CLS Health provides expert deep vein thrombosis (DVT) diagnosis and treatment for patients across the Houston area, with convenient clinic locations in Webster and Pasadena, TX. DVT occurs when a blood clot forms in a deep vein—most commonly in the legs—and can lead to swelling, pain, and potentially serious complications if the clot travels to the lungs (pulmonary embolism, or PE).
Although DVT can occur at any age, the risk increases with prolonged immobility, surgery, certain medications, or underlying medical conditions. With early diagnosis and specialized vascular care, most patients recover fully and reduce their risk of future clots.
What Is Deep Vein Thrombosis (DVT)?
DVT develops when blood flow slows or a vein becomes damaged, causing a clot to form in a deep vein—often in the calf, thigh, or pelvis. Clots may partially or completely block circulation, leading to pain, warmth, or swelling.
A major concern is that the clot can break loose and travel to the lungs, causing a pulmonary embolism, which requires emergency care.
While more common in older adults, DVT can affect anyone, particularly those who recently had surgery, trauma, or long periods of sitting or bed rest.
Types of Deep Vein Thrombosis
- Isolated DVT: Clots below the knee in smaller veins.
- Proximal DVT: Clots in the thigh or pelvis; higher risk for pulmonary embolism.
- Phlegmasia Cerulea Dolens: A rare, severe form causing significant swelling and discoloration.
- Chronic DVT / Post-Thrombotic Syndrome: Long-term symptoms such as heaviness, swelling, or skin changes caused by valve damage after a prior clot.
Symptoms of DVT
Common Symptoms
- Swelling in one leg, ankle, or foot
- Cramping pain or tenderness (often in the calf)
- Warmth or redness in the affected area
- Aching or heaviness that worsens when standing or walking
(Some people experience mild or no symptoms.)
Pulmonary Embolism Warning Signs (Emergency)
- Sudden shortness of breath
- Chest pain or rapid heartbeat
- Coughing up blood
Call 911 immediately if these symptoms occur.
Causes and Risk Factors
DVT develops from a combination of slowed blood flow, vein injury, and increased clotting tendency—known as Virchow’s triad.
Common Causes
- Prolonged sitting, travel, or immobility
- Recent surgery or trauma
- Vein injury or inflammation
- Medical conditions such as cancer or clotting disorders
- Hormonal medications (birth control pills, hormone therapy)
- Genetic clotting tendencies
Major Risk Factors
- Previous DVT or pulmonary embolism
- Active cancer or chemotherapy
- Recent hospitalization or surgery
- Extended immobility
Additional Risk Factors
- Obesity or a sedentary lifestyle
- Smoking
- Pregnancy or postpartum period
- Estrogen-based medications
If you have multiple risk factors, your provider may discuss preventive strategies such as compression therapy or medication.
How Is DVT Diagnosed?
Your vascular specialist will evaluate your symptoms and may order:
- Ultrasound imaging: Primary test to detect clots and assess blood flow
- D-dimer blood test: Identifies clotting activity
- MRI or venography: For complex cases
- Ankle-brachial index (ABI): Helps ensure arterial circulation is adequate before using compression
Deep Vein Thrombosis Treatment Options
Medical Management
- Anticoagulants (blood thinners): Short-term heparin followed by long-term anticoagulants such as warfarin or direct oral anticoagulants (DOACs)
- Thrombolytic therapy: Used only in severe cases to rapidly dissolve large clots
- Compression stockings: Help reduce swelling and prevent post-thrombotic syndrome
Minimally Invasive & Surgical Options
- Catheter-directed thrombolysis:
Places clot-dissolving medication directly into the affected vein - IVC filter placement:
Helps prevent clots from traveling to the lungs when blood thinners cannot be used
Lifestyle & Prevention
General preventive strategies may include:
- Staying active and avoiding prolonged sitting
- Elevating the legs to promote circulation
- Maintaining a healthy weight
- Staying hydrated
- Wearing compression stockings during recovery or long travel
Which Specialist Treats DVT?
Vascular specialists and hematologists diagnose and treat DVT using advanced imaging and targeted therapies. They help monitor recovery, prevent complications, and manage long-term vein health.
If referred by a primary care provider, bring a list of your symptoms, medications, and family history to your appointment for a more complete evaluation.
Expert Deep Vein Thrombosis (DVT) Treatment in Houston
Early treatment is critical. CLS Health’s board-certified vascular surgeons in Webster and Pasadena offer advanced DVT evaluation, imaging, and personalized treatment options.
Schedule your visit today to restore circulation, relieve symptoms, and reduce your long-term risk.