What is sudden adult death syndrome?

Tetiana_Kryvous/Shutterstock.com When Mark Hughes, the former Manchester United and Wales manager, lost his 38-year-old son, an inquest found the cause was sudden adult death syndrome, or Sads. He had appeared healthy. There was no obvious disease. For a family, that combination is almost impossible to make sense of. How can someone die from a heart condition when even a post-mortem might find nothing wrong with their heart? The answer starts with something easy to forget: the heart isn’t just…