When arrhythmias (including AFib) last long enough to affect how well the heart works, more serious symptoms may develop: Fatigue or weakness. Dizziness or lightheadedness. Fainting or near-fainting spells.

Does arrhythmia make you tired?

Arrhythmias may decrease the blood flow in your brain and body causing heart palpitation, dizziness, fainting or even death. If you have bradycardia, you may feel tired, short of breath, dizzy or faint.

How do you feel when you have arrhythmia?

An arrhythmia is an irregular heartbeat. It means your heart is out of its usual rhythm. It may feel like your heart skipped a beat, added a beat, or is "fluttering." It might feel like it's beating too fast (which doctors call tachycardia) or too slow (called bradycardia). Or you might not notice anything.