Hypertension, also known as high blood pressure, can cause lasting damage. Most people do not realize how serious this condition may be. It can cause strokes or heart attacks. While there are stem cell therapies that may be useful to treat strokes or heart attacks, the most important intervention is prevention. What is high blood pressure? Hypertension is when the force of blood running through your arteries is too high. It can cause lasting damage to the walls of these vessels. Over time, this damage can change how blood flows to organs and therefore cause damage to the organs themselves.