Helen Doyle was rushed to King’s College Hospital A&E from her local GP surgery in late October 2016. Helen, a keen runner, had been struggling to walk due to cramping in her legs but had assumed it was pulled muscles and ignored it. She went to the GP when it became nearly impossible for her to walk and her feet went numb. Doctors at King’s quickly found that the main arteries going to each of Helen’s legs were completely blocked with blood clots.