Jim Harbaugh briefly left the Chargers vs. Broncos game in Week 6 because of a heart condition. Here's what to know about atrial flutter.

Symptoms of atrial flutter can include shortness of breath, fatigue, chest pain, heart palpitations or fluttering, dizziness or lightheadedness and fainting.

Then you feel your heart beating fast or irregularly. Maybe there's a flutter in your chest or neck. Maybe you feel dizzy or short of breath. You may feel so concerned you go to the emergency ...

In May 2022, Bryce De Witt, then 35, felt his heart flutter rapidly, what he recognized as a heart palpation. Two months later, he fainted and went to a local hospital. Doctors there found that he ...