Every few weeks, a new video surfaces: a young man collapsing mid-run, a fitness enthusiast dropping to the floor during a workout, a marathoner who never crosses the finish line. The clips go viral, the shock lasts a news cycle, and then the country moves on, until the next one. Renowned cardiac surgeon Dr. Devi Shetty, founder of Narayana Health, says this cycle is entirely preventable, and it starts with a test most Indians never think to take.