1.2 million individuals suffer from heart attacks each year and many of these are fatal and unfortunately those who survive will have scar tissue. Scar tissue does not pump blood as efficiently which leads to an  increased risk of having another heart attack. A heart attack sufferer does not have to be plagued for the rest of their lives. A study conducted at Cedar- Sinai showed that scar tissue in humans shrank between 30-47% using stem cells. This study amazed me because heart attacks are so common and if the heart efficiency can be improved this will lower the risk of another heart attack.                                                                                             

 Link to the study: http://www.cnn.com/2011/11/14/health/stem-cells-heart-damage-reverse/index.html