It's more literal than that. He's working with developing software for cellphones that detect an unhealthy condition from ECG signals, and possibly call for help automatically.
That's badass. I remember watching a program on t-shirts with microchips sewn into the material that can constantly feed heart rhythms and cardiorespiratory complications live to a computer that could then contact emergency services. Not to hijack this thread, but the other day scientists have practically defeated HIV: http://online.wsj.com/article/SB10001424052702303936704576397491582757396.html