It started like any other morning. A 50-year-old man was on his way to work when he suddenly felt weakness in his arm. It passed after a few minutes, but the episode left him shaken and unable to drive right away. He didn’t think much of it at first, assuming stress or fatigue were to blame. Two hours later, he arrived at the hospital, where doctors found he had high blood pressure, high cholesterol, and a history of smoking. His symptoms had disappeared, but what he had expe
