“Listen, I’ve got to call you back,” the 48-year-old man said to his client when the now-familiar but still-terrifying feeling started. He felt dizzy and lightheaded, as if he were about to faint. He ...

It’s normal to experience occasional heart palpitations due to stress, exercise, and excessive caffeine or stimulants. Write down what you were doing before your heart started racing. This record can ...

A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...