Heparin therapy refers to the use of the anticoagulant drug heparin to prevent blood clot formation in various medical conditions. Heparin works by inhibiting the activity of certain blood clotting factors, reducing the risk of clot formation and preventing conditions such as deep vein thrombosis, pulmonary embolism, and stroke. Heparin therapy is commonly used in the treatment and prevention of blood clots in patients undergoing surgery, those with certain medical conditions such as atrial fibrillation, and those at risk of developing blood clots due to immobility or other factors. It is typically administered through injection or intravenously and requires careful monitoring of the patient's blood clotting levels to ensure proper dosing and effectiveness.