![]() Deep vein thrombosis can develop after major surgery, particularly pelvic, hip, or knee surgery. ![]() read more ) and lie in a hospital bed for several days without sufficiently moving their legs or in people whose legs and lower body are paralyzed (paraplegics). read more, or a stroke Overview of Stroke A stroke occurs when an artery to the brain becomes blocked or ruptures, resulting in death of an area of brain tissue due to loss of its blood supply (cerebral infarction). read more, chronic obstructive pulmonary disease Chronic Obstructive Pulmonary Disease (COPD) Chronic obstructive pulmonary disease is persistent narrowing (blocking, or obstruction) of the airways occurring with emphysema, chronic obstructive bronchitis, or both disorders. read more or other serious disorder (such as heart failure Heart Failure (HF) Heart failure is a disorder in which the heart is unable to keep up with the demands of the body, leading to reduced blood flow, back-up (congestion) of blood in the veins and lungs, and/or. ![]() This blockage causes unstable angina or a heart attack (myocardial infarction), depending on the location and amount. For example, deep vein thrombosis may develop in people who have had a heart attack Acute Coronary Syndromes (Heart Attack Myocardial Infarction Unstable Angina) Acute coronary syndromes result from a sudden blockage in a coronary artery. During prolonged bed rest and other occasions when the legs are not moving normally (such as after a leg injury or a stroke), blood flow slows because the person is lying down and the calf muscles are not contracting and squeezing the blood toward the heart. ![]()
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