Question and answer

Depending on which organ is affected by a blood clot and how severe the obstruction of blood flow to that organ is, untreated antiphospholipid syndrome can lead to permanent damage or death. Complications may include:

  • Kidney failure. This can result from decreased blood flow to your kidneys.
  • Stroke. Decreased blood flow to a part of your brain can cause a stroke, which can result in permanent neurological damage, such as partial paralysis and loss of speech (aphasia).
  • Cardiovascular problems. If a clot forms in your leg (deep vein thrombosis), the clot can damage the valves in the veins in your affected leg, which normally serve to keep the blood flowing upward to your heart. This may result in a condition called chronic venous insufficiency, which causes chronic swelling and discoloration in your lower legs, because of the impaired blood flow upward to your heart. Another possible complication is heart damage.
  • Lung problems. Complications related to your lungs may include high blood pressure in your lungs (pulmonary hypertension) and pulmonary embolism.
  • Pregnancy complications. These may include miscarriages, stillbirths, premature delivery and high blood pressure during pregnancy (preeclampsia).