Atrial fibrillation (AFib) and atrial flutter are both arrhythmias, or atypical heart rhythms. Both conditions share similar causes, risk factors, symptoms, and treatments but differ in other ways.

A few of my friends have atrial fibrillation, often referred to as Afib. This is a condition where the heart’s upper chamber beats irregularly and fast. It can cause dizziness, fatigue, chest pain and ...

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 117 bpm ...