At Shaheen Vascular in Mountain View, CA, we are always focused on protecting our patients’ health and helping people in our community maintain strong vein function so they can stay active and continue doing the activities they enjoy. Much of our work centers on prevention and careful evaluation, making sure there are no circulation issues developing without symptoms.
One condition we may screen for is deep vein thrombosis, which can become dangerous if left untreated, but does not always cause clear or immediate warning signs. Early evaluation and monitoring, plus appropriate treatments, are important for protecting your vascular health.
Deep vein thrombosis is a condition in which a blood clot forms in a deep vein, most often in the lower body. Deep veins carry a large volume of blood back toward the heart. When a clot develops in these vessels, it can partially or fully block normal blood flow.
In many patients, the clot forms in the leg veins, especially in the calf or thigh. The body relies on steady circulation and healthy vein walls to keep blood moving upward against gravity. When that flow slows or becomes disrupted, clot formation becomes more likely, particularly in people who have additional risk factors.
To understand deep vein thrombosis, it helps to look at what physicians call Virchow’s Triad. This model explains that three main factors increase the likelihood of clot formation: slowed blood flow, injury to the vein wall and changes in the blood that make it more prone to clotting.
Slowed blood flow can occur during long flights or extended bed rest. Injury to the inner lining of a vein may result from trauma or inflammation. Certain inherited or acquired conditions can also make the blood more likely to clot. When two or more of these factors occur together, the risk of a deep clot rises. We can use the principles of Virchow’s Triad to identify risk early and help prevent DVT.
A clot in a deep vein can block circulation in the affected limb, which may cause swelling, pain or skin discoloration. In some cases, however, symptoms are mild or absent, which can delay diagnosis.
The greater concern is that part of the clot can break loose and travel through the bloodstream to the lungs, leading to a pulmonary embolism. This can interfere with oxygen exchange and can be life-threatening. Because of this risk, early evaluation and treatment are important when DVT is suspected.
Several underlying health conditions are linked to a higher risk of DVT. These include recent surgery, especially orthopedic procedures involving the hips or knees, active cancer and heart or lung disease that affects circulation.
Pregnancy and the postpartum period temporarily increase clotting tendency because of hormonal changes and pressure on pelvic veins. Patients with a prior history of DVT or pulmonary embolism are also at greater risk of recurrence.
Prolonged immobility is a recognized contributor to clot formation. Long flights or sedentary workdays can reduce circulation in the legs, particularly when movement is limited for several hours at a time.
Obesity, smoking and dehydration may also affect blood flow and vessel health. Even temporary situations, such as wearing a cast after an injury, can create conditions where blood pools in the lower leg and increase the chance of clot development.
Some patients inherit conditions that make their blood more prone to clotting. These disorders may not cause symptoms on their own, but they can raise the risk of DVT when combined with other triggers like surgery or immobility. Examples include Factor V Leiden and the prothrombin gene mutation. Certain autoimmune conditions can also alter clotting pathways.
Not every clot causes symptoms. In some cases, swelling or discomfort is mild and may be mistaken for muscle strain or minor injury, while other patients notice no clear warning signs at all. Up to 50 percent of patients with confirmed DVT may have minimal or no obvious symptoms at the time of diagnosis. If you have known risk factors or recent changes in health and something feels different in your leg, it is important to seek medical assessment even if the symptoms seem negligible.
There is a difference between surface vein disease and deep clots, but the two can sometimes overlap.
Varicose veins affect the superficial veins and are usually related to faulty valves that allow blood to pool, while DVT occurs deeper. Surface vein issues alone do not automatically lead to DVT, but patients with more advanced venous disease may have changes in circulation that warrant closer monitoring. Spider veins are smaller surface vessels and are generally cosmetic, though their presence can still signal underlying venous pressure that should be evaluated in the right circumstances.
A vein blockage refers to a clot that prevents blood from returning efficiently to the heart, which can lead to swelling and discomfort in the affected limb. A clogged artery limits oxygen-rich blood from reaching tissues. Arteries deliver blood under higher pressure, so blockage can result in pain with activity, skin changes or tissue injury.
When DVT is suspected, we begin with a clinical evaluation and review of your symptoms and risk factors. The primary imaging test used to confirm a clot is a duplex ultrasound, which allows us to assess blood flow and visualize the deep veins. In certain cases, additional imaging or blood tests may be recommended if the diagnosis is unclear or if there is concern about complications.
You should seek medical evaluation if you notice new swelling, persistent leg pain, warmth or skin discoloration in one limb, especially if you have known risk factors for DVT. Sudden shortness of breath, chest pain or unexplained rapid heart rate require immediate emergency care, as these may signal a pulmonary embolism. Even mild symptoms should not be ignored if something feels different or unusual for you.
DVT requires careful evaluation and timely vein treatment to reduce the risk of long-term complications and more serious events. At Shaheen Vascular in Mountain View, CA, we provide comprehensive vascular care grounded in advanced surgical and endovascular training. Dr. Shaheen will assess your symptoms and recommend treatment options.
If you have concerns about DVT or other circulation issues, call 650-965-1909 or use our secure online form to request an evaluation.
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