Summary
Highlights
VTE, or Venous Thromboembolism, refers to blood clots forming in the body's veins. 'Venous' means vein, 'thrombus' means clot, and 'embolism' means a clot moving through the bloodstream. There are three types: superficial vein thrombosis (clot just under the skin), deep vein thrombosis (DVT, a deep clot), and pulmonary embolism (PE, a clot that moves to the lungs).
DVT and PE are the most dangerous types of VTE, being common, serious, and potentially fatal. Risk factors include prolonged immobility, hospitalization or surgery, pregnancy, birth control pills, smoking, cancer, and genetic abnormalities. Prevention methods include compression stockings and blood thinners (anticoagulants) for high-risk individuals or before surgery.
Blood thinners (anticoagulants) are the primary medication for VTE, making blood clotting difficult and preventing clots from growing. Examples include warfarin, heparin, low molecular weight heparin (LMWH), fondaparinux, and direct oral anticoagulants (DOACs) like apixaban, dabigatran, edoxaban, and rivaroxaban.
DOACs act quickly, don't require regular monitoring, and have fewer interactions with other medications or food. Warfarin works slower, interacts with other drugs and food, and needs regular blood tests. Heparin and LMWH are short-acting and given via IV or shots. LMWH typically doesn't require regular monitoring, unlike heparin.
DOACs are the first choice for VTE in non-cancer patients, followed by warfarin. LMWH is preferred for cancer patients but is a third choice for most VTE patients due to daily injections. Treatment usually lasts at least 3 months, but can be longer depending on risk factors. Cancer patients may take them until cancer is gone, and some with recurring clots may require lifelong treatment.
For pulmonary embolism where faster clot removal is needed, thrombolytic therapy (clot busters) can be given via IV or directly to the clot through catheters. These are typically reserved for high-risk patients. If blood thinners are not an option due to bleeding risks, a wire basket 'filter' can be placed in the vena cava to catch clots before they reach the lungs. These filters can be removed once it's safe to start blood thinners.
Treatment for blood clots aims to prevent new clots, stop existing clots from growing, prevent clot pieces from traveling and limiting blood flow, avoid complications, and stop clots from reaching critical organs like the lungs, brain, or heart where they can be fatal. VTE can lead to lifelong health problems and even death, so discussing prevention and treatment with a doctor is crucial.