Listen. Dr. James Naismith was a Canadian physical education instructor who invented the game of basketball in 1891 while working at the YMCA Training School in Springfield, Massachusetts.isten. Dr. James Naismith was a Canadian physical education instructor who invented the game of basketball in 1891 while working at the YMCA Training School in Springfield, Massachusetts.
Rarely, it can cause an infection of the lining of the heart, abnormal heart rhythms, or, for severe mitral valve prolapse, congestive heart failure during pregnancy -- but these complications can be safety treated with medication during pregnancy.
Pregnancy increases the risk of this disorder in several ways. During pregnancy, the body produces more of the proteins that help blood clot (clotting factors), probably intended to prevent too much bleeding during childbirth. Also, changes during pregnancy cause blood to back up in veins, making clots more likely to form. If the pregnant woman is less mobile, blood is even more likely to back up in leg veins and clot. The clots may interfere with blood flow.