The invention of the balloon-expandable stent

An estimated 2 million stents are implanted into people’s hearts around the world each year – making it one of the key treatments for heart disease. The treatment was invented by Argentinian doctor Julio Palmaz, who credits a piece of metal being left by a construction worker in his home as inspiration for the structure of the stent. Collaborating with a US Army cardiologist and getting funding from the owner of a fast-food chain and a pharmaceutical giant; the coronary stent was approved for use in human beings in the 1990s. Julio Palmaz speaks to Tim O’Callaghan about his invention. Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more. Recent episodes explore everything from the death of Adolf Hitler, the first spacewalk and the making of the movie Jaws, to celebrity tortoise Lonesome George, the Kobe earthquake and the invention of superglue. We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: Eva Peron – Argentina’s Evita; President Ronald Reagan and his famous ‘tear down this wall’ speech; Thomas Keneally on why he wrote Schindler’s List; and Jacques Derrida, France’s ‘rock star’ philosopher. You can learn all about fascinating and surprising stories, such as the civil rights swimming protest; the disastrous D-Day rehearsal; and the death of one of the world’s oldest languages.(Photo: Julio holding a stent. Credit: Julio Palmaz)