It's hard to believe that something so tiny could save so many lives, but a tiny heart implant is being hailed as a miracle.
A cutting-edge device the size of a grain of rice is being used by experts at Guy’s and St Thomas’ to help patients with heart failure.
The cardiac resynchronisation therapy device is implanted into the chambers of the heart to treat heart failure. Unlike conventional devices, the innovative implant has no leads and is placed directly inside the heart tissue. This makes it work more efficiently and over time the heart’s lining grows over it, so it becomes part of the heart.
Dr Hilary explains more in the video above.