Left ventricular assist devices have made it possible to keep children with heart failure alive while waiting for a heart transplant, yet at a significant risk of strokes and prolonged hospitalisation. But what do you do when the number of children waiting for a heart transplant is much greater than the number of hearts that become available? Dr Jacob Mathew can deal with almost any cardiac emergency, but this one troubles him the most. Professor Lynn Gillam helps to find a clear path through the angst and emotion that these cases throw up. Hosted by Professor John Massie.