT can grow larger, break off and travel to the lungs causing a life-threatening pulmonary embolism, or cause permanent damage to the vein valves leading to chronic post-thrombotic syndrome. Prompt medical treatment is essential.

How long does DVT treatment last?

The duration of DVT treatment depends on a number of factors, including the location and extent of the clot, whether it was provoked by a temporary cause (such as surgery or immobility) or unprovoked, and whether you have underlying clotting disorders or recurring clots. Anticoagulation therapy typically lasts a minimum of three months, and some patients may require longer-term or indefinite treatment. Your care team at Minimally Invasive Specialists of Texas will develop a personalized treatment plan based on your specific situation.

What is an IVC filter and when is it used?

An IVC (inferior vena cava) filter is a small, cage-like device placed inside the inferior vena cava — the large vein that returns blood from the lower body to the heart — to trap blood clots before they can reach the lungs. It is typically recommended for patients who have a confirmed DVT but cannot safely take anticoagulant medications, or who continue to develop clots despite anticoagulation therapy. At Minimally Invasive Specialists of Texas, IVC filter placement is performed as a minimally invasive, image-guided procedure by our interventional radiology team.

What is catheter-directed thrombolysis and who is it recommended for?

Catheter-directed thrombolysis (CDT) is a minimally invasive procedure in which our interventional radiologists insert a thin catheter directly into the blood clot and administer clot-dissolving medication — called a thrombolytic — precisely at the site of the DVT. CDT is typically recommended for patients with extensive or acute DVT causing severe symptoms, or for those at high risk of developing post-thrombotic syndrome. Compared to anticoagulation alone, CDT can more rapidly dissolve large clots and better preserve the function of the vein valves.

Can DVT recur after treatment?

Yes, DVT can recur, particularly in patients with persistent risk factors such as active cancer, inherited clotting disorders, or a history of multiple DVT episodes. Following the completion of treatment, our team at Minimally Invasive Specialists of Texas will discuss strategies to reduce your risk of recurrence, including lifestyle modifications, ongoing compression therapy, and in some cases long-term anticoagulation. Regular follow-up with your vascular care team is important for monitoring your long-term vascular health.

When should I go to the emergency room versus calling Minimally Invasive Specialists of Texas for DVT symptoms?

If you are experiencing symptoms that may suggest a pulmonary embolism — including sudden shortness of breath, chest pain, rapid heartbeat, coughing up blood, or lightheadedness — you should call 911 or go to the nearest emergency room immediately, as this is a life-threatening emergency. If you are experiencing leg swelling, pain, warmth, or redness without respiratory symptoms, contact Minimally Invasive Specialists of Texas urgently at (832) 583-2246 for prompt evaluation and diagnostic testing in Pasadena, TX .