How UNICORN makes a hole at the base of an old valve leaflet and expands the new TAVI valve through it, so the leaflet is pushed away from a coronary artery. Original diagrams; honest about evidence.

How LLAMACORN uses an electrified wire and then a large balloon to split an old aortic valve leaflet before valve-in-valve TAVI, and how it compares with BASILICA. Original diagrams; honest about evidence.