3. Viral Infections
There are several environmental factors that may increase a person’s risk of developing the antiphospholipid syndrome. A viral infection such as the parvovirus B19 or cytomegalovirus or CMV could cause a person to develop the antiphospholipid syndrome. When the body is invaded by these viruses it will naturally increase the production of antibodies. The antibodies are designed to help fight off these viruses. In some people, the body may also produce antiphospholipid antibodies.
These antibodies will not fight the virus but will attack the proteins in the body. When this occurs it can weaken the blood vessels and cause other damage. In addition, the antiphospholipid antibodies for some reason cause the blood to clot more easily. This can increase the number of blood clots in the veins. When there are blood clots in the veins the heart has to work harder to pump the blood through, which can increase the risk of high blood pressure.