Before Tim Landis died a year ago, there had been little indication he had heart disease. He’d had an active lifestyle and ate a healthy diet. But an autopsy revealed he had had years of untreated high blood pressure. His widow, Debra Landis, wrote a first-person account of losing Tim and her investigation into the disease that took his life.

Doctors have long known that women in the U.S. have a higher risk of dying from heart attacks than men.