Marie Johnson turned tragedy into a mission. In 2002, the CEO of Aum Cardiovascular lost her husband to a sudden heart attack, despite the fact that he was, by all accounts, a perfectly healthy man.

Fast forward 13 years and her company has commercialized a non-invasive test designed to quickly detect significant coronary stenosis called the CADence. Johnson hopes the pre FDA-approved device, which is on the market in Germany, will eliminate needless death due to coronary artery disease.

In this interview, recorded live at our DeviceTalks Minnesota event, touches on Johnson's incredible story.