Steve Johnson was at home in Orange County, Calif., when everything started spinning. The tennis pro had just finished a grueling workout and assumed he was dizzy because he hadn’t eaten enough beforehand. A few minutes later, he started shaking while waiting in line at a bagel shop. Johnson ran outside and took a seat in his car, confused as to what his body was experiencing.
“I’m freaking out. My heart rate feels like it’s 200 miles per hour,” says Johnson, 31, iover the phone, recalling the incident that occurred in January 2018.
He reentered the shop, but the frightening symptoms returned.