Medically reviewed by Christopher Lee, MD Key Takeaways Heart palpitations are noticeable changes in the way the heart beats.

But patients who have atrial flutter usually have a very regular heart beat. Now atrial fibrillation is much faster than atrial flutter, and it's also much more chaotic than atrial flutter.

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 ...

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

When is your heart rate normal and when is it dangerous? Experts explain what to do if your heart rate is too low or too high.

Is your heart racing because you’re in love or is it a sign of a more serious heart condition? A cardiologist explains how to spot the difference.

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.