But there are very important differences between atrial fibrillation and atrial flutter -- both in terms of the precise mechanism of the arrhythmia, but also how they're treated.

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

Q: I’m a 67-year-old man who developed typical atrial flutter two years ago, but I haven’t had any symptoms that I am aware of. I don’t have a history of heart problems. My heart rate was ...

Jim Harbaugh heart condition Harbaugh has what's called an atrial flutter, which is a type of arrhythmia that causes the heart to beat at an abnormally high rate.

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.

Los Angeles Chargers head coach Jim Harbaugh revealed a heart condition caused him to briefly exit the team's 23-16 Week 6 win over the Denver Broncos. "It's called atrial flutter," Harbaugh said ...